LUCIFER Mask‐ and Cabinet‐Exchange User Manual
Contents
1. OK in 3 gate open Verify OK in 4 transfer Check that the transfer direction of 4 transfer is cabinet to Lucifer Press run pre check button on line 5 A window will pop up indicating the state of LUCIFER Check that the symbol in the first line is grey If the symbol in the first line is red you can use the decision tree to diagnose the reason for the failed pre check and accordingly correct the state Most likely you will need to contact remote support from Garching In any case close LUCIFER gate Close pre check window Verify OK in 5 run pre check 8 Press start cabinet transfer a b e f You can follow the progress of the cabinet exchange in the sequence window At the end of the sequence a post condition check will be executed and an accerdinga corresponding window will pop up Check that the symbol in the first line is grey If the symbol in the first line is red you can use the decision tree to diagnose the reason for the failed post check and accordingly correct the state Most likely you will need to contact remote support from MPE Garching Close the post check window Verify OK in 6 start cabinet transfer at the end of the sequence 9 If for some reason you have to manually stop all motions you need to manually recover from the state using the MOS engineering panel Thi2. a This will open the configuration editor b Disable all masks of the cabinet slot 10 32 c Press Commit Do not kill the window otherwise the Cabinet Exchange Procedure GUI will not be able to successfully finish 11 While you are configuring the mask another person should already close the LUCIFER gate 5 13 Venting the interface flange To vent the interface flange 1 Close the LUCIFER gate by pressing the Gate Lucifer close button You may need to repeat this several times The according corresponding Gate Lucifer LED indicators will change from open to close Close the auxiliary cryostat gate by pressing the Gate Lucifer Open button You may need to repeat this several times The according corresponding Gate Auxiliary LED indicators will change from closed to open Stop the evacuation of the vacuum interface and the auxiliary cryostat by switching off the Evacuation VI amp Cryostat button The light of the button will turn off Stop the scroll pump by switching off the Scroll Pump button The light of the button will turn off Press the Venting Vacuum Interface interface button to vent the interface a The aceerding corresponding indicator light of the button turns on b The green LED Venting VI starts blinking at 5Hz Hz to indicate the waiting period of 4 min to let spin down the turbo molecular pump c After the waiting period the venting val
3. gate and the LUCIFER gate a The light of the button will turn on b The controller will wait for the scroll pump to evacuate the vacuum interface for a pressure better than 10 mbar and then switch on the turbo pump c The aceoerding coresponding ACCEL LED indicator of the Pump Vacuum Interface turbo controller will turn on until the turbo pump reaches it nominal speed d The aceerding corresponding NOMINAL LED indicator of the Pump Vacuum Interface Cryostat turbo controller will turn on As soon as the pressure of the vacuum interface falls below 10 mbar the turbo pump of the auxiliary cryostat will automatically start e The correspondingaceerding ACCEL LED indicator of the Pump Auxiliary Cryostat turbo controller will turn on until the turbo pump reaches it nominal speed f The correspondingaccerding NOMINAL LED indicator of the Pump Auxiliary Cryostat turbo controller will turn on Then open the gates 1 Wait until the pressure of the auxiliary cryostat and the vacuum interface is below 10 mbar a Toggle Head Select on the vacuum meter to switch between the two gauges b Check that the Evacuation P lt 10 LED indicator is on 2 Open the auxiliary cryostat gate by pressing the Gate Auxiliary Open button You may need to repeat this several times in particularly when the gate was not used for some time The accerding corresponding Gate Auxiliary L
4. one for the control electronics at the back of the auxiliary cryostats Check state of auxiliary cryostats a Cryostats are warm red temperature display of the OMEGA controller the green display is for the set point b Cryostats are still evacuated with a pressure below or around 10 mbar pressure gauge head 1 Remark gauge head 2 is for the vacuum interface to LUCIFER c One cryostat is loaded with the old magazine ferom the last cabinet exchange indicated by the active Magazine in LED and its thermal bridge is closed indicated by the Thermal bridge closed LED active d The other cryostat is empty Magazine in LED off and its thermal bridge is open indicated by the Thermal bridge open LED active e The rails of the auxiliary cryostats are adjusted for a cabinet exchange with a cold LUCIFER instrument indicated by the active cold Pos LED of auxiliary cryostat 1 the indicator of auxiliary cryostat 2 is faulty and must be ignored Question Will that be fixed in a near future ___ Formatted Font Italic Remark the rails of the auxiliary cryostats are differently aligned if the cabinet exchange Formatted Indent Left 1 is done with a warm LUCIFER instrument This operation is only necessary for heavy maintenance of the instrument f The gates of the auxiliary cryostats are closed indicated by the Gate Auxiliary closed LED active Check also by visual inspection of
