Time-to-Digital Converter - User Manual
Contents
1. Tab Coincidence Counters Inside the device not in the PC there are some counters implemented that tell the user how many events there were during the last Exposure Time 6 The reason why this is already done in the device is that this way one is not limited by USB to transfer the time tags to the PC Hence higher count rates can be reached Single count rates are measured for all 8 channels only channels 1 to 4 have coincidence counting too 8 The bar chart shows the current count rates First channel 1 to 8 singles then two fold coincidences events that occur within a time difference smaller than the Coincidence Window 5 between channels 1 amp 2 1 amp 3 1 amp 4 2 amp 3 2 amp 4 etc then 3 fold and 4 fold coincidences Tab History 9 The line chart shows the time evolution of one of the 19 counting channels see 10 10 You can choose the channel by this box quTAU User Manual Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 1 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info2. USB interface LAN interface Digital GPIO interface Operating Systems LASER COMPONENTS Min Max Unit 8 2 4 5 V 0 8 ns 55 ns 50 1000 Q 10 Mcps 25 Mcps 3 Mcps 60 100 ps USB 2 0 high speed 100 Mbit s 24 I O signals LVTTL Windows XP Vista 7 Linux current distributions France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 info lasercomponents fr www lasercomponents fr Laser Components UK Ltd Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se Power supply voltage 90 240 VAC Power supply frequency 50 60 Hz Power consumption 5 W Power connector IEC inlet Mechanical dimensions 23 5x9x31 cm half 19 2 HE Weight 3 kg Version 3 0 United Kingdom Nordic Countries USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS Changelog Version 3 0 August 17 2012 e Firmware update Please update the firmware with the new firmware update utility e Firmware update utility modified Please use the new version only e The user DLL has been renamed to tdcbase dll e The daisy server daisysrv exe is not used by the user lib tdcbase dll anymore it connects directly to the USB This means
3. by example0 from a command line It will take data for about 2 seconds and display some results e 50 time tags in hex plus channel number Version 3 0 Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS e The most recent internal counter values channel 1 8 2 fold coincidences 6 3 fold coincidences 4 4 fold coincidences 1 and all the rest 1 e 2 time difference histograms the channel independent one and the one between channels 1 and 2 The parameters for these are Bin width 250 native bins i e 20 ns number of bins 40 Command Line Interface II qutau exe The second command line interface userlib source qutau exe has a few more features than the previous example It is still intended as an example but some basic tasks can already be
4. ps is not constant but rather alternating After each narrower one there follows a wider one This is a characteristic feature of the TDC chip in the device and can lead to effects like the time difference histogram shown in Figure 1 Time tags bit width The internal size of time tags is 56 bit They will overflow after Figure 1 Time difference histogram with alternating population 256 1 81 ps 5836665 12 s 67 55 d Necessary Software Download the latest software http www qutools com download list ph package from our website Linux support The quTAU offers Linux support for current major distributions Although this manual focuses on Windows users most of the concepts are identical or very similar If you have specific questions or problems using the quTAU with Linux please contact us directly see Some examples e To record time tags for 10 seconds as text to the file textfile txt use qutau exe t 10 f textfile txt e To record time tags for 100 seconds into a binary file binfile bin use qutau exe t 100 F binfine bin e To record time difference histograms for 20 seconds with bin width 1 and number of bins 5000 to the file hist txt use qutau exe t 20 H hist txt b 1 B 5000 e To show the count rates with integration time 500 ms coincidence window size 10 bins 10 times 81 ps use qutau exe C e 500 c 10 Contact Version 3 0 Germany amp Other Countries Laser Comp
5. running please close it Turn on the device Start nhflash exe from the start menu or the main software directory After some time the LED should get green and the text Hardware ID 0 or similar should be displayed see Figure 3 5 Select the firmware you want to update Targets to update You can select all at once if you want 6 If all of this is OK please press Flash The green LED should start flashing until it is finished At the end of the process the LED should be green again and the text close to it should read Update complete 7 Press the button Close The firmware update utility is closed 8 Turn the quTAU device off and possibly on again If you don t do this the old firmware will still be in effect until the next restart Ro NB Version 3 0 Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821
