THE IMS1270 CIPS USER`S MANUAL (2)
Contents
1. Escu m j POIS RATBLOCK For some comments about how these formulas are derived from the basic statistical laws see the appendix Fundamental of Statistics When printing Statistics or Raw data the above computed reults are listed for each block In the case of Raw Data the cycle data SR are also listed Computation over the cumutaled data This spreadsheet bottom half displays the overall analysis result One result for each ratio with some additional data for estimating its uncertainty A box located close to CUMULATED RESULTS allows to select OVER BLOCK OVER DATA OVER BLOCK OVER DATA In the case OVER BLOCKS the block is considered as the elementary measurement and then the same statistical features as above in the BLOCK spreadsheet are computed In the case OVER DATA the partitionning into block is not taken into account CUMULATED RESULTS OVER DATA es e eee eee exactly the same computation is achieved as in the case of one block See above A single block is considered consisting of all the N analysis cycles The following table concerns only the case OVER BLOCKS EdC June 03 The IMS 1270 CIPS user s manual 2 22 48 CUMULATED RESULTS OVER BLOCKS es rr E i B RAT Y RAT N k Std dev STDE 4 X RATx RATY Bel k l 0 Std Err Mean 96 STER 100 STDE RAT 4B Mean value Poisson 96 POIS is the same than in the OVER DATA case i e by considering a single block c2. The Holder List Panel CURRENT POSITION display fields displays the stage current position GOTO X um Y um Editing field When the operator clicks the button GO TO See above the stage moves to the position edited in these boxes or shift the stage of the values edited in these boxes according to the selection Absolute Relative See below Absolute Relative selects the operating mode of the GO TO Command INIT launches the Stage Init process The stage moves to both axis stops The overall travel is recorded The stage is then moved at the stage center X 0 Y 0 as it is defined by these 2 pairs of stops READ reads the current position at any time and displays the position in the Current Position fields This button is to be used when the operator wants to refresh this data faster than the automatic update QUIT for quitting the panel Panel Right hand side The graphical window displays the Holder type and the Holder list points but it allows also to control the stage in the following way e Driving the vertical cursor moves the stage along the X axis e Driving the horizontal cursor moves the stage along the Y axis e Driving the cursor cross point moves the stage along both the X amp Y axes For the Zoom and the shift facilities see below scale and offsetx amp y At the cursor cross point there is a red circle As its radius is always 500 um it gives the scale when the image is zoomed Note that the Holder list poin
3. Load Calib L Amplifiers Calib File 4 spacefims cips_datafinstrument ampli cal Keithley 642 electrometer control g OVL Protect calibration table linearity factor ampli offset Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 43 48 VFC Resolution for Ctime Is gain 1 selects the frequency the same for all the channels The inverse of frequency is displayed with the corresponding voltage resolution VFC Time range maximum allowed counting time The counter maxi is 16 Mcps So if the input channel is scheduled to be at full range and the frequency set at IMHz VFC Time range should be set at 16s Waiting time and counting time are the default values Possible values of VFC gain are 1 1 10 10 Use VFC calib enabled means that the linearity and offset tables The VFC_Calib table and not the Amplifiers Calib table will be taken into account Note there are 2 VFC PCBs in the Camac crate VFC1 and VFC2 MC amps calib opens the window for starting the FC amplifier calib routine VFC Calib opens the window for starting the VFC semi auto calib routine Contents 7 EdC June 03 The IMS 1270 CIPS user s manual 2 44 48 11 3 5 FCs Calibration Can be opened from the main Tuning panel Refer to the CIPS user s manual 1 section The main Tuning Panel L Apply calibration permanently FCs CALIBRATION Amplifiers settling time
4. See the hereunder section EM HV Adjust INIT Drift correction opens the box dedicated to run the EM PHA featuring routine See below EM PHA featuring EM drift measurement Discri parameters opens the SetThrparam box dedicated to edit the different thresholds involved in the EM PHA featuring routine See below Set Thresholds for the PHA featuring routine Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 26 48 8 2 2 Set Thresholds for the PHA featuring routine Available from The EM Drift Measurement Measurement Parameters button p 42 yb The pull down menu L Z LZ LI C AxiaV HI H2 H 2 Thri Thro Thr4 located at the top of the window is purposed to select the 50 3 30 275 EM detector Thr3 Thre Thrl Thr4 EDIT Fields 4250 370 edits the EM thresholds used in the EM drift mesurement procedure See Appendix 2 The EM drift correction principles T mee M All same checkbox to set the same values for all the EM waiting time S Sor Channels o cycles ooo waiting time Meas time EDIT Fields set the timing parameters of the Overall PHA featuring and the drift measurement routines OK validates the edited data and close the box Cancel closes the box without modifying the thresholds z y sese 4ns3 Contents T 8 2 3 EM HV Adjust 8 2 3 1 Overview As it is explained in the section Appendix 1 The EM Physical principles EM aging CIPS user s manual 3 when an
5. CIPS user s manual 2 39 48 Columns configuration size um DUOPLASMATRON Field aperture Contrast aperture L4 aperture Primary mass resol aperture multicollectars slits electrometer type Mass range 300 00 S CAMECA o JCAMECA i Energy f10000 00 Correction factor Cameca Energy gap Sample hv Full Scale Correction k HV pos Kk HV neg rooo00 1 00000 setup file path el Laboratory name CAMECA User name date time Comments Default setup Simulation mode All hardware disabled DEFINE SETUP vV GENERAL PRINT SETUP wi PREFERENCES ww EdC June 03 The IMS 1270 CIPS user s manual 2 40 48 11 3 2 Hardware setup Path TOOLS Setup Hardware set up This interface is to be used only for service purpose Note that the selection CAMAC 68030 corresponds to the 2 different ways for the main FC1 and EM acquisition Standard Cameca counting channel or CAMAC There are 2 connections between the Host computer and the keyboard uP RS485 dedicated to the motor control RS232C kbd port to the file transfer and the RS232C Mul port to all the connections between the keyboard software and CIPS involved in the multicollector control mode F CAMAC T 68030 Simulation ON OFF allows l to test the overall CIPS without any instrument serveur Server name Use 642 voltmeter FC2 Magnet control type on meoo ae 19bits v R5465 keyboard Multicol Si
6. FARADAY CUP MEASUREMENT PRINCIPLE ERROR BOOKMARK NOT DEFINED 12 5 APPENDIX 5 FUNDAMENTAL OF STATISTICS ERROR BOOKMARK NOT DEFINED 12 6 APPENDIX 6 LABVIEW GRAPH OPTIONS AND GRAPH CURSORS ERROR BOOKMARK NOT DEFINED EdC June 03 end of contents Contents T The IMS 1270 CIPS user s manual 2 4 48 1 Introduction See The IMS 1270 CIPS user s guide 1 2 The M B table See The IMS 1270 CIPS user s guide 1 3 Starting the instrument See The IMS 1270 CIPS user s guide 1 4 Checking the instrument before an analysis See The IMS 1270 CIPS user s guide 1 5 Defining and Running an isotope analysis See The IMS 1270 CIPS user s guide 1 6 Other Analyses See The IMS 1270 CIPS user s guide 1 Contents T 7T Displaying and processing the Isotope analysis results 7 1 Overview When clicking on the main bar menu DATA PAGING both the curve browser box and the curve panel are displayed the curve browser box allows to select the current analysis or any previous analysis file name The curve panel allows to display and to process any set of curves Y X Ym X Where Yj Ym are the signals measured within an analysis and corresponding to the different species defined in the analysis species table see the section The SPECIES table box EdC June 03 The IMS 1270 CIPS user s manual 2 5 48 7 2 The curve_browser box sj curves browse