5. 0732 MPIA engel2 home engineer Masks_Ims_file Feb2010 mos1 42 engel2 Ims 931738 MPIA engel3 home engineer Masks_Ims_file Feb2010 mos1 43 engel3 Ims 932010 MPIA engel4 home engineer Masks_Ims_file Feb2010 mos1 44 engel4 Ims 932129 MPIA engel5 home engineer Masks_Ims_file Feb2010 mos1 45 engel5 Ims 911548 MPIA W3KIt14 home engineer Masks_Ims_file Feb2010 mos1 49 engel9 Ims 925727 MPIA W3KIt15 home engineer Masks_Ims_file Feb2010 mos1 51 W3KIt15 Ims 925653 MPIA 255 home engineer Masks_Ims_file Feb2010 mos1 57 S255 ms 905333 Nancy 255 newSW home engineer Masks_Ims_file Feb2010 mos1 97 newArjan ms 3 The auxiliary cryostats are in the instrument laboratory 4 You have all tools available a Check content of the toolbox at the bottom of each of the auxiliary cryostat mounts A clean desk panos A size 2 screwdriver Some alcohol ethanol for cleaning of the new masks The plastic boxes labeled MOS MASKS FRAMES MOS LAPTOP CAMERA The plastic box with the MOS laptop and LUCIFER webcam equipment To prepare the removal from the old cabinet from the auxiliary cryostat 1 Hook up the power supply of the auxiliary cryostat cable in toolbox at the bottom of the cryostat Hook up the pressurized air pipe also in the toolbox Connect cable P103 from instrument electronics to J103 connector on the panel for the power and pressurized air supply Switch on both circuit breakers one for scroll pump
6. ED indicators will change from closed to open 3 Check again that the pressure of the auxiliary cryostat and the vacuum interface is below 10 mbar a Toggle Head Select on the vacuum meter to switch between the two gauges b Check that the Evacuation P lt 10 LED indicator is on 4 Open the LUCIFER cryostat gate by pressing the Gate LUCIFER Open button You may need to repeat this several times in particularly when the gate was not used for some time The according corresponding Gate LUCIFER LED indicators will change from closed to open 5 Check pressure of the LUCIFER cryostat The pressure should not raise above 10 mbar when opening the gate Monitor the LUCIFER pressure repeatedly while the gate is open 5 12 Computer controlled cabinet transfer from LUCIFER to auxiliary cryostat The actual cabinet transfer from LUCIFER to the auxiliary cryostat is controlled by the Cabinet Exchange Gui see 4 9 Verify OK in 1 All software services running Verify OK in 2 auxiliary cryostat connected Check that aux ID shown in 2 auxiliary cryostat connected is the same as the one of the auxiliary cryostat mounted to LUCIFER remark the two auxiliary cryostats require a different software configuration Verify OK in 3 gate open Verify OK in 4 transfer Check that the transfer direction of 4 tran
7. LUCIFER Mask and Cabinet Exchange User Manual Revision 0 11 including update from Nancy Date 31 01 2010 Author Frank Eisenhauer to be replaced by the final editor 1 Table of Content E E e eE A A E A a A A AET A 1 2 Scope of theimanual reenn ele ee RE eee A E ead 3 3 Warning Dangeriof LitCs sicicccciscs ccrvacarcacs erred tarteeteern venient asiv N ted a nes 3 Ae OV OIC Wiis E E E E trust votsbsaeeden cieedses 3 5 Detailed description of the individual Steps ceceesecsceeseeseceseeeseceaeceeeeeaeceeeeeeeeeesseeeeeeaeseaeeseeeaeeeaes 4 5 1 Preparing the mask and cabinet Exchange ccccceccesceeseeeseceseeeeeceeeeeeeceeeseeeaeeeaeesaeenaeeeseseaeeeaees 4 5 2 Venting th auxiliary CryOstats vic sscsscrtcctecnscesrtontenscdeediannatanninii aa ia a aaa 6 5 3 Removal of the cabinet from the auxiliary cryostats ccccccssscesssecesseeeseecssseeesseeesseesssseessaeeeses 7 5 4 MENAS o eIn A E A E O E E R E A E 11 5 5 Loading the cabinet to the auxiliary CryOStat cccccecececceseceeeeeseeeaeceeeeeeeeeaeseeesaeeteeseeeeeseaeees 14 5 6 Evacuation of the auxiliary CryOStats ccccccccsceseeseeceseeeeeeeseceeeeeeeceaesececeeesseeseecaeseaeeeaeeeaeeeaeeeee 15 5 7 Cooldown of the auxiliary CryOStats cccescceseeseceeeeeeeseeecaeeeaeeeaeeeaeeeaeceaeseaeseeeseeesseeseesneeeeeeeaeees 16 5 8 Transport of the auxiliary cryostats up to the level 6 00 ceececeeseceeeeeseeeeeeeeeeeeeseneseeeeneeeeneneeeee
8. air to the auxiliary cryostat panel see also 4 1 power cord and tubes also in the toolbox below the auxiliary cryostat 12 Connect the two cables P102 and P103 from the auxiliary cryostat to the LUCIFER control electronics sockets J102 and J103 P p 13 Connect the cable P19 from the auxiliary cryostat to the J19 socket in the back of the MOS control electronics 14 Disconnect the two cables P115 and P116 from the auxiliary cryostat 15 Instead connect the two cable P15 and P16 coming from the MOS control electronics to the sockets J115 and J116 close to the gate of the auxiliary cryostat You will find the cables P15 and P16 tied to the LUCIFER cryostat 16 Connect the second line of the pressurized air to the LUCIFER cryostat panel next to the sockets J105 and J106 see picture of step 7 5 11 Evacuating the interface flange and opening the gates To evacuate the interface flange 1 Switch on both circuit breakers one for scroll pump one for the control electronics at the back the auxiliary cryostats 2 Press the Scroll Pump button on the auxiliary cryostat control electronics to start the scroll pump The according corresponding button light turns on 3 Verify that the Evacuation Pay gt Py LED indicator is off otherwise re evacuate auxiliary cryostat see 4 6 4 Press the Evacuation VI amp Cryostat button to start the evacuation of the vacuum interface between the auxiliary cryostat