6. termination can course reflections and hence wrong results 3 Data loss LED If this gets red the device could not transport enough time tags over the USB Probably the event rate Is too high for the system to cope 4 Self test In this case the Burst Periods i e the number of pulses in a burst is fixed to 1 so that there will be a periodic signal with only two parameters left a Channel Mask Here you can decide which of the channels should be fired upon by the self test It has to be set in binary i e 0 means none 1 is channel 1 only 2 is channel 2 only 3 channel 1 2 etc b Burst distance The period of time between two signals in multiples of 20 ns minimum is 40 ns 5 Stop Please always use this button to stop the VI since then it can gracefully shut down the software Measurement area right hand side Tab Counter 6 Coincidence Window bins Sets the coincidence time window in bins see above in the corresponding section of the GUI 7 Line chart displaying the count rates of the first 4 single channels and all possible coincidence combinations see above 8 Array display on the right showing the values as numbers The numbers are measured with respect to the exposure time see 1 Version 3 0 Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 1 info lasercomponents com www lasercomponents com France laser Co
7. that you cannot use the GUI daisy and the user lib or multiple user lib clients simultaneously e The channel numbers are 1 to 8 in all output data files e Installer You can either use the installer or copy the content of the zip file where you want it e The GUI daisy exe shows all available different histograms now not only the channel independent one e Bug fix The histograms are now calculated like start stop measurements Each event is used as a start for that particular channel but only as a stop if there was no event on that channel in between e Histogram output from qutau exe changed The histograms between channels A and B are combined B A is the negative part A B the positive The two 0 bins are added see known problems below Histograms A A have not changed there the negative bins are empty e The maximum event rate through the user library has been increased Hints known limitations and problems e Histogram bin 0 When the bin width of the histograms is 0 you can add the 0 bins of histogram A B and B A When the bin width is greater than 1 the 0 bins will not be quite correct Version 2 0 June 5t 2012 e The driver has been updated to increase the throughput Please use the new one from our webpage see below e The user DLL now qutaubase dll has been redesigned and the documentation has been extended see below e The Labview VIs have been redesigned to fit the user DLL e Th
8. y axis against the array index 23 Buffer Size You can set the length of the array that is fetched in each turn If it is too small or not fetched often enough this is set by the Exposure Time ms control in the upper left corner of the VI then some time tags will be lost due to full buffers see LED Buffer full 24 Write to file Switch this on to write the time tags into a text file The first column is the time tag in 81 ps units and the second column is the channel number In between there is a tab 25 Binary format When this button is turned off the output will be human readable text first time tag in 81 ps units then comma blank and the channel number from 1 to 8 When turned on the output gets binary first 8 bytes of time tag then two bytes for the channel number byte order Little Endian 26 Path Open this dialog to specify the file path and name Please have a look at the documentation userlib doc index html of the user DLL for further information Command Line Interface I example0 exe The command line interface CLI is located in daisybase quTAU and is called example0 exe The sources can be found in the same directory It uses the libraries in the same directory and communicates with the hardware via the daisysrv process It needs the following DLLs copy them from the main software directory e tdcaubase dll e nhconnect dll e QtCore4 dll e QTGui4 dll Call it
9. 3 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS Firmware Update Attention Naturally firmware updates are a delicate process and can potentially damage the device if done incorrectly This should be done only when it s advised to do so by the manufacturer In this case please read and follow these instructions carefully DSP When a firmware update is required please use the program nhflash exe Figure 3 in the main software directory Targets to update Core FPGA qutau core bit Appl FPGA qutau appl bit qutau dsp ldr Devices to update V Hardware ID 0 or from the start menu to do so You will OG Device ready find the current firmware in the directory firmware there should be three files Flash qutau core bit qutau_appl bit S m ne de fee update sene nhflash exe qutau_dsp ldr They contain the firmware for the core FPGA infrastructure the application FPGA handling the TDC chip and the DSP of the quTAU device respectively The update utility checks on startup whether all three files are in place and will tell you if not Please stick closely to the following steps If the device is running please switch it off If any quTAU software is still