7. analysis Let k 1 to B be the block index in the same analysis Let j 1 to n N B be the cycle index in a block Let m 1 to M be the mass index Raw data SR displayed in the Raw data panel and printed as Raw data All the raw data SR are expressed in counts per seconds EM case Count m i T m SR where Tm is the Mass m counting time and Count the number of counted counts during Tm Faraday case I m i SR i GLARE ET 1 602177 10 Where Ini is the Faraday current measured in Ampere Corrected data SC 1 correction Yield background deadtime do GR bck Y 1 SR bck dt m Sc Where Ym bckm dtm are respectively the yield the background level and the deadtime corresponding to the Masse m For defining these corrections see the previous section The Main Spreadsheet panel For some comments about these corrections see below the Appendix The EM and Faraday corrections If a channel yield correction is not enabled Y is set to 1 If a channel Background correction is not enabled Bck is set to 1 If a channel deadtime correction is not enabled dtm is set to 0 2 correction Linear Drift Defining the cycle slopes pm as DO oi ICM SC P ni d Do cycle if i l Pur P prp if G 1 amp i N p c P7 Pn if i N Pig ws Where Ty cic is the overall cycle time derived from the species table The linear drift correction is defined as EdC Ju
8. eere e e e ene enne ener nnns ene ese e ese ese e essa S aines 33 9 3 THE HOLDER LIST PANEL echec ete Ree eei 35 EdC June 03 The IMS 1270 CIPS user s manual 2 3 48 10 IMAGE PROCESSING iis veciscisasacesscccinessnsnscesiavesicoansncnneiaseinonsecsacgulscnsvawsassauestaneruneasats 36 11 TOOTS e 36 Wel STABILITY mc pr 37 11 2 PERIODIC TABLE iarunn on A E E 38 11 3 SETUP PANNES vcscrcsceistznse esencerenednrdicrenawsenmeetd stupas vaneieseeus cust ruoneavaakestupeaseauaten tas unseeenauenqice 39 LL31 General set p MT TR 39 TL 32 Hardware setup 41 ILI Detection Setup aaa clad eee teal idt Seti iiu taco td set esu adapt 42 11 3 4 Measure set_up ode dal xv Rust inpa EUM eae ati uu Eu ends 43 11 393 SACS CUD o0 E 45 11 3 6 FCs Offset Calibration cccceccescessescesscsscessesssececsescesnceseessecesecaasescenacseeesecenees 46 11 4 OTHER OOLS i deassitiocYctntee id inen VER e Max V UD pd EROR D DU as tM A dia RE 47 15 POS 0 TERTIO cmt T 47 II Vacu m SOI OS denied duet tet acl d duet Sa eats ditm ta E ETES 47 TLAS COPE do OE 48 12 APPENDICES sissssccsssssccsscapinessssioonesssancesass ERROR BOOKMARK NOT DEFINED 12 1 APPENDIX 1 THE EM PHYSICAL PRINCIPLES ERROR BOOKMARK NOT DEFINED 12 2 APPENDIX 2 THE EM DRIFT CORRECTION PRINCIPLES ERROR BOOKMARK NOT DEFINED 12 3 APPENDIX 3 THE QSA EFFECT ERROR BOOKMARK NOT DEFINED 12 4 APPENDIX 4 THE
9. hardware See User s guide for Multicollector However note that the deadtime is not the single parasitic effect which depend on the count rate Other phenomenas are involved in the EM measurement process such as the EM amplifier baseline drift which is caused by the fact that the EM amplifier is AC coupled Finally t can be considered as well as an empirical first order correction with respect to the couting rate The EM yield and background Even at low count rate a part of the secondary ions are not detected by the EM system This yield Ygm is normally determined by comparing both FC and EM signals for a count rate close to 10 cps When no secondary ions are emitted some parasitic counts are detected by the EM This background signal bck can be measured Generally it is close to a few counts per minute Finally the full correction formula of EM detection can be expressed as The linear drift correction The accuracy required for an isotopic ratio may be as small as 0 0196 while the order of magnitude of the primary current stability within an analysis is 1 When ratios are calculated within a cycle it is clear in the case of monocollection analyses that the different masses are measured at different time and that primary current drift may occur or even if the primary current is stable enough secondary signal drift may occur for various reasons It can be therefore desirable to drift back the measurements so that all the cycle mass
10. opened the Holder list panel CANCEL for quitting the panel without executing the Stage Navigator command which has opened the Holder list panel PRINT for printing FILE SAVE LOAD allows to save the current Holder List or to recall a previously stored list EdC June 03 The IMS 1270 CIPS user s manual 2 35 48 The Holder List Table item display Editing field label of the stored point automatically incremented if not edited X Position Y Position display Editing field Point coordinates in um Automatically recorded and displayed by using Store Position in the Stage Navigator panel Comments Editing field Contents T 10 Image Processing displayimage vi open PRY eg iter A export home ims cips d ata data test_rae 1 aim 26 0400 w 3 wit Direct v cameca vi 28977 sum 40 um Contents 7 11 TOOLS EdC June 03 The IMS 1270 CIPS user s manual 2 36 48 11 1 Stability In the Tool menu click Stability jg Sampling period mn ss fT Dwen 6y 3 00 ei EC gt Dpuoo vi nA cps selection for the field located just below This DISPLAY Fiela displays the mean value of the curve plotted in the graphical window Sample time EDITING Field Time interval between 2 measurements Dwell EDITING Fiela Counting Time PRIMARY STABILITY D sPLAY Field Computed statistical results AT I Slope STDE computed over the currently displayed data START STOP for starting and
11. spreadsheet table is divided into two parts The upper part displays the data computed over a single block while the lower part displays the data computed over the overall analysis cycles In the first case the cycle is taken as elementary measurement and in the second case with the selection OVER BLOCK the block is taken as elementary analysis EdC June 03 The IMS 1270 CIPS user s manual 2 11 48 The user may process the raw data by himself It is possible to export data to ASCH files or SO format See below the button PRINT WARNING The Raw data are always expressed in counts per second As the counting time is always contained in the raw data files it is always possible to compute the number of counts per cycle for every species Contents 7 EdC June 03 The IMS 1270 CIPS user s manual 2 12 48 7 5 2 The spreadsheet EM and Faraday corrections For the EM and Faraday physical principles refer to the appendices The EM Physical principles and The Faraday cup measurement principles in the CIPS user s manual 3 The EM deadtime Let s assume that the EM counting system is such that after the leading edge of a counted pulse the system is paralysed during a so called deadtime t If Nmeas pulses are actually counted during one second that mean that the effective counting time was not 1 second but 1 Nt This leads to the deadtime formula meas 1 N aks T On the IMS1270 the EM deadtime is normally determined by the
12. threshold is successively switched n cycle times from Thrl to Thr3 n cycle being defined in the Set Threshold box It results for every EM involved in the control a table measurement cycle relative Yield where the relative Yield is computed according to the determining the current c EdC June 03 The IMS 1270 CIPS user s manual 2 31 48 section It is then possible to interpolate a Relative Yield from the measurement cycles to all the analysis cycles Finally it results a table cycle relative Yield 8 4 EM Yield drift correction in the data spreadsheet If the automatic EM Drift correction is included within an analysis See the previous section EM Yield drift measurement within an Isotope Analysis it results a table cycle relative Yield and the EM signal can be corrected in the spreadsheet See the above section Processing the results with the isotope spreadsheet according to the formula bck bck t with a specific yield Yzm Yeycile for every cycle where Yoycie is the relative yield of the cycle relative Yield table 1 N meas N corr Y Y 1 N EM cycle meas Contents T 9 The stage Navigator HOLDER 9 1 Overview The stage Navigator is an interface dedicated to the control of the sample stage either in an interactive mode in combination with the optical microscope viewing or in a batch mode for running a chained analysis See the CIPS user s manual 1 sectio