9. been inserted properly and the mask seen is indeed the one indicated in the configuration file step 7 of cabinet exchange Careful Do not put all 23 new masks in the focal plane at once that would heat up the MOS unit too much Five to 7 masks at a time is fine but then let the unit cooldown for a while an hour or two Formatted Font color Red
10. ccording programs on the auxiliary cryostat control panel see also 5 6 5 Switch on the scroll pump by pressing the Scroll Pump button switch The light of the Scroll Pump button must turn on 6 Start turbo molecular pump by pressing the Evacuation Cryostat button a The light of the button will turn on b The controller will wait for the scroll pump to evacuate for a pressure better than 10 mbar and then switch on the turbo pump c The aceerding corresponding ACCEL LED indicator of the Pump Auxiliary Cryostat turbo controller will turn on until the turbo pump reaches it nominal speed d The aceerding corresponding NOMINAL LED indicator of the Pump Auxiliary Cryostat turbo controller will turn on 4n 7 Wait for the pressure to be below 10 mbar The according Evacuation P lt 10 will turn on 5 23 Warming up the auxiliary cryostat To warm up the auxiliary cryostat Keep pumps running Check that the temperature set point green display of the OMEGA temperature controller is set to 20 C 3 Turn on the heater by switching on the Heater On switch o The Warming up LED indicator will go on o The OMEGA controller will automatically warm the cryostat to the set point temperature o The Heater 1 to Heater 3 LEDs will indicate if the heaters are on 4 Wait for about 12 hours te warm upthe cryestatfor the cryostat to warm up 5 Check that the
11. cryostat temperature red display of the OMEGA controller is at or above the set point green display 6 Switch off the Heater On switch The Warm up LED indicator and the Heater 1 to Heater 3 LED indicators if currently active will turn off 7 Switch off the cryostat evacuation by releasing the Evacuation Cryostat button The according corresponding light of the button will go off 8 Stop the scroll pump by releasing the Scroll Pump button The accerding corresponding light of the button will go off Formatted Font Italic 5 24 Storing the auxiliary cryostats The auxiliary cryostats are best stored when 1 Warm see 5 23 for warm up sequence 2 Evacuated see 5 6 and 5 22 for evacuation sequence Then 1 Switch off the power supply for the control electronics and the scroll pump at the back of the back of the E cabinet 2 Unplug the power supply unplug the pressurized air Store all accessories in the dedicated tool boxes at the bottom of the auxiliary cryostats 5 25 Testing the new masks Once the mask configuration has been updated using the LUCIFER observer session move masks into the focal plane using the Instrument Control GUI This can easily be performed by the LBTO instrument scientist s since this is the same thing as when observing Taking through mask images N3 75 camera and Br _ gam filter te bedene Is a good way to check that the mask has
12. cryostats down to the laboratory The transport of the auxiliary cryostats down to the laboratory follows the reverse sequence of 5 8 Bring down the auxiliary cryostat crane support to level 5 using a trolley and the elevator Bring down the auxiliary cryostat to level 5 using the elevator Hook auxiliary cryostat crane support structure to the telescope crane UM Nie Hook auxiliary cryostat to the support structure a On the side with the gate adjust the length of the chain by placing the according hook in the 9 chain element b On the other side no adjustment is needed Lift down the cryostat through the hatch to level 1 Bring down trolley to level 1 using the elevator Place auxiliary cryostat back on its trolley Push auxiliary cryostat back to laboratory 0 COA OY On Store auxiliary cryostat crane support structure next to the wall below the hatch 5 22 Re evacuationPumping of the auxiliary cryostats To re evacuate the auxiliary cryostats first prepare the cryostats see also 5 1 1 Hook up the power supply of the auxiliary cryostat cable in toolbox at the bottom of the cryostat Hook up the pressured air pipe also in the toolbox Connect cable P103 from instrument electronics to J103 connector on the panel for the power and pressurized air supply 4 Switch on both circuit breakers one for scroll pump one for the control electronics at the back the auxiliary cryostats And then evacuate the start the a