10. 7041 info lasercomponents com www lasercomponenis com Detectors Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com LASER COMPONENTS Software concept The quTAU software concept is depicted in Figure 4 The device is connected via USB 2 0 so the first piece of software handling it on the PC side is the USB device driver The device driver talks either directly to one of the client programs The clients are the native GUI client daisy or the user DLL tdcbase dll the command line interface qutau exe Labview VIs or other user written programs Daisy Server The Daisy Server daisysrv exe is invoked automatically by the GUI daisy exe The user lib tdcbase dll does not use the Daisy Server anymore As a consequence of this you can t work with different clients Daisy command line interface Labview VI simultaneously anymore quTAU Device USB 20 User DLL tdcbase dil Daisy GUI daisy exe Command Line Interface qutau exe Figure 4 Software concept of the quTAU Time to Digital Converter quTAU User Manual France United Kingdom Nordic Countries USA laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercompo
11. Detectors LASER COMPONENTS quTAU Time to Digital Converter User Manual Version 3 0 17 08 2012 qutools GmbH Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 info lasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Ltd Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 71 O1 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponents com Detectors LASER COMPONENTS Content Technical Specifications sicisctecsccbesteciachvepecxscshssdacescewansesstesdichesesGaudedcareancadbeltaiasheaheenvebeets 3 Changeling sepasar NE 4 Version 3 0 August 17 2012 sscsncsindsncsucsudsiisiisniavaitasdsldelastnisnstidsidshashasnutwrivcteuttees 4 Hints known limitations and problemS essssessesseessessresrssrsssrrsresrrrsrrsseeereesreesns 4 Version 2 0 June 5 2012 sis ssicsscsicsncsacvaconsdasdondendasiastastsntpitontouonisbinbipbiswawatwatsavens 4 General INFOMATION sessista eirinen siiin iie ei ea den 5 Bin WAGE ge ceccenetecdeecobcecedve
12. Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS c Burst Periods How many signals are inside a burst minimum 1 d Burst distance The period between two bursts should be bigger than Period x Burst Periods Measurements right hand side Tab Time Diffs 6 Write button file dialogue and format choice With these controls you can record time tags to a text of binary file a Choose an output file using the Ee button b Choose the format e decimal means human readable time tags first time tag then channel number from 1 to 8 separated by a comma e hex the same in hexadecimal format e binary in binary format 8 bytes time tag 2 bytes channel Intel format Little Endian lowest byte first c By hitting the Write button time tags are written into the specified file Hit it again to make it stop 7 Histogram and its settings This window shows the current time difference histogram without regard to the input channel You can set the update time by Exp Time Start and Width of the histogram etc In the box Histogram you can select which of the histograms should be displayed Global means that channels numbers are not regarded channels a b shows the histograms when channel a fired before b All histograms are measured simultaneously
13. Some examples e To record time tags for 10 seconds as text to the file textfile txt use qutau exe t 10 f textfile txt e To record time tags for 100 seconds into a binary file binfile bin use qutau exe t 100 F binfine bin e To record time difference histograms for 20 seconds with bin width 1 and number of bins 5000 to the file hist txt use qutau exe t 20 H hist txt b 1 B 5000 e To show the count rates with integration time 500 ms coincidence window size 10 bins 10 times 81 ps use qutau exe C e 500 c 10 user manual quTAU User Manual 08 14 V2 HW qutools qutau Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com
14. ance laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 info lasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 71 O1 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS histogram usually a large percentage of all events 17 Counts A The number of events from the first channel progressed for the histogram not only those who actually fell in to a histogram bin This should correspond to the count rate in the first channel First channel means the first one mentioned in the histogram choice 18 Counts B Same as Counts A but for the second chosen channel 19 Integration time How long has the histogram been recorded difference between last and first time tag used for the histogram Displayed in seconds Tab Time Tags On this tab you can see the time tags that are recorded by the user DLL 20 On the left you see an array with the last time tags that have been fetched from the device 21 The next column is the corresponding channel number 0 to 7 22 The chart shows the time tags time is on