13. 30 s OK updates the measured offsets which will be further substracted OK fills the line ampli offset of the table Amplifiers Calib e Ifthe box is enabled it will be filled with the measurement result taking into account e Ifthe box is not enabled it will be filled with zero So the normal use of this interface is 1 remove all the enabling crosses of the table 2 Press OK 3 Enable the boxes corresponding to actually used FC channels 4 Press OK EdC June 03 The IMS 1270 CIPS user s manual 2 46 48 11 4 Other Tools 11 4 1 Preferences Path TOOLS Setup Detection Setup Preferences 151270 WITH TURBO PUHPS IM3270MLTI Paths Laie Lag o Instrument Directory Use defaults ispace ms cips_data nstrument 11 4 2 Vacuum synoptics Contents T sj synoptic vac IMS1270 vi oe Closed or Off E Opened or On NWTTITTPTTMNI ETE orr IP Start Supply 1 EdC June 03 The IMS 1270 CIPS user s manual 2 Reading 310 Period s 10 anon Chamber EE Coupling n M i9 Le ier Ws ejm se m 1P2 STOP _w TP2 _ START v AFF cesium Mj AIRLOCK ROD M PRIMARY EN pesi wow v mes sro vj SECONDARY co Er eme prieme e vu ON IP Hoki Supply E L al 47 48 Contents T 11 4 3 Other tool
14. Drift Correction button p Em DRIFT MEASUREMENT PHA DISPLAY r EHEHEHE Li bx Lambda 1 00 Bela 200 Yield 1 00000 dv vyl Alpha 2 50 sigma Sigme 2E 2 Sigma 340 00 Measurement parameters button opens the window Set Threshold Enabled detectors L2 L1 C H1 H2 EM checkboxs select the detector channels involved in the PHA featuring or drift measurement routines Mode Overall PHA Drift Measurement selects the routine to be run If Overall PHA 1s selected refer to the CIPS user s manual 3 section The EM drift correction principles Before analysis S Thr overall featuring o and calculation If Drift Measurement is selected refer to the CIPS user s manual 3 section The EM drift correction principles During analysis determining the current o and therefore the yield drift HI H2Z CLLI LZ Axial pull down menu selects the channel which is displayed in the box Fit coefs Ref in displays the 4 coefficients Lambda Beta Alpha Sigma previously calculated last Valid New Fit coefs displays the 4 coefficients Lambda Beta Alpha Sigma calculated Yield displays the relative yield derived from the new sigma according to the formula EdC June 03 The IMS 1270 CIPS user s manual 2 30 48 af tort tari O 7 g T Yiu oO e where o is the last validated sigma and o the new sigma It displays 1 00 just after a Valid dY Y dsigma sigma displays the
15. EM is used there is an aging phenomenon consisting in a gain decrease and requiring therefore to increase the EM High Voltage EM HV all along the EM life for compensating the aging The EM HV routine is purposed to re adjust automatically EM HV EM HV is set to keep the PHA curve within a given template featured by a couple of value Thr1 Thresh 100 Thr3 Thresh 50 Practically the routine does not process the PHA curve but it just set EM HV so that when setting the EM discriminator threshold to Thresh 50 the signal is the half of this corresponding to Thresh 100 Note that the Thresh 100 value is typically the same that the working threshold normally kept fixed all along the EM life EdC June 03 The IMS 1270 CIPS user s manual 2 27 48 8 2 3 2 Description Available from The PHA window EM HV Adjust button x y x y EIU 0 Bl error seso j 310 EM HV Adjust Measurement Parameters axial EM w 50 Thr my 250 00 START STOP Measurement Time S 0 10 10095 Thr mv 50 00 EM HV Adjust Progress EM HV v 0 00 Coef test EM HV 0 05 Loopnb 0 EM HV NbLoop 100 Delta 0 000 EMHV Epsilon 0 005 The EM HV Adjust routine main box VON ON WV Yv Y Measurement parameters clicking this button opens the editing box MEM HV Adjust Parameters The box is opened with the parameter values as they were previously set EM HV adjust
16. START STOP Starts or stops the routine EM HV displays the EM HV value all along the routine completion Loop nb displays the number of the routine loop in progress Delta displays which must be smaller and smaller if the routine is converging See below the definition of Quit closes the box and updates EM HV Restore closes the box without updating EM HV The EM HV Adjust parameter box 100 Thr digits edits Threshold 100 the reference threshold value normally close to the working threshold value typ 70 50 Thr digits edits Threshold 50 which set the EM signal at the half of the amplitude obtained when the threshold is set at Threshold 100 typ 350 EM HV Time s edits the step counting time corresponding to Threshold 100 or Threshold 50 as well typ 1 s Coeff test EMHV edits the routine feedback coefficient k At each routine step EM HV 1s readjusted accordingly to EMHVnew EMHV orp a k EdC June 03 The IMS 1270 CIPS user s manual 2 28 48 0 5 I py Thr10096 I py Thr5094 I Thr100 with Igu Thr 10096 and Igy Thr50 being the EM signal obtained with the EM threshold set at Thr100 and Thr50 typ 0 1 gt EMHV nbloop edits the routine maximum number of loop typ 10 gt EMHV Epsilon edits the routine convergence test coefficient which is compared to 6 typ 0 005 Apply writes in the Setup file the Measurement Parameters box modified par
17. Statistical data Ratios computation Display l Corrections to Raw data Blocks amp Cycles definition This last task requires to tackle with some statistical issue An appendix presents some basic results of statistics Some comments are necessary to explain how to apply these statistical results to the ion counting detection In the case of using an EM for measuring the ion signals it is clear that a large enough number of counts is necessary to estimate a ratio at a given accuracy It is explained in the appendix Fundamental of Statistics that when measuring N counts during a given time T the unavoidable dispersion on this measurement is N providing that N is larger than a few units This is also true in the case of FC measurement but this uncertainty is then always EdC June 03 The IMS 1270 CIPS user s manual 2 10 48 dominated by the preamplifier noise Consequently when a ratio is derived from two numbers of counts N and N there is an unavoidable uncertainty which can be expressed as value R k zm 1 As it is explained in the appendix Fundamental of Statistics this formula 1s slightly more complicated in the general case when the ratios are defined as m M a gt a S R m l m M by Y b S m l The spreadsheet allows to divide the overall analysis into sub measurements and to 1 1 JN Mm in the spreadsheet as Poisson to the actual exper
18. THE IMS1270 CIPS USER S MANUAL 2 Data Processing and Tools Customizable Ion Probe Software Version 4 0 EdC June 03 The IMS 1270 CIPS user s manual 2 1 48 CIPS user s manual 2 June2003 not fully documented for Image Processing Periodic table General Setup Hardware setup Other Tools CONTENTS end of contents lL INTRODUGC EION e ciddsbxiDbt deietvia so beu bx Do PEE erba lvii dep ever esc OVE ea 5 2 THE M B TABLE uec ettseecihost obiexebsbuee Genesi eepd tx hk etai On dU PONE ND MDPEEEUIO REED 5 3 STARTING THE INSTRUMIN T ecceseevisuES eue eene khe au SEN REGE DIR ne Ro dn eek 5 4 CHECKING THE INSTRUMENT BEFORE AN ANALYSIS eere 5 5 DEFINING AND RUNNING AN ISOTOPE ANALYSIS eee e eee ee eene nenne 5 6 OTHER ANALYSES iccicnves oni eri RW RR ER RE RR AREE ER ERR XENON NE ER E XD vessi 5 7 DISPLAYING AND PROCESSING THE ISOTOPE ANALYSIS RESULTS 5 7 1 OVERVIEW zi5ieeietecteateheee ite tatebeteteit ette tatehetemtetute ene eds 5 7 2 THE CUI VE BROW SEBO OT 6 7 3 DISPLAYING AND PROCESSING THE ANALYSIS RESULTS WITH THE CURVE PANEL 7 7 4 THE CURVE PROCESSING FUNCTIONS csccccssccccsscecsccccececcssceaccccsceauecccscecsessensecenes 8 7 5 PROCESSING THE RESULTS WITH THE ISOTOPE SPREADSHEET eere 10 7 5 1 COVE V I CW ira aeons RENE 10 Ld The spreadsheet EM and Faraday corrections sess 13 7 5 3 T
19. Yield drift to Sigma drift ratio calculated according to the formula B aM Ap E dojo o Start launches the featuring PHA featuring routine The routine will be run according to its Measurement parameters Thresholds timing Stop stops the routine and computes the coefficients if at least one cycle was run Valid gives to the last computed coefficients the status of last validated coefficients They are there displayed in the upper part of the box Fit coefs ref in and the Yield drift will be calculated with respect to this measurement Quit closes the box Measurement cycle diplays the routine cycle in progress 8 2 4 3 PHA Display Description See the pannel above Em Drift Measurement Description The displayed curve is according the formula Thr3 ji qu Oo Oo S Thr S3 i Checking the Diff box displays the dS dThr The EM PHA featuring routine measured data can be displayed at the box bottom Contents 7 8 3 EM Yield drift measurement within an Isotope Analysis The Drift Measurement routine as it is described in to the CIPS user s manual 3 section The EM drift correction principles During analysis determining the current o and therefore the yield drift can be run automatically during an analysis See the section the EM Drift control in the CIPS user s manual 1 The EM Drift Control routine is run at a number of measurement cycles defined in the EM Drift Control box For the considered EM the