13. ct the power supply and the pressurized air from auxiliary cryostat panel Remove the clamps from the vacuum flanges Pull back the auxiliary cryostat from the LUCIFER gate Remove O ring from the LUCIFER vacuum flange Store all accessories in the toolbox below the auxiliary cryostat Lift auxiliary cryostat down to level 6 using the crane Watch out for the cabling Put back plastic cover on the vacuum flange of the auxiliary cryostat 5 15 Mounting the auxiliary cryostat with the new magazine Mounting the auxiliary cryostat with the new magazine follows exactly the same sequence as for the empty auxiliary cryostat in 5 10 Please follow instructions given in 5 10 5 16 Evacuation of the interface flange and opening of the gates Please follow instructions given in 5 11 5 17 Computer controlled cabinet transfer from the auxiliary cryostat to LUCIFER The computer controlled cabinet transfer from the auxiliary cryostat to LUCIFER is almost identical to the insertion of the cabinet from ia LUCIFER to the auxiliary cryostat as described in 5 12 and is controlled by the Cabinet Exchange Gui see 4 9 Verify OK in 1 All software services running Verify OK in 2 auxiliary cryostat connected Check that aux ID shown in 2 auxiliary cryostat connected is the same as the one of the auxiliary cryostat mounted to LUCIFER 1 2 3 4 5 6 T a b c d e Verify
14. e 16 5 9 Preparing the computer setup at the instrument platfOrM ccceeceeeeeseeeteeeeeeeeeeeeeeeeeeeeeeeeeens 17 5 10 Mounting the empty auxiliary cryostats to LUCIFER ccccceceeseeeseceeeeeeceeeeeeeeneeseeeeeeeaeeeaees 1918 5 11 Evacuating the interface flange and opening the gates c cscecsceseseseceteceeeseeeteeeeseeeeeeeaees 2423 5 12 Computer controlled cabinet transfer from LUCIFER to auxiliary cryostat cceeceeeeeeeeee 2524 5 13 Venting the interface flange iorsin e tence ieteceste eae eens 2625 5 14 Removing the auxiliary cryostat from LUCIFER c ccccccscceseeeeeceseeeseeeeecneeseeecseeeaeeeaeeseeeaeensees 2726 5 15 Mounting the auxiliary cryostat with the new MAagaZiNe ecceeceeeceteeeeeeeeeeeeteeeeseeeeeeeaees 2827 5 16 Evacuation of the interface flange and opening of the gates cccccsceeseeeeeeteeeeeseeteeeeeees 2827 5 17 Computer controlled cabinet transfer from the auxiliary cryostat to LUCIFER s ceseee 2827 5 18 Venting the interface flange ceeccscceseeseceeeeeseeeeeeeeeceeecaeeeseeeaeceaeeeaeeeseceaeseeeseaeseaeseeseneeseees 2928 5 19 Removing the auxiliary cryostat from LUCIFER ccscccscceseeeeeceeeeseseeeceeeseeeeeeeaeeeaeeseeeaeeeeees 2928 5 20 Clearing the instrument platform ccecsceeseeeseceeeeceeeeeceeeceeseesaeecaeeeaeeeaeeeseseaeseaeeeaeeeaetnens 2928 5 21 Transport of auxiliary cryostats down to the laboratory cceeceesceceeeneeee
15. e cabinet this is where the long lever arm for the cabinet drive is mounted 11 Note down the cabinet slot id of the frame If you happen to need spare screws or spare beryllium springs you will find them in the plastic box labeled MOS MASKS FRAMES 5 5 Loading the cabinet to the auxiliary cryostat Before inserting the cabinet back into the auxiliary cryostat check 1 The mask id frame id and cabinet slot id match the entries of the Excel Sheet 2 All masks are well aligned with each other 3 Every mask is sitting well in its slot 4 The auxiliary cryostat control electronics is still in Venting Cryostat Mode a The accoerding corresponding switch is light up b The Venting Cryostat LED indicator is permanently on not flashing 5 The Gate Lucifer open LED indicator is on if not toggle the aceerding corresponding switch on the power supply panel see 4 1 Then insert the cabinet back in the auxiliary cryostat p Attach the big aluminum frame with the cabinet to the gate following the instructions in 4 3 m Check the proper alignment of the frame following the instructions in 4 3 3 Make sure that the thermal bridge is open a The Thermal Bridge open LED indicator is on b Visual inspection through the gate 5 Move magazine eutefthe audliaryeryestat inte the aluminum framefrom the aluminum frame into the auxiliary cryostat a One person should watch
16. eeeeeeneteeeeneeeeeeeaees 2928 5 22 Re evacuation of the auxiliary CryOStats c ceceesceseceeeceeeceeeceneeseeceeeceeeaeecaeeeaeeeaeeeaeeeaeseeees 2928 5 23 Warming up the auxiliary cryostat ccccecceseeseceeeceeeceeecececeeceeeeseecaeeeaeeeaeeeeeseaeseaeseeeeeaetenees 3029 5 24 Storing the auxiliary CryOstats cceeccesceseceeeeeeceeeeeeecenecaeeeeeeaeeeaeecaeeeaeeeaeseeeeeaeseaeeneeeeeenenees 3130 5 25 Testing the MEW masks wnciec tssiessscsssassustoadsssescesnstoadinceddeeesdesisecyesivsscubesacsesiegeseadheayi Eoaea Eat 3130 2 Scope of the manual This manual describes step by step how to exchange the masks and cabinets ef of the LUCFIER instrument The manual should be updated on a regular basis by the instrument team to always include the latest hints and changes in the procedure 3 Warning Danger of Life 1 Never grab through the gates of the auxiliary cryostats The gates are electronically controlled by the instrument electronics and a malfunction or maleperatior improper operation might accidentally close the valve Warning the handling of liquid nitrogen is hazardous and must only be done by trained and qualified personnel 4 Overview The mask and cabinet exchange follows the below sequencesequence below COS Oe oe aN a NNNPRPRP PPP RPP RP RB N e OWO WON DU PWN FP OO Preparing the mask and cabinet exchange Venting the auxiliary cryostats Removal of the cabinet from the auxiliary cr