15. e command line interface CLI has been updated and now utilizes the user DLL e The coincidence counting for the first 4 channels is done in the device so that the USB is not the bottleneck For the coincidence counting it is assumed that looking at the last 4 time tags only the first 4 channels are recalled here is sufficient This is true as long as there are never two events on the same channel within the coincidence time window e The counting mechanism for single count rates has been expanded to all 8 channels The coincidences are still evaluated inside the device for the first 4 channels only quTAU User Manual Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS General Information Bin width The width of adjacent inherent time bins of 81 Xa
16. fulfilled with it The sources are included too userlib source qutau main c It uses the same libraries as the previous example see above and communicates with the hardware directly via USB Hence you can t use it simultaneously with other clients To start this CLI open a command prompt via the Windows Start Menu or the shortcut Windows key r and input cmd go to the directory userlib source and call qutau exe Here are some of the parameters you can call it with to make it do what you want it to Please also use the parameter hh for more information Parameter Description h Outputs help menu only t lt time in seconds gt The program records data for at least this time Afterwards it closes itself and outputs the data as it has been told by other parameters All time tags are written to the given text file The format is Absolute time tag in native TDC bins approx 81 ps blank comma blank channel number from 1 to 8 On exit the program may say Time tag buffer was full n times This means that the time tags were written into the buffer faster than they were read at least partly Some of the time tags in between may have been lost Maybe using the binary writing function helps All time tags are written to the given binary file The format is 8 bytes of time tags in native TDC bins 2 bytes for the channel number 0 to 7 Intel byte order Little Endian lowest byte
17. lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS User DLL The user DLL tdcbase dll formerly quTAU wrapper dll and qutaubase dl1l can be used to interface customer specific software to the quTAU It is used for the LabView connection see below as well as by the CLI see before The header file can be found in inc tdcbase h and the location of the DLLis in userlib lib tdcbase dll The documentation as a Doxygen report can be found in userlib doc index html orinthe start menu LabView A Labview example see Figure 6 can be found in userlib labviewXX TDC simple vi of the Windows package or in the start menu If you need support for older Labview versions please let us know The Labview VIs are communicating with the device using the user DLL tdcbase d1l see above There are SubVis for basically all exported functions by the user DLL For documentation of the DLL functions please see above Parameter settings left hand side On the left hand side you can change some basic settings of the device like 1 Exposure Time ms This is the integration time for the counters in ms All experimental data on the right will be updated after this period 2 Input Termination You can choose the termination of the input signals to be 50 Ohms or 1 kOhm Using the wrong
18. mponents S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS Tab Histogram On this tab you can see time difference histograms calculated on the PC from the raw time tags This is already one in the user DLL so Labview only has to fetch and display it 9 Number of bins How many bins should the histogram have 10 Bin width How many native 81 ps TDC bins should one histogram be If this is set to e g 10 one histogram bin will be about 810 ps wide 11 Histogram reset You can choose whether you want the histogram to be reset each time you read it out i e after the Exposure Time 1 has elapsed or not If not you see a cumulative histogram You can choose this basically for all histograms separately 12 Reset all If you want cumulative histograms but reset them all at the same time use this button 13 Histogram channel select There are altogether 17 histograms calculated The fi
19. nents co uk www lasercomponents co uk Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS Graphical User Interface GUI daisy exe The quTAU comes with a native GUI see Figure 5 daisy exe that gives access to many features of the device You can find it in the start menu or in the main software directory Here the most important functions are described When you start the GUI for the first time the Windows firewall may ask you whether you want to allow the daisy server to open a port to the outside This is usually unnecessary so you can decline it Parameters left hand side 1 TDC Channel Enable You can activate each of the 8 channels separately Make sure the ones you want to use are ticked 2 Coincidence Window This value sets the half width of the coincidence window for the coincidence counting see below in generic TDC bins 81 ps 3 Exposure time This value determines for how long the coincidence counters see below integrate until they get read out The minimum is 1 ms 4 50 Ohm Input Term You can switch on or off the 50 Ohms input termination for all channels together If it is switched off the signal is directly input to the TDC chip with about 1kOhms im
