 Tue Aug 6 16:01:17 2019, Matej Roguljic, Software, Wrong dac settings - elComandante
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If it seems that elComandante is taking wrong dac settings for tests like Reception test or full qualification, one should remember that it does NOT read
values from module specific folders like "M1523", but rather from tbm-specific folders like "tbm10d". The folders from which the dacs are taken are listed
in "elComandante.config", the lines which look like "tbm10d:tbm10d". |
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Tue Aug 6 16:06:45 2019, Matej Roguljic, Other, Vsh and ctrlreg for v4 chips
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The recommended default value for Vsh is 8, but the current version of pXar has it as 30. One should remember this when making new configuration folders
from mkConfig. The recommended value of ctrlreg is 17. |
Wed Aug 7 11:49:07 2019, Matej Roguljic, Module assembly, HDI glue irradiation tests 10x
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Six different glues were used to glue the cap on six dummy modules. They were all irradiated to 120 MRad in Zagreb after which they were taken to PSI and
tested with the tweezers under the microscope.
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Wed Aug 7 12:24:14 2019, Matej Roguljic, Documentation, Activities 31.7.-9.8.2019.
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31.7.
Matej tested 4 HDIs (8030-8033 and 8010). 8010 had a faulty TBM which was replaced, however, during subsequent tests, other TBM (the one which was working |
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Wed Aug 7 18:01:06 2019, Matej Roguljic, Cold box tests, PhOptimization problem
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August 7 - we found out that PhOptimization algorithm starts leaking memory if it fails to find proper values. If running one setup, the test might go through.
However, if multiple modules are tested in parallel and they all start leaking memory at the same time, the system will kill one testboard process (or
two if necessary), causing the unlucky testboard(s) to get stuck (powered on, HV on, but no tests running) until they are reset. Current solution to this |
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Tue Sep 10 15:18:20 2019, Matej Roguljic, Other, Modules 1504, 1505, 1520 irradiation report
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Modules 1504, 1505 and 1520 were taken to Zagreb for irradiation on 13.08.19. The goal was to check the v4 behavior after irradiation. They were irradiated
to 1.2 MGy and returned to PSI on 9th of September. Upon testing them at PSI, they all had issues. ROCs on M1504 and M1520 were not programmable at all,
changing Vana had no effect. Vana could be set on M1505 while targeting Iana = 28 mA/ROC, however, no timing could be found for it and no working pixel |
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Thu Sep 12 10:32:27 2019, Matej Roguljic, General, Activities 10.9.-19.9.2019.
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10.9.
Modules 1504,1505,1520 brought to PSI after irradiation to 1.2 MGy in Zagreb. All 3 were not working when put under test with pXar. 1504 and 1520 couldn't
set Vana at all. 1505 could set Vana, but timing couldn't be found and pixels weren't responding. Inspection under the microscope showed some "white-greenish" |
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Wed Sep 18 15:45:45 2019, Matej Roguljic, Module assembly, HDI sparking under HV test 7x
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HDI [B]8010[/B] passed all test except the HV. Under the HV test, some sparks could be heard and even seen by eye on the right TBM (closer to the HV pad!).
Testing it again, showed that it was indeed damaged by the spark. Sparking craters could be seen with the microscope between pads 4 and 5 of the TBM.
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 Thu Sep 19 14:20:07 2019, Matej Roguljic, General, Activities 10.9.-19.9.2019.
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[quote="Matej Roguljic"]10.9.
Modules 1504,1505,1520 brought to PSI after irradiation to 1.2 MGy in Zagreb. All 3 were not working when put under test with pXar. 1504 and 1520 couldn't
set Vana at all. 1505 could set Vana, but timing couldn't be found and pixels weren't responding. Inspection under the microscope showed some "white-greenish" |
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Thu Sep 26 17:38:07 2019, Matej Roguljic, General, Activities 25.-26.9.