17. ermany In the future the mask will be cut in Tucson and delivered with the regular LBTO transport You have received the Excel list with the mask ID numbers the name of the institutes using the masks in their observing run the mask names and the path to the source Ims files You need to fer a eill in the frame number and cabinet slot where the masks are installed The later information wil be needed at a later stage of the cabinet exchange The following figure shows an example of such an excel file Mask ID Cab SlotFrame Institute mask name Ims filename 934121 MPE M106GOODSN 4 home engineer Masks_Ims_file Feb2010 mos1 106 GOODSN Ims 975013 MPE M108GOODSN 1 home engineer Masks_Ims_file Feb2010 mos1 108 GOODSN Ims 955603 MPE M111GOODSN 2 home engineer Masks_Ims_file Feb2010 mos1 111 GOODSN ms 965647 MPE M112GOODSN 3 home engineer Masks_Ims_file Feb2010 mos1 112 GOODSN Ims 925659 MPE M118GOODSN 6 home engineer Masks_ ms_file Feb2010 mos1 118 GOODSN Ims 971238 MPE M122GOODSN 5 home engineer Masks_Ims_file Feb2010 mos1 122 GOODSN Ims 973949 IAP MOO2laecosm2 home engineer Masks_Ims_file Feb2010 mos1 2 laecosm2 ms 975807 IAP MOO3laecosm2 home engineer Masks_Ims_file Feb2010 mos1 3 laecosm2 ms 925724 MPIA a9011 home engineer Masks_Ims_file Feb2010 mos1 38 a9011 Ims 925951 MPIA a9012 home engineer Masks_Ims_file Feb2010 mos1 39 a9012 Ims 930135 MPIA a9013 home engineer Masks_Ims_file Feb2010 mos1 40 a9013 Ims 93
18. hol and cleaning paper at hand Pe Ne Have the Excel Sheet or a printout at hand The exchange of the individual mask follows the subsequent sequence 1 Put the mask in front of you such that a The screws of the frame look up b The ear this is where that MOS robot grabs the mask is pointing towards you c The mask ID is to the top left and readable not mirrored 9 Beispiel fiir korrekten Einbau Unscrew the frame Remove old mask and put it in the Mask Archive Folder Check that all four alignment pins are still in place and have not loosened If necessary gently press them in again Clean the new mask on both sides with alcohol Place the new mask in the frame so that a The black side faces up and the shiny side is down b The mask ID is to the top left opposite to the ear and readable not mirrored Screw frame Check that the mask a Has some little play 0 1 mm in the frame by gently knocking the frame and listening for a snare drum like sound b No screws and pins stick out on both sides because this could cause blocking the MOS Note down the frame ID laser printed on the side of the frame in the Excel sheet 10 Put the mask back in the cabinet a Such that the shiny side of the mask faces the front of the cabinet this is where the cabinet is first moving out the auxiliary cryostat b The black side of the mask with the frame screw looks to the back of th
19. idge by pressing the Thermal Bridge open close switch up open until the Thermal Bridge LED indicator uras changes from closed to open 3 Visually check that the thermal bridge is really open N 4 Move magazine out of the auxiliary cryostat into the aluminum frame a One person should watch the motion the other person should operate the control panel Switch the Magazine in off out switch from off to out As soon as the cabinet starts moving the Magazine in LED goes off indicating that the cabinet is of the limit switch inside the auxiliary cryostat Watch the cabinet move out the auxiliary cryostat in particular when it is moving onto the white slide of the aluminum frame e Ifthe cabinet gets stueck at the transition to the white slides of the aluminum frame gently lift the cabinet by hand f When the cabinet reaches the end of the motorized spindle gently pull the cabinet by hand into the aluminum frame Do not grab through the holes of the cabinet but grab it below on its main structure 1DF A z g Switch off the Magazine in off out switch to stop the rotation of the spindle h Keep cabinet in the aluminum frame also for the subsequent mask exchange The cabinet is rather easily deformed and the aluminum frame provides a proper protection 5 4 Mask Exchange To exchange the masks Work on a soft underlay Wear latex gloves Have alco
20. iquid nitrogen spills out from the exhaust pipe Close valve at the LN2 canister Disconnect the LN2 canister from the auxiliary cryostat 10 Put cup on the LN2 Input pipe 11 As soon as the nitrogen exhaust has calmed down put the overpressure valve Important To avoid icing inside the cryostat Danger of Life e Never leave LN2 input pipe open e Always put the overpressure valve on the exhaust pipe as soon as the exhaust has calmed down 12 Repeat steps 2 10 until the auxiliary cryostat is below about 180 C read display of the OMEGA controller When the cryostat is fully cooled down the typical LN2 hold time is about 12 hours 5 8 Transport of the auxiliary cryostats up to the level 6 For the transport of the auxiliary cryostats you first need to stop evacuation and power down the cryostat 1 Stop evacuation by switching off the Evacuation Cryostat button The accerding corresponding button light must go off Stop scroll pump by switching off the Scroll Pump button The correspondingaccerding button light must go off Wait for 5 minutes to let the turbo pump spin down Switch off power supply for the scroll pump and the control electronics on the back of the E cabinet Unplug the power supply and put power line in the tool box at the bottom of the cryostat Unplug the pressurized air and put pipe into the tool box at the bottom of the cryostat Unplug P103 frome the power supply panel and fi