20. a performance measurement and does not involved any further correction offset with calibrator is the result of the routinefirst cycle and is not taken into account in the offset correction the previous line is used Mean value displays the different mean values along the routine cycles Contents 7 EdC June 03 The IMS 1270 CIPS user s manual 2 45 48 11 3 6 FCs Offset Calibration Can be opened from the main Tuning panel Refer to the CIPS user s manual 1 section The main Tuning Panel and also TOOLS Setup Hardware setup Config DAS Offsets This window is targetted to allow a fast update of the FC amplifier offsets without running the overall calibration routine FCs OFFSET CALIBRATION Counting Time s 230 0 L2 zz 3 L1 ac 5 H1 amp H2 TM FC2 S FCi amplil L ampliz L2 ampli3 L1 ampli4 C ampliS H1 amplib H2 ampliz H 2 ampli amp FC2 ampliS FC1 relative Vield 1 000000 1 000000 1 000000 1 000000 amplioftset o00E 0 000E 0 nooE 0 oo0E 0 Ampli Calib File q space ms cips_data nstrument ampli cal 9 1 000000 0 00E 0 1 000000 0 00E 0 1 000000 1 000000 1 000000 0 00E 0 p 00E 0 0 00E 0 counting time edits the overall measurement time typ
21. ameters and closes the box gt Cancel closes the box without writing in the setup file the box modified values Contents T 8 2 4 Overall PHA featuring drift measurement 8 2 4 1 Overview The Overall PHA featuring amp drift measurement tool is purposed to run manually the both the Overall PHA featuring and drift measurement routines The Overall PHA featuring routine corresponds to the procedures described in the CIPS user s manual 3 section The EM drift correction principles Before analysis S Thr overall featuring c and a calculation It consists of switching successively the selected EM thresholds to the five values Thr0 Thr1 Thr2 Thr3 Thr4 and to record the EM signal This is repeated a given number of cycles The Drift measurement routine corresponds to the procedures described in the CIPS user s manual 3 section The EM drift correction principles During analysis determining the current o and therefore the yield drift It consists of switching successively the selected EM thresholds to both values Thr and Thr3 and to record the EM signal This is repeated a given number of cycles For both routines the values of different thresholds Thr1 and the sequence timing parameters waiting time counting time number of cycles are edited in the Set threshold parameters box EdC June 03 The IMS 1270 CIPS user s manual 2 29 48 8 2 4 2 Em Drift Measurement Description Available from The PHA window nit
22. anual 1 section The EM Drift Control The EM Drift correction is applied if the spreadsheet EM drift correction checkbox Top bar is checked See for this correction the above section The EM and Faraday corrections Cycle is a combo which allows to display the result of any measurement cycle for example 1 11 21 31 EM L2 L1 allows the EM selection if the EM Drift control routine has been run with several EM Yield Sigma dY Y dsigma sigma displays the results of the measurement cycle selected above Interpolated correction coef displays the relative yields as they are applied onto every cycle Contents 7 EdC June 03 The IMS 1270 CIPS user s manual 2 18 48 7 5 4 The spreadsheet computed cells This section contains a lot of formulas The hereunder glossary may help the reader which requires to have a precise knowledge of the formulas involved in the CIPS spreadsheet GLOSSARY i 1 to N N k 1 to B B j 1 to n N B n m 1to M M Count counts Ini A SRm i CPs T sec Yms bckm cps dtm ns SCm i CPS Pmi T cycle SEC SC CPS STDE STER 9 POIS 4 RATBLOCK RAT STDE STER 4 POIS 94 RAT EdC June 03 Cycle index in a N cycle analysis Total analysis number of cycles Block index in the same analysis Number of Blocks Cycle index in a block Number of cycles in a block Mass index Total number of measured masses defined in the sp
23. ayed at the right hand side of the graphic window OVERLAY switches from OFF to ON Clear Overlay hides the integral curve Smooth Iter Editing field is the number of times the operator has clicked OK EdC June 03 The IMS 1270 CIPS user s manual 2 Remove Cancel Intensity Level 96 Cancel Surface Cancel Normalize OK Cancel Cancel 9 48 Processing function dedicated box Span Editing fieldis the order of the filtering achieved Iter previously to the derivation It cannot be lower than 5 Span Cancel Contents T 7 5 Processing the results with the isotope spreadsheet 7 5 1 Overview The Isotope Analysis spreadsheet is dedicated to the following purposes e To define the ratios which must be displayed and computed e To display the isotope ratios as final results of the analysis e To modify the correction parameters taken into account in the ratio computation and to display therefore the different steps of the computing process which transforms the raw data into the final result e To estimate the uncertainty of the isotope ratio measurement and to help for searching for the causes of non reproducibility Analysis Raw data Ratio amp Defined gt Midi
24. d box Move the cursor to the point to be removed and click OK in the dedicated box The removed point is replaced by another point interpolated between its two neighbours Background substraction Intensity Editing field to enter the background level wich will be substracted by clicking OK Default value is the displayed curve maximum Level Display field the background percentage level is calculated with the displayed curve maximum It is also possible to select the background level with the cursor 10 Surface Surface Display field displays the surface located between the curve and both cursors 10 and 11 Normalize Click the rectangle just below Normalize in the dedicated box Select among Normalize NO Normalize to Max Normalize to flat top peak The last selection is available only 1f the Peak information box Measure Flat is opened see the section Featuring a High resolution Spectrum with the Peak Processing Derivate curve Click the rectangle just below order in the dedicated box Select among None first second for first and second derivatives span Editing fieldis the order of the filtering achieved previously to the derivation It cannot be lower than 5 A second scale is displayed at the right hand side of the graphic window OVERLAY switches from OFF to ON Clear Overlay hides the integral curve Integrate curve Computes and displays the integral curve A second scale is displ
25. dicators of the LabVIEW user s gide See the appendix The LabVIEW graph unctions curves vi So v LIN LOG SCALE achieves an autoscale The cursor table See the appendix The LabVIEW graph functions p 16 36 CURVE allows to select the curve which is to be processed This selection is required as far as a set of several curves is displayed in the graphic window EdC June 03 The IMS 1270 CIPS user s manual 2 7 48 MEASURE opens the peak information box dedicated to the High Resolution peak processing See the section Featuring a High resolution Spectrum with the Peak Processing PROCESS Remove Background substraction Surface Normalize Drivate curve Integrate curve Smooth according to the the selected functions a small dedicated box is opened in the panel right hand side and cursors are assigned to the processing function For a detailed description of all these functions see the following section The curve processing functions SHOW Analytical conditions Acquisition conditions Raw data Analytical conditions displays the Analytical parameter box See the section Defining an isotope analysis Analytical parameters Acquisition conditions displays the analysis SPECIES TABLE box See the section Defining an isotope analysis The SPECIES TABLE box COMMENTS opens a Comment panel where it is possible to edit some comments which will be attached to a graph print This comment panel is not automatical
