Fixed, TEST, Tue Mar 10 11:05:40 2020, Franco, GRIT, Hardware, 3-alpha, Trip in the cooling system after e775s experiment 
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In the weekend after the experiment e775s (7-8 March 2020) a problem with the cooling system of Mugast occurred. In particular, in the morning of Saturday
7th around 12h the cooling system tripped and some detectors remained switched on until Monday 9th in the morning. After a check, it looks like all Mugast
detectors are ok except MG6, which cannot be biased anymore.
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Fixed, e793s, Tue Mar 10 18:46:13 2020, Franco & Marlène, GRIT, Hardware, , Changes in MUGAST
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- MG6 (FZ) is disconnected.
- MG7 (500um) is dismounted and MG8 (375um) is replacing it.
- The Y kapton of the annular has been changed.
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Fixed, TEST, Wed Mar 11 18:12:40 2020, Marlène & Franco, GRIT, Hardware, N/A, Update on Mugast
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(Probably) final update of the status of the detector before the experiment:
- MG5 does not trigger on Y (no pulser, no alpha source). This can explain why in the last experiment we could not run the time calibration of its Y.
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Fixed, e793s, Wed Mar 11 19:02:54 2020, mugast, GRIT, General, 3-alpha, Alpha calibration for e793s - run 600
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Fixed, e793s, Wed Mar 11 22:01:18 2020, mugast, GRIT, General, 3-alpha, Alpha calibration - run 600
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After 2h30' of run we checked the temperatures of the boards and we noticed that MG7 had 63 degrees on both X and Y, which is very high; MG9 was around
56 on X and 26 on Y. There might be a problem in the loop of the cooling system because the other detectors are pretty fine, with temperatures around 20-25
degrees.
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Fixed, TEST, Thu Mar 12 10:14:02 2020, Marlène & Franco, GRIT, Hardware, N/A, Debugging the cooling system
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We realized that the increase of temperature of MG7 and MG9 during run 600 (alpha calibration) was due to the fact that a loop of the cooling system was
not working since the pipes were not properly connected. We re-connected them and switched on the low voltage without making the vacuum just to monitor
the evolution of the temperature.
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Fixed, TEST, Thu Mar 12 14:47:59 2020, Marlène & Franco, GRIT, Hardware, N/A, Moving MG9 square to MUVI2
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- Since we are not using MG6 anymore (card burnt), we replaced it with MG9 on slot 3 of MUVI2. MUVI4 is now unused. We changed the actions parameters accordingly.
- We cannot run the time calibration for MG9 because the pulser does not go through neither on X nor on Y. |
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Fixed, e793s, Thu Mar 12 14:54:13 2020, Marlène & Franco, GRIT, General, 3-alpha, Run 0601 - alpha source calibration
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We start the alpha source calibration run with pedestal suppression (except for MG7 and MG9) and cooling at 0 deg.
The HV for MUST2 are in attachment. It is not clear whether they will remain unchanged during the experiment since some currents are high. |
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Fixed, e793s, Thu Mar 12 15:48:58 2020, Franco&Marlène, GRIT, General, , Summary and TO DO list 12/03/2020
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What remains to be done
- Do the time calibration of all boards (time calibrator has to be connected)
. When checking the pulser on all boards we saw that MG5 has no triggers on Y and MG9 does not see the pulser (neither X or Y). So we will not |
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Fixed, e793s, Thu Mar 12 17:25:19 2020, mugast, GRIT, General, 3-alpha, run 0601 - alpha source with pedestals
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| Alpha source calibration run without pedestal suppression and cooling at 0 deg. |
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, , Tue May 19 12:23:57 2020, mugast, ONLINE, , ,
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Fixed, e793s, Fri Jan 29 15:11:54 2021, Adrien, VACUUM, General, N/A, MUGAST undervacuum and powered up
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MUGAST is undervacuum thanks to Arnaud and Laurent.
I switch on all BT and HT. everything fine so far. Keeping the HV to check there is no trip on the silicon |
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Fixed, TEST, Tue Feb 2 16:41:17 2021, Franco, VACUUM, Hardware, N/A, MUGAST undervacuum and powered up
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I put back the supply of MM1 to the channel 1 of the MUST2 box (as in the normal configuration) and polarized the detectors to make a rapid re-check. I
didn't see any detector tripping. MM1, switched on only for a couple of minutes, had a stable current at 1.3 uA. The stability of the detectors over time
should anyway be checked better tomorrow leaving them polarized for a longer time.
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Fixed, TEST, Wed Feb 3 16:42:41 2021, Franco, GRIT, General, 3-alpha, Status of the set-up (February 3rd 2021)
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We re-mounted the annular, put the source and cooled down to 0 deg. Voltages and spectra are attached.
MG11 has a very high current (15 uA) but stable. MG9 started from 2 uA and its current is slightly increasing. The MUST2 detectors don't show anymore that
oscillation in current that we observed one year ago. MM3 has a higher current (2.9 uA) with respect to the others.
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Fixed, TEST, Thu Feb 4 18:16:47 2021, Franco, GRIT, Hardware, 3-alpha, Problems with the annular persist 8x
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We opened the chamber to verify the connections of the kaptons but they were all well connected. We checked with the tester the conductivity of the kapton
YA5 and it was fine so we excluded any problem related to the kapton. The boards are working properly (the pulser is well seen). We have to conclude that
the problem comes from the detector. We made another alpha source run and indeed the result is the same as yesterday -> 5 sectors working on Y. We also |
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Fixed, TEST, Fri Feb 5 12:44:42 2021, Franco, GRIT, Hardware, N/A, Pulser on MG11 MUFEE Y
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I managed to obtain the spectrum with the pulser on the annular (Y side, namely sectors).
The raw strip numbers where I should have the 16 sectors are: 14, 16, 18, 20, 22, 24, 26, 28, 36, 38, 40, 42, 44, 46, 48 and 50.
The 5 strips I could see with the alpha source are: 20, 40, 44, 48, 50.
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Fixed, e793s, Mon Feb 8 10:27:23 2021, OttoTime, RUN, General, N/A, TimeCalibratorRun
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*** Run Time Calibrator FSC ***
- Run: 605
- MUVI: MUVI1
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Fixed, e793s, Mon Feb 8 10:39:35 2021, OttoTime, RUN, General, N/A, TimeCalibratorRun
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*** Run Time Calibrator FSC ***
- Run: 606
- MUVI: MUVI1
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Fixed, e793s, Mon Feb 8 10:51:48 2021, OttoTime, RUN, General, N/A, TimeCalibratorRun
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*** Run Time Calibrator FSC ***
- Run: 607
- MUVI: MUVI2
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Fixed, e793s, Mon Feb 8 11:04:04 2021, OttoTime, RUN, General, N/A, TimeCalibratorRun
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*** Run Time Calibrator FSC ***
- Run: 608
- MUVI: MUVI2
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Fixed, e793s, Mon Feb 8 11:16:18 2021, OttoTime, RUN, General, N/A, TimeCalibratorRun
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*** Run Time Calibrator FSC ***
- Run: 609
- MUVI: MUVI3
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Fixed, e793s, Mon Feb 8 11:25:29 2021, Adrien and Freddy, S1, General, N/A, FSC run
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we ran FSC on all card. S1 is dismounted.
Pulser goes on all channel and works well so electronic is fine.
We will ask Laurent to remount the detector and re run the test. |
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