21. ressure above a few 100 mbar ii Verifying that there is no remaining sucking sound at the venting valve otherwise wait for a few more minutes f Open the gate by pressing the Gate Auxiliary Open button You may have to press and release the button several times especially if the gate has not been used for some time The Gate Auxialiary LED indicators will changet from closed to open g Keep the Venting Cryostat program running this prevents that you accidentally close the gate because this mode disables the Cryostat Auxiliary Open button Repeat the same procedure for both cryostats Even so the empty cryostat does not necessarily needs to be vented but could be directly evacuated and cooled see later to receive the cabinet from LUCIFFER the full venting evacuation and cool down procedure will provide a system level test to guarantee the proper functioning for the subsequent cabinet exchange 5 3 Removal of the cabinet from the auxiliary cryostats To remove the cabinet with the old masks from the auxiliary cryostat 1 Attach the big aluminum frame to the gate a The frame is heavy therefore this should be alwaysalways be done by two persons f ye f t b Check the proper alignment of the frame i The copper attachment points should be aligned with the grooves on the flange ii The black spacers should nicely fit the mount of the rails 2 Open the thermal br
22. s will usually require remote support from MPE Garching 10 Press Configure Masks in line 7 of the GUI a This will open the configuration editor b Enter the mask ID and enable the according slots of the cabinet according to the Excel Sheet You need not to enter all information from the Excel Sheet but you can do that later form the telescope control room using the MOS engineering GUI c Press Commit Do not kill the window otherwise the Cabinet Exchange Procedure GUI will not be able to successfully finish 11 While you are configuring the mask another person should already close the LUCIFER gate 5 18 Venting the interface flange Please follow instructions given in 5 13 5 19 Removing the auxiliary cryostat from LUCIFER Please follow instructions given in 5 14 In addition 1 Put plastic cover back on the LUCIFER vacuum flange 2 Remove interlock from the instrument rotator 5 20 Clearing the instrument platform 1 Stop the software and shut down the MOS laptop a Close the Cabinet Exchange Gui window b Exit the NX Session by selecting Log Out engineer from the Launch button at the bottom left of the Desktop c Shutdown MOS Laptop by selecting Herunterfahren from the Windows Start button Disconnect power supply and LAN cable and put everything back to the MOS LAPTOP CAMERA plastic box 2 Clean up and remove any items from instrument platform 5 21 Transport of auxiliary
23. sfer is cabinet to AUX check naming hor ope Press run pre check button on line 5 a Awindow will pop up indicating the state of LUCIFER b Check that the symbol in the first line is grey c Ifthe symbol in the first line is red you can use the decision tree to diagnose the reason for the failed pre check and accordingly correct the state Most likely you will need to contact remote support from Garching In any case close LUCIFER gate d Close pre check window e Verify OK in 5 run pre check 8 Press start cabinet transfer a You can follow the progress of the cabinet exchange in the sequence window b At the end of the sequence a post condition check will be executed and an accerdinga corresponding window will pop up c Check that the symbol in the first line is grey If the symbol in the first line is red you can use the decision tree below to diagnose the reason for the failed post check and accordingly correct the state Most likely you will need to contact remote support from MPE Garching e Close the post check window f Verify OK in 6 start cabinet transfer at the end of the sequence 9 If for some reason you have to manually stop all motions you need to manually recover from the state using the MOS engineering panel This will usually require remote support from Garching 10 Press Configure Masks in line 7 of the GUI
24. sing the Scroll Pump button switch The light of the Scroll Pump button must turn on 6 Start turbo molecular pump by pressing the Evacuation Cryostat button a The light of the button will turn on b The controller will wait for the scroll pump to evacuate fora pressure better thandown to a pressure below 10 mbar and then switch on the turbo pump c The according corresponding ACCEL LED indicator of the Pump Auxiliary Cryostat turbo controller will turn on until the turbo pump reaches it nominal speed d The aceerding corresponding NOMINAL LED indicator of the Pump Auxiliary Cryostat turbo controller will turn on 7 Wait for the pressure to be below 10 mbar The according corresponding Evacuation P lt 10 will turn on 5 7 Cooldown of the auxiliary cryostats The cooldown of the two auxiliary cryostats i 2 Takes about 24 hours Requires about 200 liter of liquid nitrogen To cooldown the auxiliary cryostats 1 CON AMR WH Make sure that the cryostat heater is switched of the aceerding corresponding Heater ON switch must be off and the Warm up LED indicator off Pressure up the LN2 canister to 40 PSI Remove the cup from the LN2 input pipe of the auxiliary cryostat Remove the overpressure valve from the LN2 exhaust pipe Connect the LN2 canister to the auxiliary cryostat Open the valve at the LN2 canister Fill the auxiliary cryostat until l