26. ecies table EM Raw data FC current Raw data signal counting time related to the mass m Yield which is applied as a correction onto the raw data Background which is applied as a correction onto the raw data Deadtime which is applied as a correction onto the raw data Data signal after the Yield bkg dt corrections if required Slope dSR dt Overall cycle time Corrected data signal including the linear drift correction if required Ratio calculated over a single cycle Ratio calculated with the raw data SR Numerator of RAWRAT Denominator of RAWRAT Mean ratio calculated over a block Ratio experimental standard deviation calculated over a block k experimental standard deviation of the mean computed over the block k Estimated uncertainty of the ratio computed over the block k Accuracy of the ratio computed over the block k data if the single cause of uncertainty was the finite number of counts Ratio calculated with the overall data of the block k Mean ratio calculated over the overall analysis cycles Ratio standard deviation calculated over the overall analysis set of blocks Estimated accuracy of the ratio computed over the overall analysis cycles Accuracy of the ratio computed over the overall analysis data if the single cause of uncertainty was the finite number of counts Ratio calculated with the overall analysis data The IMS 1270 CIPS user s manual 2 19 48 Let i 1 to N be the cycle index in a N cycle
27. eet panel The Spreadsheet panel can be displayed by clicking DATA PAGING in the Main bar menu ane o hile in nthe Curve pu See the above section laying ar cessin Tee ec ire scace T Perpa stares TEER n BIA puo Ta m zs Be Frasas iien D m H N H pub E AEN EET zm TAGIALIAEIU HUS cages sectaet ate cage seat a I ELTIEI ILIA Fa INNSSIIQIUS AUMVARARANAARANAANAM pon UNT p mu IU LIE ILIAD SEIS Display data file z mm S iret z COMMENTS P ee e D ICM 144014040242 40A EIL ET TA ULL LAUD SLAVO CRUEL ATA CAE AELAEa REA EC A SCAVALCA LATATA MEUSE The spreadsheet computing parameter box right top corner For every loaded analysis raw data these parameters can be modified with an immediate update of the results EdC June 03 The IMS 1270 CIPS user s manual 2 15 48 Cycle Editing field number of cycles per block The number of blocks is deduced from the analysis total number of cycles and displayed in the Block box diplay field The EM drift Yield Background Dead Time Linear Drift chekboxes enable or unable the respective corresponding corrections according as they are checked or not See the above section The EM and Faraday corrections The display Editing fields Yield Bkg c s Dead time nS displays first the corresponding values stored in the detection set up panel See User s guide for Multicollector Chapter Software tools for testing the Hardware They can be edi
28. ent according as the analysis is run in a monocollection or a multicollection mode e n the monocollection mode it will be recommended to add in the analysis cycle a background mass typically an integer number 0 5 in order to record the current offset at each cycle It will be then possible to define ratios See the section The SPECIES TABLE box The Ratio Defining box in the user s manual 1 where this offset signal is subtracted from each Faraday signal e Inthe multicollection mode the offset measurement must be performed before the analysis See the hereunder section FCs Offset Calibration Once recorded the FC offset will be automatically subtracted in a software sublayer In the same way an automatic routine allows to record the respective efficiency of the different Faraday channels See the hereunder section FCs Calibration Further this calibration results will be also taken into account in a software sublayer Both the FC offset and the FC yield are not transferred in the detection set up panel In the detection set up panel it is expected that the EM yield is different from 1 and the EM deadtime different from 0 and further that in the spreadsheet EM yield and EM deadtime corrections must be applied But in the case of FC detection though the user can also apply such corrections they must normally be set to zero Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 14 48 7 5 3 The Main Spreadsh
29. he Main Spreadsheet panel sse 15 7 5 4 The spreadsheet computed cells ccsscsucsaxucennvaascsvavasseseavnasnsseratossniuen ssasuvansicterentonss 19 7 5 5 Processing a set of analysis resulting ratios sss 23 8 THE EM CONTROL AND EM DRIFT CORRECTION eere eren enne ee enenn 24 8 1 aiugsudn 24 8 2 KOOLS MN OR TEUER 25 8 2 1 PHA Menlo AUI M M LEM es 25 AS Td PREVIOUS TMC TONS ceste d ope p QUEEN oc RD rds ERO UB RA DUNS 25 8 2 1 2 New functions related to EM drift sse 26 8 2 2 Set Thresholds for the PHA featuring routine sse 27 8 2 3 EM FAVE AGIOS TIU 27 RAN MENS CEVICW E 27 8232 JDESEHDDUOD uisus ai asi a Ddse n Dod E n ai dus DNUS ERE 28 8 2 4 Overall PHA featuring drift measurement sse 29 8 24 l SOV CRVICW coi Sareea sete tede aere oret eE on esee oco eee tu ea ede vue c eet io enero ees EROE 29 8 2 4 2 Em Drift Measurement Descriplioti isse beet tee bb te RN I RR pM BUSES 30 8 2 4 3 PHA Display DeSCTIDUOR iecienide cia Li UTR RE r E QUE EROS DEUS S P RERI CL VM E MM KG 31 8 3 EM YIELD DRIFT MEASUREMENT WITHIN AN ISOTOPE ANALYSIS eene 31 8 4 EM YIELD DRIFT CORRECTION IN THE DATA SPREADSHEET eere 32 9 THE STAGE NAVIGATOR HOLDER sscsssssosssssssssscssscssesssssscssscssssssnacsssessssssssees 32 9 1 OVERVIEW eniaieeut deniie uiui eee niieanie 32 9 2 THE STAGE NAVIGATOR PANEL
30. heet either the current acquisition data in real time or previously saved data Read data filr opens the CIPS file manager box If Read Acq is selected Display Acq will be further displayed there If Read Data file is selected Display Data File will be further displayed there Isotope files Mass spectrum allows to select the type of analysis which will be sorted by the file manager box File CONDITIONS Current CONDITIONS According to this selection the analysis cycle partitioning into blocks is defined in the first additionnal Isotope box See the section The additionnal ISOTOPE boxes Analysis time Cycles Blocks or in the spreadsheet panel top The rejection option is also adressed by this option Display EM Drift data Displays EM Correction box RATIOS Display Ratios define Ratios allows to display in a dedicated box the ratios RO RI R2 corresponding to the spreadsheet columns or modify these ratios or to define new ratios See below the Display Ratio Box if Define Ratios 1s selected In this last case the Ratio Defining box is opened For using this box refer to the CIPS user s manual 1 the section The SPECIES TABLE box The Ratio Defining box SHOW Analytical conditions Acquisition conditions Raw data Analytical conditions displays the Analytical parameter box See the CIPS user s manual 1 section Defining an isotope analysis Analytical parameters Acquisition conditions displays the analysis SPECIES TABLE b
31. imental standard deviation of the mean labelled in the spreadsheet as Std error mean measured among the set of considered sub measurement A sub measurement may be an elementary analysis cycle or a block of cycles When both Poisson and Std error mean are very close it can be deduced that there is no other cause of dispersion than counting statistics within the analysis When this criterion is not met in the case of EM measurement or when FC measurements are involved in a ratio definition the spreadsheet allows to investigate if the measured dispersion is of stochastic type or drift type If the dispersion is stochastic it will be possible to estimate the uncertainty of the overall measurement This will be not possible in the case of a drift dispersion In the spreadsheet the complete set of N n M cycles are divided into M blocks of n cycles compare the unavoidable uncertainty el in the more simple case labelled Criterion for stochastic Std error mean among blocks dispersion es std error Mean among cycles M t3 JM Uncertainty std error mean among blocks VM In the case of drift dispersion though the dispersion value is of interest a confidence interval cannot be deduced It is necessary to run several analyses to check if the criterion for stochastic dispersion is met for this set of analysis The couple Blocks cycles is then replaced by the couple Analysis Blocks As it can be seen the