20. oincidences 1 2 3 1 2 4 1 3 4 2 3 4 f fold coincidences 1 2 3 4 The integration time can be set with the e option standard is 100 ms Write histograms to text file The output looks like this First column is the bin number second bin end time in ns The next columns are the histograms between the different channels from 1 1 1 2 to 1 8 2 2 to 2 8 etc until 8 8 The negative bins in columns 1 2 for example mean those events when first channel 2 registered an event then channel 1 the positive vice versa So the histograms 1 2 and 2 1 are combined The values in those columns mean how many events have fallen into the time difference histogram bin Standard values for bin width are 10 native TDC bins i e 0 81 ns per bin and 100 bins i e a total of 81 ns for the whole histogram These values can be changed using the following command line parameters See also Hints known limitations and problems Sets the bin width of the calculated histograms see parameter H in native TDC bins approx 81 ps So b 10 means the histogram bin width will be 0 81 ns This does not influence the time tags in case they are output The maximum allowed is 100000 The standard value for this parameter is 10 Set the total number of bins of the histograms Standard value is 100 Maximum is 100000 Sets the self test channel bit mask This can be used to test the TDC or the software If the bitmask is 0 no events will appear at the in
21. on clicking Control Panel clicking System and Maintenance and then clicking Device Manager If you are prompted for an administrator password or confirmation type the password or provide confirmation 2 In Device Manager Figure 2 locate the device N Hands USB Device in the section USB Controller and then double click on it 3 Click the Driver tab and then click Update Driver and follow the instructions Use the driver from our website r g Gur le Manayer Datci Aktion Ansicht eM TLL RE Prozessoren Smartcard Leser lt gt Speichercontroller ll Systemger te Tastaturen s USB Controller Generic USB Hub Generic USB Hub Intel R 5 Series 3400 Series Chipset Family USR Intel R 5 Series 3400 Series Chipset Family USD N Hands USB Device USB Root Hub USB Root Hub USB Verbundyeral octane 1 w r Figure 2 Device Manager for driver update quTAU User Manual Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 70
22. onents GmbH Tel 49 8142 2864 0O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS Installation e connect the quTAU unit to a PC using a USB 2 0 cable connect the quTAU unit with a cattle plug to supply power switch on the quTAU Install the device driver Copy the software to a directory of choice zip archive or use the installer and follow its instructions Installation Update of the Device Driver Windows When you first switch on the device on a specific PC it will try to install the device driver automatically Please use the current device driver from the software package directory usbdriver In case you are not sure or have an old version of the device driver please update it using the following procedure You must be logged on as an administrator to perform these steps 1 Open Device Manager by clicking the Start butt
23. pedance 5 TDC Self Test For testing the quTAU can generate periodic signals and send them to the various input channels of the device This feature can be controlled here The general idea is that all channels do the same apart from some intrinsic timing differences between the channels There are always bursts of some signals then there is a pause then another burst comes a Channel Here you can set which of the channels should be fired upon with self test signals b Period The time between signals inside a burst minimum 40 ns Data Loss Indicators 150 Hold TOC Channel Enable vi 2 W3 via Parameters Conddenue Window Exposure Time 50 Ohm Input Term TDC Self Test Channel 9 3 Period Burst Periods J Burst Distance 6us Figure 5 Graphical user interface GUI Daisy gives access to the main features of the device Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 1 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 info lasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA
24. put of the TDC Otherwise the bitmask will determine which of the channels fire 1 means channel one only 2 channel 2 only 3 channels 1 2 4 channel 3 only etc There will always be bursts of 2 per channel with H lt histogram file name gt b lt bin width in TDC bins gt B lt bin count gt S lt channelmask gt Version 3 0 Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents r www lasercomponents fr United Kingdom Laser Components UK Ltd Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 71 O1 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS a delay of 80 ns the time between two bursts is 20 us so we expect one peak at 80 ns one at 19 92 us and possibly one close to zero when more than one self test channel is active When this parameter is not set it doesn t change the previous settings So you can e g set these values using the Daisy and they won t be changed unless you use the parameter S