25. stat electronics prepare cabinet exchange transfer cabinet to auxiliary un pr tart 5 10 Mounting the empty auxiliary cryostats to LUCIFER Before continuing with the software controlled cabinet transfer the auxiliary cryostat must be mounted attached to LUCIFER Check that the instrument rotator is at 341 Interlock the rotator Remove plastic cover from the LUCIFER vacuum flange Remove plastic cover ferom the auxiliary cryostat flange oR Ne Hook auxiliary cryostat to the crane support structure a On the side with the gate adjust the length of the chain by placing the according corresponding hook in the 9 chain element b On the other side no adjustment is needed 6 Lift the auxiliary cryostat with the telescope crane on the rails in front of the LUCIFER gate Watch out for the cablingcables 7 Put the O ring on the LUCIFER gate a You will find the O ring cleaning tissues and vacuum crease in the toolbox below the auxiliary cryostat b Clean the O ring and the aceerding corresponding nut on the gate c Crease the O ring d Put the O ring in the nut The O ring is slightly smaller than the nut so use a lot of crease to keep it stick in the nut 8 Push the auxiliary cryostat on its rail onto the LUCIFER gate 9 Check the alignment of the auxiliary cryostat 10 Put the clamps also in the toolbox below the auxiliary cryostat to fix the vacuum 11 Connect the power supply and the pressurized
26. the gates g The Gate LUCIFER LED indicators are open If not toggle the switch on the panel for the power and pressurized air supply which simulated the state of the LUCIFER gate h The scroll pump is switched off Scroll Pump switch not active off i All four evacuation and venting modes switched off accerding corresponding LEDs inactive switches off j The manual valves at the venting tube are closed 5 2 Venting the auxiliary cryostats To vent the auxiliary cryostats 1 Fully open the manual valve at the venting tube 2 Switch on Venting Cryostat by pressing the accerding corresponding button on the control panel This starts the automated venting program a The correspondingaccerding indicator light of the button turns on b The green LED Venting Cryostat starts blinking at 5Hz Hz to indicate the waiting period of 4 min to let spin down the turbo molecular pump if the cryostat was in evacuation mode before c After the waiting period the venting valve is automatically opened and the green LED Venting Cryostat starts blinking faster at 10 Hz d After the venting time of another 5 min the green LED Venting Cryostat switches permanently on indicating that the cryostat has finished its venting program e Check if the cryostat is fully vented by i Verifying that the pressure gauge 1 reads more than 5x10 mbar Please note the vacuum gauge cannot correctly measure a p
27. the motion the other person should operate the control panel b Switch the Magazine in off out switch from off to in c Gently push the cabinet at its main structure not at the side wall with the holes see 4 3 towards the auxiliary cryostat until the rotating spindle picks up the cabinet and pulls it into the auxiliary cryostat d Assoonas the cabinet is fully inside the auxiliary cryostat and reaches the limit switch i The spindle motor will stop ii The Magazine in LED indicator will light up e Switch off the Magazine in off out switch 6 Close the thermal bridge by pressing the Themal Bridge open close switch down until the Thermal Bridge closed LED indicator will switch on 7 Remove the big aluminum frame 5 6 Evacuation of the auxiliary cryostats Evacuate both cryostats To evacuate the auxiliary cryostat 1 Check that the gate is free and no items could block its way 2 Attach the plastic cover to the gate 3 Switch off the Cryostat Venting Mode by releasing the according corresponding button The button light and the Cryostat Venting LED indicator must go off 4 Close the gate of the auxiliary cryostat by pressing the Gate Auxiliary Close button You may have to repeat this several times until the gate really close in particular if it has not been operated for some time The Gate Auxiliary closed LED indicators must go on 5 Switch on the scroll pump by pres