32. ly refreshed for a new analysis PRINT DATA GRAPH PROPERTIES Normally for the factory set up only allows to modify the cursor properties the curves coulours etc For using this panel the user must read the chapter 16 of LabVIEW user s manual See the appendix LabVIEW graph options and graph cursors SPREADSHEET opens the Spreadsheet panel SAVE Open the file manager box for saving the processed data Overlay Off Overlay On An additional box overlay is opened when overlay On Note that this box automatically opened if the processing options Derivate or Integrate are selected allows to manage several sets of curves on the same plot When the Overlay box is opened a second Y scale is displayed at the graphical window right hand side Contents 7 7 4 The curve processing functions When using any processing function it is recommended to check that the cursors required for the processing are displayed on the screen If they are not check that the cursor color is not transparent Normally the useful cursors can be driven with the mouse This feature is set in the Graph Properties panel It is always possible to move a cursor by blackening the square in the cursor table and by clicking the special cursor button lt Y Processing function dedicated box Remove The double Vertical amp Horizontal cursor 10 is assigned to this function EdC June 03 The IMS 1270 CIPS user s manual 2 8 48 Processing function dedicate
33. measurements could be considered as simultaneous When the linear drift is ON this drift back can be attempted by interpolating all the mass measurement at the location of the first mass in a time scale Note that such an interpolation is of very small interest regarding the overall result since it can be demonstrated easily that the relative error resulting from a signal drift in the monocollection mode is t ol Belt T I EdC June 03 The IMS 1270 CIPS user s manual 2 13 48 Where ft is the delay between the 2 ratio mass measurements within a cycle T is the overall analysis time and M the relative signal drift between the beginning and the end of the analysis The EM drift correction The EM Drift correction can be enabled only if the EM drift control was selected for the analysis See the section the EM Drift control in the CIPS user s manual 1 and the hereunder section EM Yield drift measurement within an Isotope Analysis As it is explained there the EM Drift Control run along an analysis provides with a table cycle relative Yield which make it possible to apply the EM correction formula O l p Nas Bek Vou Yu 1 Nye bck 7 cycle meas with a specific yield Yzm Yeycile for every cycle where Yoycie is the relative yield of the cycle relative Yield table Contents Faraday corrections In the Faraday mode the dominating error is the offset drift The strategy of correction is far differ
34. mulating the successive cycles Then the button turns to ACCUMULATING If ACCUMULATE 1s displayed the cycles are not accumulated SET THRESHOLD SETTING For setting the threshold click SET THRESHOLD Then the button turns to SETTING It is then possible to grab the vertical cursor with the mouse pointer and when the mouse pointer leaves the graphical window the cursor value will be loaded into the instrument This can be checked on the keyboard display When the button displays SET THRESHOLD the mouse pointer can be used for moving both cursor along the curve and displaying the coordinates of the current point in the small boxes located just below the plot Scan parameters EDIT Fields Thresh Min typ 60 mV and Thresh Max typ 600mV are the lowest and the uppest values of the scanned threshold step typ 40 is the scan number of points Measurement time typ 50ms is the counting time per point Discri parameters EDIT Fields These parameters allows to set the dependence of the actual threshold voltage on the keyboard variable expressed in digits between 2048 and 2047 Normally the following values must be edited min value mV 0 0 DAC min bits 0 max value mV 2000 0 DAC max bits 2048 But other values might be entered if the user has mounted another discriminator Contents T 8 2 1 2 New functions related to EM drift EM HV Adjust opens the box dedicated to run the automatic routine targetted to set the EM HV
35. mulation DUO AUTO RMN i ON ol OFF d ON d ON ol DER ol OFF Hardware adresses R5485 port multi motors Keitley 485 Picoammeter GPIB adress Camac Gpib Address timeout NNNM kl F d r RS232C Mul port gj E FIL 25000 RS232C vacuum port 3s RSe3eC Kbd port A RS232C Trackball port RS232C Remote Stage Control FK642 Slot Number VFCI Slot Number LC2551 Slot Number KY3655 Slot Numbe 0 23 Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 41 48 11 3 3 Detection Setup Path TOOLS Setup Detection Setup This interface must be used each time a EM or a FC are swiched on a collector In the Finnigan electrometry chamber each amplifier has a number Note that A 9 is the FCI Cameca amplifier and A 8 is the FC2 Keithley 642 amplifier Axial detectors parameters are the signal level threshold for automatic switching within an analysis The FC to EM theshold must be smaller than the EM to FC for avoiding unstabitity in the threshold Electrometer neighbourhood Eck Eid Multicol waiting time Axial detectors parameters FC gt EM Treshold i pees C Treshold Multicollector safety is the level threshold which Multicol waiting time ms g g ooo triggers a grounding of the detector ESA outer check overload check overload mode electrode in order to ORE remove the ion current a ee from the collector EM fc maximum counts tector naramaten Detector parameters yield Backgr
36. n Running a chained analysis For this last purpose the stage Navigator allows the user to build a Holder list which is a mapping of all the points of interest for a given sample holder prepared with given samples The coordinate system origin is the sample holder center See JNIT in the Stage Navigator panel Typical operations performed with the stage Navigator e Carrying the stage at the loading position for introducing a sample Hoder LOAD HOLDER e Selecting the Holder synoptic Single or 3 Holes etc according to the present loaded holder The selected holder type is then displayed in the Holder graphical window e Moving the stage either with the command GO TO or with the Holder graphical window By observing the optical microscope or the MCP video camera window the operator can move more accurately the stage to an analysis point e Recording a past or future analysis point in the Holder List by clicking Store position The recorded point is then displayed in the graphical window e Recalling a holder list stored point by clicking Recall position e Transferring the coordinates of a Holder list point to the chained analysis table See the section Running a chained analysis EdC June 03 The IMS 1270 CIPS user s manual 2 32 48 9 2 The Stage Navigator panel From the main bar menu click HOLDER HOLDER new vi HOLDER NAME S SAMPLE ITEM E fi GOTOX um GOTOY um Z 0 eal 0 jm Move to Holati
37. ne 03 The IMS 1270 CIPS user s manual 2 20 48 SC m Sc i Pmi id f ta m i Where is the cycle time location of the Mass m counting time and t the reference cycle time location defined by the selection Linear drift See above the section The Main Spreadsheet panel For some comments about these corrections see below the Appendix The EM and Faraday corrections Ratios Any numerator and denominator ratio can be defined as a linear combination of the species counting rate See the section The ratio Defining box Cycle Ratio m M Ay T S SC i RAT m l m M b Se SC m l The cycle Raw Ratio is further used for the Poisson calculation m M a a SRBL z NUMRAT RAWRAT re DENRAT k b Y b SRBLm m 1 SRBL mis the mean SR computed over a block data Computation over one block data The spreadsheet top half displays statistical computing within the block k The displayed block k can be selected by the user the incrementable box close to BLOCK RESULT EdC June 03 The IMS 1270 CIPS user s manual 2 21 48 BLOCK RESULT a ee MEMMSMN ANUNEN Mean value Std dev STDE zn S RAT RAT n del 0 Std Err Mean 96 STER 100 STDE RAT An Poisson 96 m M g2 m M 12 SRBL SRBLm 5 gt m 1 m m l m 4n NUMRAT DENRAT Integrated Mean m M jn ay gt d Sse m 1 j l m M j n b