25. rrnvrrrnnrronvrrnnrrrnnvrnnvrnnnr 13 Command Line Interface II qutau exe rrnrrrrnrrrnnrrrrnrrrnnrrrnnvrrnrrrrnnrrenvrrnnvrrnnnrnnnnrnnnn 14 Oo 16 og BEE MM EE S pusteaeees 16 quTAU User Manual 2 Germany amp Other Countries France United Kingdom Nordic Countries USA Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com Technical Specifications Parameter Number of input channels Input pulse high level Input pulse low level Input pulse width Input pulse separation same channel typ Input impedance choose either Max event rate one channel counting mode Max event rate all channels counting mode Max event rate all channels time tag mode Bin width least significant bit equivalent
26. rst one is channel independent i e a histogram is made regardless of the channel number The other ones are all channel dependent from chanel 1 with channel 1 to channel 1 with channel 2 etc 14 Data Count This number gives a total of events that have fallen into this histogram 15 Too small The number of events that were too small to be used for the histogram should be 0 16 Too large The number of events that were too big to be shown in the E QUTAU sm le vi ek f de gdt Yew project Qperate Tools Window Help a ein i aw Counter Histogram Time Tros Exposure Time fms gin Number of bins Bin width 84 p bins Histogram reset Reset all Histogram channel setet om 6m gt omme Input Termination fp Os Lk0hm Sopp o LJ 0 o Self test 3 Channel Mask 3 gg 3 p Burst Distance 80 ns H z ry 25 7 x 7 2 o Error Out 2 1 status Hr A 5 e i soure x 0 p 7 7 E 2 Dr p p 1 1 p 1 1 1 p p 1 1 1 1 va sto 2454 2456 2458 2860 2462 2464 2466 2460 279 2472 2474 2476 2478 2400 2482 2804 2496 2439 sP prera a se Data Count TooSmal Toolarge Counts A Counts B Integration time fs sossa fo Is 50486815 59484485 106 452 Evaluation lt i Figure 6 Labview VI example quTAU User Manual Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 0 Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com Fr
27. s first Sets the coincidence window for the internal coincidence counters first 4 channels in native TDC bins approx 81 ps Standard value is 100 bins i e 8 1 ns Sets the exposure or integration time for the f lt time tag file name gt F lt binary time tag file name gt c lt coincidence window in TDC bins gt e lt exposure time in ms gt quTAU User Manual Germany amp Other Countries Laser Components GmbH Tel 49 8142 2864 O Fax 49 8142 2864 11 info lasercomponents com www lasercomponents com France laser Components S A S Tel 33 1 39 59 52 25 Fax 33 1 39 59 53 50 infoQlasercomponents fr www lasercomponents fr United Kingdom Laser Components UK Lid Tel 44 1245 491 499 Fax 44 1245 491 801 info lasercomponents co uk www lasercomponents co uk Nordic Countries Laser Components Nordic AB Tel 46 31 703 71 73 Fax 46 31 703 7101 info lasercomponents se www lasercomponents se USA Laser Components USA Inc Tel 1 603 821 7040 Fax 1 603 821 7041 info lasercomponents com www lasercomponenis com Detectors LASER COMPONENTS internal counters first 4 channels in ms The counters always count for this period Standard value is 100 ms C Output the last counter values to standard output when the program terminates They come out in the following order Singles channel 1 to channel 8 2 fold coincidences 1 2 1 3 1 4 2 3 2 4 3 4 3 fold c
28. ssassestcabeatea estcaveed fice cclacdsdsscs sai a Ea a EE EAE Aa EEA EREET 5 Time tags Dit Width cesserait ienaa aaae in aiiai 5 NESEN EU EE RER 5 LINUX SUPPOME escuan nsee oenas naa SNEEN EEE EES AEE 5 WS HAN ATION EE A 6 Installation Update of the Device Driver Windows c ccccccccescessesseesseeeceeeeseees 6 Firmware Update yc iccdescpsesseasepsvnchesvessnsinadsasnseansedSatassecsasticnsdntceucetsntenventenisesceesnestaseeye 7 Software Concept asrorini rinneas AERE NEE ESE EE EE E EEEE NERES 8 BEEE A E 8 Graphical User Interface GUI dai Sy e X mmmmmmmmeeerererereeererrreerrerrsernerrseeseneresnrenr 9 Parameters left hand side sssini earings iaiaaeaia 9 Measurements right hand side rrrrnvrrrorrrnnvrnorvrrnnrrnnnvrrnnrrnnverenvrrnnvrennnssnvrsennennn 10 Tab Time DifS sonsaina anodo asied aioa ae a eE EESE 10 Tab Coincidence Counters rnnrnnnnorrnrnnrnnvrnnnnvnnenrnnnvrnennensnvasennenensasnnensrnnsnenseren 10 Tab Aistory Zaisuaasaid sneket ep EER 10 IE og SE EE 11 VE EE 11 Parameter settings left hand side srrrnrrrrnvrrorvrrnnrrnnnvrrnrrrnnvvrenvrrnnvrennnrsnnrrsnnennn 11 Measurement area right hand Side ccscccssccesscessscceseeeseccssecesecseesssseeseseeessees 11 TaD COUNTER uansaseoortseeossskernSeuesen dead 11 Tab Histogram seriinin a e EN EE ATE E Ea 12 Tab Time Tags aeaea a ar aae e a Ea Ea Enae ENE 13 Command Line Interface I exampleO0 exe nrrsrrrnnrrrrnrrrnnrrrnvr
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