28. tral focal station 5 Power up the laptop login and password also printed on top of the screen a Login mos b Password mesQp 6 After the startup you will find a readme file where and which name with more detailed instructions on 1 Formatted Font Italic a Howto remotely login to the LUCIFER instrument workstation b How to start remote access from Garching c How to install and run the LUCIFER Webcam 7 Double click the Run VNC Server Icon on the Desktop to start the VNC server This will allow MPE Garching to have remote access to your Display Mouse Keyboard The running VNC client will show up as a white symbol in the Windows task bar It will turn green if MPE Garching is remotely connected 8 Double click the Skype icon on the Desktop and call remote support from Garching 9 Double click the SUN_LBT icon on the Desktop for remote access to the LUCIFER workstation a Login engineer b Password BF423 c Inthe NX Available Sessions popup window press New to create a new session This will open a full screen X terminal From now on work in this terminal window 10 Double click the Cabinet Exchange Gui icon on the instrument workstation desktop It will open the following panel f Formatted Strikethrough ee Formatted Font color Red Cabinet Exchange Procedure Formatted Centered all software services running attach auxiliary cryo
29. ve is automatically opened and the green LED Venting VI starts blinking faster at 10 Hz d After the venting time of another 1 min the green LED Venting VI switches permanently on indicating that the cryostat has finished its venting program e Check if the vacuum interface is fully vented by verifying that the pressure gauge 2 reads more than 5x10 mbar Please note the vacuum gauge cannot correctly measure a pressure above a few 100 mbar 5 14 Removing the auxiliary cryostat from LUCIFER Removing the auxiliary cryostat from LUCIFER follows the reverse sequence of 5 10 See also this section for pictures illustrating the individual step 1 10 11 12 13 Check if the vacuum interface is fully vented by verifying that a the pressure gauge 2 reads more than 5x10 mbar Please note the vacuum gauge cannot correctly measure a pressure above a few 100 mbar b the Venting VI LED indicator is permanently on Disconnect the pressurized air from the LUCIFER cryostat panel next to the sockets J105 and J106 Disconnect the two cables P15 and P16 from the auxiliary cryostat Tie the cables to the LUCIFER cryostat Instead connect the two cables P115 and P116 from the auxiliary cryostat control electronics Disconnect the cable P19 from the back of the MOS control electronics Disconnect the two cables P102 and P103 from the LUCIFER control electronics and tie the cables to the auxiliary cryostat Disconne
30. x cable to the frame of the auxiliary cryostat Then bring up the cryostat to level 6 Oo e Move cryostat below the hatch up to the telescope Hook auxiliary cryostat crane support structure to the telescope crane Hook auxiliary cryostat to the support structure a On the side with the gate adjust the length of the chain by placing the according corresponding hook in the 9 chain element b On the other side no adjustment is needed Lift up cryostat to level 5 Bring up trolley to level 5 using the elevator Place auxiliary cryostat back on its trolley Bring up the auxiliary cryostat to level 6 using the elevator Bring up auxiliary cryostat crane support to level 6 using a trolley and the elevator 5 9 Preparing the computer setup at the instrument platform The MOS laptop and all necessary accessories are available from the MOS LAPTOP CAMERA plastic box This box also includes the equipment for running the LUCIFER internal webcam but the use of the webcam is not part of the regular cabinet exchange but only necessary for debugging and maintenance MOS LAPTOP CAMERA To setup the MOS laptop on the instrument platform Get the small table from the access area up to the platform Connect MOS Laptop to its power supply using the dedicated power extension changing from US to European socket The battery might be low so always run on external power 3 Connect USB mouse 4 Connect LAN cable to the port below the cen
31. yostats MaskexchangeFilling the cabinet with new masks Loading the cabinet to the auxiliary cryostat Evacuation of the auxiliary cryostats Cooldown of the auxiliary cryostats Transport of the auxiliary cryostats up to the level 6 Preparing the computer setup at the instrument platform Mounting the empty auxiliary cryostats to LUCIFER Evacuation of the interface flange and opening of the gates Computer controlled cabinet transfer from LUCIFER to auxiliary cryostat Close the gate and vVenting the interface flange Removing the auxiliary cryostat from LUCIFER Mounting the auxiliary cryostat with the new magazine Evacuation of the interface flange and opening of the gates Computer controlled cabinet transfer from the auxiliary cryostat to LUCIFER Close the gate and vVentiag the interface flange Removing the auxiliary cryostat from LUCIFER Clearing the instrument platform Transport of auxiliary cryostats down to the laboratory Re evacuatienPumping of the auxiliary cryostats 23 Warming up the auxiliary cryostat 24 Storing the auxiliary cryostats 25 Testing the new masks The individual steps are now explained in detail in the following sections 5 Detailed description of the individual steps 5 1 Preparing the mask and cabinet exchange The mask and cabinet exchange requires that 1 You have received the new masks Currently the new masks will be delivered by express service from MPE Garching G
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