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It was planned to test a batch of HDIs these 2 days but the shipment was late. Dinko and Andrei were shown the HDI testing procedure. Matej further worked
on the script used to test the HDIs. Dinko glued caps on 2 dummy modules and on M1522. New HDIs arrived on 26th and it looks like the kapton will have
to be put underneath them during the testing to prevent sparking. |
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Mon Oct 28 17:01:05 2019, Matej Roguljic, Software, Investigating the bug with the Keithley client
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We took module 1529 and tried recreating the issue observed in the beginning of October. To do this in a reasonable amount of time, a "shorttest" procedure
was defined which consists only of pretest and pixelalive. Three runs were taken
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Tue Oct 29 16:36:23 2019, Matej Roguljic, Module assembly, Assembly lab cap gluing jigs
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There are two jigs for cap gluing in the assembly lab, circled in red and blue on the photo in the attachment. The one closer to the door (red) we used
to build glue Phase 2 HDI to a dummy sensor and four Phase2 ROCs. Before changing the head, the numbers of the alignment screws were noted.
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Tue Oct 29 16:38:32 2019, Matej Roguljic, Software, Investigating the bug with the Keithley client
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[quote="Matej Roguljic"]We took module 1529 and tried recreating the issue observed in the beginning of October. To do this in a reasonable amount of time,
a "shorttest" procedure was defined which consists only of pretest and pixelalive. Three runs were taken
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Wed Oct 30 10:38:04 2019, Matej Roguljic, General, Activities 28.-31.10.2019.
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28.10. - Investigated a problem with the FullQualification setup, described more in this [URL=https://elrond.irb.hr/elog/Layer+1+Replacement/23]note[/URL]
29.10. - Further investigated the aforementioned problem and worked on preparing the jigs for Phase2 dummy module building.
30.10. - Confirmed that the reported issue is not present at the moment on the qualification system. Glued dummy sensor to four phase2 ROCs. Built a FC7 |
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Wed Oct 30 16:54:58 2019, Matej Roguljic, Software, Investigating the bug with the Keithley client
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[quote="Matej Roguljic"][quote="Matej Roguljic"]We took module 1529 and tried recreating the issue observed in the beginning of October. To do this in a
reasonable amount of time, a "shorttest" procedure was defined which consists only of pretest and pixelalive. Three runs were taken
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Thu Oct 31 10:41:12 2019, Matej Roguljic, Cold box tests, Issue with DTB_WWVASW
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On 29th of October, an issue with DTB_WWVASW was noticed when trying to run FullQualification on 4 modules at the same time. On a tested, working module,
setting Vana works but taking tornado plots (setvthrcomp) doesn't as well as other tests. Curiously enough, after switching the DTB with the one used for
HDI testing (DTB_WRN13L) the problem was still there. This lead us to believe that the problem was with cables or ground. All cables and the adapter were |
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Wed Nov 27 08:39:24 2019, Matej Roguljic, Cold box tests, Bump bonding test investigation
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The BB test on M1534 shows a lot of dead bunmps on C10 and some on C1 and C0 as well. Putting a source on top of the module shows that the pixels for which
the test showed dead bumps are still able to read hits from the source. Therefore, it looks like the bumps are working, but the test is reporting them
as defective. It turns out that the bumps used by Helsinki are different than the bumps used at PSI so a different test needs to be used. After trying |
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Thu Nov 28 15:58:20 2019, Matej Roguljic, General, Activities 26.-29.11.2019.
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26.11.
Prepared the tools for RD53A digital module assembly in the assembly lab
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Mon Jan 20 18:09:50 2020, Matej Roguljic, General, Activities 20.-31.01.2020.
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20.01.
Expanded the HDI testing setup to be able to mount wire-bonded HDIs to HDI handles. Tested 12 HDIs (v7.2), all of them passed the tests. HDIs were given |
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Mon Jan 27 17:50:48 2020, Matej Roguljic, Cold box tests, Failing modules at -20
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Friday, 24.1., it was noticed that the modules are graded as 'C' in similar fashion. Module is graded A/B at +10 degrees and then graded C at -20. The reason
for grade C was that the trimming procedure was not successful on at least one of the ROCs on each module. This problem was further investigated on 27.1.
Wolfram suspected that the problem lies in zero suppression mode since the pixels with failed threshold comes in groups of four pixels. The corresponding |