38. ontaining all the data Integrated Mean m M i N ay Me SC J i N RA T m 1 b Ho 5 Be J i l m l Contents 7 7 5 5 Processing a set of analysis resulting ratios The panel Computing can be opened from the panel Spreadsheet Not yet documented Contents 7 EdC June 03 The IMS 1270 CIPS user s manual 2 23 48 Contents T 8 The EM Control and EM drift correction 8 1 Overview As it is mentioned both in this document Zhe EM physical principles EM aging and in the User s guide for Multicollector the EM aging is an issue regarding the isotope ratio measurement reproducibility especially in the multicollection mode since along an analysis each EM channel may have a different drift In order to give the user means of controlling the EM aging effect ant to correct the resulting drift a software package has been developped When a precision better than 10 is targetted for isotope analyses involving multicollector EMs the hereunder strategy is recommended 1 Periodically typ every 10 hours of EM use at 200000cps the EM HV must be reset using the automatic EM HV Adjust tool This will ensure that the PHA will be kept within a given template to its normal template 2 At any time the PHA featuring tool allows to feature the EM PHA 3 Comparison between 2 set of PHA features allows to compute the resulting EM yield drift This can be run manually in the EM drifi measurement tool 3 During an isotope analysi
39. ound and Dead time are those taken into account in the tuning interfaces yield Background c s Dead time n5 See the section Appendix 1 The EM Physical principles Detection setup Hardware setup Opens different Setup pannels Preferences opens the Preference pannel for selecting the different configuration options Apply closes the pannel and saves the setup modifications Quit closes the pannel without saving the setup modifications Define Setup Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 42 48 11 3 4 Measure set_up Path TOOLS TEST Camac read test setup Measure set up Path TOOLS Setup Measure set_up Measure Control 3655 Time Range 3655 ext clk 1 65 s E 1 00E 6 Z er Mode M Source Slintemal SWFC VFC Time Range s646 VFC Resolution for CTime 1s gain 1 Waiting time Counting Time al 4 1 6e 5 160uv 0 1 00000 3 1 00 VFCs Gain Control Set gain for positive ions and for negative ions Set VFCs polarity for positive ions the polarity will be automatically changed according to the secondary polarity by Applying Setup VFC1 Gain Setting eect ger Mer Her Her Mer MET 1 2 3 4 5 B VFC Gain Setting Use VFCZ calik M z 5 5 4 RE feet 3 1 PE 3 1 st VFCI Calib File 3 7space ims cips data instrument vfc1 cal VFC2 Calib File S spaceAms cips data instrument vfc2 cal
40. ox See the section Defining an isotope analysis The SPECIES TABLE box COMPUTATION Opens the Computation panel dedicated to the display and processing of an overall set of analysis resulting ratio PRINT DATA Statistics Rawdata Print to file DOS Print Raw to file DOS Print to file 1S0 Print Raw to file ISO allows to print either the spreadsheet statistical data or the Raw data Note that the Raw data listings contain also the statistical results Options Print to DOS allows to write the data into an ASCII file readable by a PC in order for example to process the data with in a standard spreadsheet SO is the UNIX ASCII format accepted by spreadsheet Microsoft Excel under MacIntosh SAVE opens the CIPS file manager box in order to save the spreadsheet data CURVES Switches to the Curve panel In the same way in the Curve panel the spreadsheet button allows to switch to the spreadsheet panel EdC June 03 The IMS 1270 CIPS user s manual 2 17 48 SET CORREC Export to set up Transfers the data contained in the spreadsheet panel top fields Yield Bckg deadtime to the Detection Set up panel Auto_save_ascii When this button is black all the analysis output data files and processing output data files are automatically saved in an ASCII format file additionally to the normal Labview format file The Display Ratio Box This box displays the results of the EM Drift Control routine Refer to the CIPS user s m
41. ps 40 The Tool PHA is targetted to display the Pulse Height Amplitude distribution curve of any EM main axis EM or multicollector EM in order to check its aging and to set either the EM HV or the EM Threshold The PHA acquisition consists of an EM signal counting when scanning the threshold The scan parameters define a scan cycle The menu bar L ZLZ LI CHHIAZ H 2Z7FCI EM FC2 located at the top right hand side of the window is purposed to select the detector to be measured START STOP Click START for launching the acquisition Then the button turns to STOP and the scan cycles do not stop until the operator clicks STOP LOG LIN for displaying the curve with a logarithmic or a linear curve After being clicked LOG the button turns to LIN INT DIFF When the operator clicks NT the button turns to DIFF Then the direct curve Thr EM is displayed on the graphical window When the operator clicks DIFF the button turns to INT and the derivative of the direct curve is displayed This derivated curve is normally more familiar to the user EdC June 03 The IMS 1270 CIPS user s manual 2 25 48 NO FILTER ORDERI ORDER2 ORDER11 allows to select a smoothing function The option NO FILTER is recommended ACCUMULATING ACCUMULATE Click ACCUMULATE for accu
42. r vi 05 19 03 12 31 PM test dis This box is attached to the Curve panel It allows to load the current analysis or any previous analysis file name in the Curve display window FILE CONDITIONS CURRENT CONDITIONS both selections are equivalent if READ ACQUISITION or DISPLAY ACQUISITION is selected in the left side field below In the other case selection of READ FILE or DISPLAY FILE it allows to display the data of a previous analysis file with the current graphic conditions scale curve selection etc or with the current spreadsheet conditions computed ratios correction READ ACQUISITION DISPLAY ACQUISITION READ FILE DISPLAY FILE According to the selection READ DISPLAY the curve or the spreadsheet window will be selected and opened According to the selection ACQUISITION FILE the current acquisition or a previous acquisition file will be loaded WARNING If NONAME is selectected in the next field no file box will be opened for selecting a file ISOTOPE HIGH RESOLUTION Filters the analysis filename wich will be proposed for being displayed Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 6 48 7 3 Displaying and processing the analysis results with the curve panel For opening this panel click DATA PAGING on the main bar menu or CURVES in the spreadsheet panel For an advanced use of this panel processing functions it is highly recommended to read the chapter 16 Graph and Chart Controls and In
43. s 55 00 olari Negative Counting Time s 2 5 00 poeti calibration table ampia ampli2 L2 amplis L1 ampli4 C amplisH1 ampligrHe ampli7sH2 amplivF C2 amplis F C1 linearity factor 2 000000 2 000000 2 000000 2 000000 2 000000 2 000000 2 000000 0 000000 0 000000 relative Yield 1 000000 1 000000 1 000000 1 000000 1 000000 1 000000 1 000000 1 000000 1 000000 ampli offset 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 offset with calibrator ov 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 0 00E 0 Calibration completed Mean value 9712E 11 5 Ampli Calib File amp spaceAms cips data instrument ampli cal oe This interface window is dedicated for running the FC amplifier calibration routine which activates the Finnigan hardware It is advised to run this routine once per day if the multicollector is used in FC mode with a required high accuracy Once the routine is achieved the relative gains and ampli offsets will be taken into account The FC amplifier calib routine consists of 3 cycles Input ref 0V 4 5V 9V The reference voltage is connected as input for each of the 9 amplifiers So if both the settling time and the counting time are set to 5s the overall routine will last 4mn 30sec When the 3 cycles are completed the FC are connected and all the channels output are read for filling the line ampli offset Linearity factor is just
44. s Set up See the section Starting the Instrument The instrument Set up panel Vacuum Clicking Vacuum opens the synoptics which allows to control the vacuum system and to display its status See The IMS 6F IMS 1270 User s guide Chapter 4 Vacuum system operation Init Serial Lines Initializes all the serial lines RS232c trackball RS232c kbd RS232c vacuum processor and RS485 motirized aperture bus Dead Time Not yet documented Multicol See User s guide for Multicollector chapter Tools for testing the Hardware Test Tests Hardware Camac purposed for service people Not yet documented Contents T 12 Appendices 12 1 Appendix 1 The EM Physical Principles See The IMS 1270 CIPS user s guide 3 12 2 Appendix 2 The EM drift correction principles See The IMS 1270 CIPS user s guide 3 12 3 Appendix 3 The QSA effect See The IMS 1270 CIPS user s guide 3 12 4 Appendix 4 The Faraday cup Measurement principle See The IMS 1270 CIPS user s guide 3 12 5 Appendix 5 Fundamental of Statistics See The IMS 1270 CIPS user s guide 3 12 6 Appendix 6 LabVIEW graph options and graph cursors See The IMS 1270 CIPS user s guide 3 Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 48 48
45. s session involving samples and standard analyses the EM HV is not re adjusted but the same routines as in the PHA featuring and EM drift measurement tools can be run automatically either every block within an analysis or before each elementary analysis See sotope Analysis Then the EM yield drift correction may be activated in the analysis data processing spreadsheet Both the mathematical model of EM drift correction and the processing routines required for the yield corrections are presented in the CIPS user s manual 3 section Appendix 2 he EM drift correction principles Contents T EdC June 03 The IMS 1270 CIPS user s manual 2 24 48 8 2 Tools 8 2 1 PHA 8 2 1 1 previous functions PHA _cameca vi s n Leps v Pulse Height Analyzer Ei plats Es mu 8 0E 4 75E 4 d Efficiency 93 77 7 0E 4 eae BSE 4 integral cps 1 27E 6 sea 5 5E 4 5 0E 4 4 5E 4 4 0E 4 3 5E 4 3 0E 4 2 5E 4 2 0E 4 1 5E 4 1 0E 4 5 0E 3 0 0E 0 my 5 8E 3 T T 1 T 1 T T T 0 100 200 300 400 500 600 700 600 834 S 106 Cursor 068 75 26684 _ 1B amp he F Measurement time ms prre seo C ceang 7 NO FILTER Init Drift Correction ACCUMULATE min value mv 0 0 DAC min bits 3 0 Thresh min 4150 0 mV E a S max value mV x 2000 0 DAC max bits El 2048 SET THRESHOLD Thresh max 800 0 mV ste
46. stopping the stability measurement LIN LOG graphical window Y axis scale selection SNAP LIVE if LIVE is selected the displayed right end point is always the last acquired point If SNAP is selected the operator can shift the display window all along the measurement time The display window width it is a time interval is determined by standard LabVIEW ways See the appendix LabVIEW graph options and graph cursors PRIMARY EM FC Selection of the recorded signal CESIUM DUO in the case of primary signal recording allows to display the type of the current measured source Contents 7 EdC June 03 The IMS 1270 CIPS user s manual 2 37 48 11 2 Periodic Table am e POLARTYHNT p 3940 42 44 46 4849 EdC June 03 The IMS 1270 CIPS user s manual 2 38 48 Search parameters Min abundances 1 00E 3 Mass Power res 300 Max elements 2 Coumpounds list 1H 1 007825 160 15 994915 180 17 999159 interferences list SYMBOL A M interference A M U abundance MRP 170 16 99913 170 160 1H 17 00274 9 98E 1 4711 1 1 L L 17 000 17 020 17040 17056 H i Min abundance hoea Contents T 11 3 Setup pannels 11 3 1 General setup Path TOOLS Setup General Setup This interface must not be very used The first block is used only with IMS 6f equipped with CIPS The second block is never used The last block concern the headers displayed and printed with the plots EdC June 03 The IMS 1270
47. ted further without modifying the content of the set up panel Except if the user clicks the spreadsheet panel bottom button SET CORREC Export to Set Up This box allows to define for each detection channel a set of correction parameters Y bck dt As the analysis species table contains the correspondances between measured mass Mm and a detection channel it is finally possible to build a Mass correction table m Yn bckm dtm For the use of these parameters see below the section The spreadsheet computed cells For some comments about these corrections see below the Appendix The EM and Faraday corrections Mass MeanTime M 1 M2 allows to select the exact location in the analysis cycle where all the measurements will be interpolated in the case of Linear drift Selecting Mean Time means that all the measurements will be interpolated at the middle of the cycle selecting M means that all the measurements will be interpolated at the mass M measurement time This selection defines the time t within a cycle where all the mass signals will be interpolated For the use of t see below the section The spreadsheet computed cells Other fields of the spreadsheet panel top Condition file display field The analysis definition path and filename corresponding to the current spreadsheet data Rejection condition display Editing field When new data are read it displays the value recorded in the additionnal ISOTOPE box See
48. the section The additionnal ISOTOPE boxes Analysis time Cycles Blocks It must be an integer Let us call it nj This field can be further edited Whenever statistical computations over a set of data are required a preliminary computation of the pair average o is achieved Then all the data outside the interval average nejo average Njo are rejected and the final computation does not take into account the rejected data BLOCK SIZE display field Number of cycles contained in the block as it is defined in the analysis definition file It is not updated if the user modifies the spreadsheet field Cycle Total Cycles display field Total number of cycles Block display field Number of blocks taking into account the total number of cycles displayed in the spreadsheet field Total cycle and the number of cycles per block edited in the spreadsheet field Cycle If the preadsheet displays the current analysis option READ ACQU see below the B ock field displays the index of the current block EdC June 03 The IMS 1270 CIPS user s manual 2 16 48 Cycle display field Number of cycles per block as it is defined in the Analysis definition file or edited in the spreadsheet field Cycle If the preadsheet displays the current analysis option READ ACQU see below the Cycle field displays the index of the current cycle within its block The spreadsheet bottom panel buttons Read Acq Read Data file allows to load in the spreads
49. ts are attached by a line This is a way to display them even at low magnification Valid Cursors have an effect onto the stage motion only if the Valid button is black Holder type None Single Multiplel Multiple2 4Holes allows to define the holder type currently loaded The holder holes are then displayed in the grapgical window goto display fields displays the cursor state actual position At a steady state it must display the same data as the Current Position fields Scale The cursor located just above Scale allows to tune the ZOOM from 1 to 100 The zoom center is the graphical window cursor cross point Offsetx offsety Editing field allows to shift the graphical window image EdC June 03 The IMS 1270 CIPS user s manual 2 34 48 9 3 The Holder List Panel This panel is opened by the Stage Navigator panel buttons LOAD HOLDER Store Position and recall position holder_list vi FILENAME 105727703 HOLDER NAME 03 30 PM tem X position Y position comments E o 9m 40 D asse BI FILENAME display field displays the filename given when saving the holder list See below FILE HOLDER NAME Editing field this name will be also displayed in the Stage Navigator panel Insert Item Inserts a line in the table Delete Item Deletes the table current line Clear Table Clears the Holder List OK Validates the Stage Navigator command LOAD HOLDER Store Position Recall Position which has
50. ve press GO TO to move stage or drag X or and Y cursor CO Trackball Locked L Show remote controls CO Set beam off while moving stage Em NE Left hand side bar GO TO Moves the stage to the position X Y edited in the boxes X Position and Y Position See below LOAD HOLDER UNLOAD HOLDER Moves the stage to the loading position in order to unload or to load a sample Holder It also opens the Holder List panel Position Track Ball Assign the track ball to the stage control Store Position Opens the Holder List panel and add as a new point the current position displayed in the box Current Position In the Holder list panel OK will validate this storing operation See below the section The Holder list panel Recall Position Opens the Holder List panel The operator must then select a line The Holder list panel OK will move the stage to the selected position See below the section The Holder list panel Abort aborts a stage motion GO TO A DEFINE POSITION direct access to all the X Y stored positions The selection in the list of one of these will trigger the stage motion Panel Central Part HOLDER NAME display field displays the Holder Name edited in the the Holder list panel See the next section The Holder List Panel EdC June 03 The IMS 1270 CIPS user s manual 2 33 48 SAMPLE ITEM display field displays the number of the position selected in the Holder List table See the next section
Download Pdf Manuals
Related Search