CMS Pixel Detector Miscellaneous
Phase 1 Phase 2
Layer 1 Replacement Layers 2-4
  Layer 1 Replacement Elog, Page 8 of 13  Not logged in ELOG logo
Entry  Wed Mar 25 20:17:16 2020, danek kotlinski, Module doctor, The list of modules tested today by Wolfram 
M1542 nothing on sdata3 (12-15), bad output or wire-bond
M1544 ROC15 timing off, can be made to work (roc 15 vdig 11, ..), but probably not usable for the detector
M1545 full readout, ok, upgraded to C*
M1546 TBM1 output alpha broken (sdata1) => replace TBM1
M1563 ROC 8 thinks he is roc 10 ==> check address wire bond on roc 8?
M1567 roc 11 missing, sdata2 (b-channel)
M1572 sticker says : both TBMs broken, no SDA => replace both TBMs?
M1593 tbm0, core B (roc 0-3), no decodable output, core/stack working ok, output beta+ high ~ 2V
M1594 roc 0 dead
M1615 nothing on sdata 3 (12-15), very bad cable (corrosion?) re-running with new cable
M1616 ROC 10 not programmable, no roc headers on sdata2 (b) ==> TODO check clock to roc 10
M1617 readout but no hits in ROC 8, mechanical damage on chip edge
M1621 ROC 8 not programmable, no roc headers or tbm trailers on sdata2a (tbm1b) ==> TODO check clock on ROC 8
M1623 probably no cal-trig-reset to roc 0-3
M1625 definitely not cal-trig-reset to roc 0-3 (CTR- at 0V), damaged when trying to pull wire-bonds
M1575 no readout from rocs 0,1 (tbm0b, sdata4), all rocs programmable ==> TODO check CTR roc 0
Entry  Wed Mar 25 18:40:53 2020, Andrey Starodumov, Full test, FT of M1599, M1613, M1624, M1616 
M1599: B due to leakage current at +10 (2-3umA)
M1613: B due to a few pixels with bad trimmed threshold
M1624: B due to a few ROCs with mean noise>200electrons
M1626: A
Entry  Tue Mar 24 18:11:52 2020, Andrey Starodumov, Re-grading, Reanalised test results 
Test resulsts of several modules have been re-analised without grading on trimbit failure.
M1614: C->B
M1613: C->A
M1609: C->B
M1618: B->A
M1612: B->B
M1610: B->B
M1608: C->B
M1606: C->C (too many badly trimmed pixels)
M1605: C->B

Most of all B gradings and one C are due to badly trimmed pixels. The threshold after trimming usually has 3(!) separated peaks.
We should understand this feature.
    Reply  Wed Mar 25 18:31:46 2020, Andrey Starodumov, Re-grading, Reanalised test results 

Andrey Starodumov wrote:
Test resulsts of several modules have been re-analised without grading on trimbit failure.
M1614: C->B
M1613: C->A
M1609: C->B
M1618: B->A
M1612: B->B
M1610: B->B
M1608: C->B
M1606: C->C (too many badly trimmed pixels)
M1605: C->B

Most of all B grading and one C are due to badly trimmed pixels. The threshold after trimming usually has 3(!) separated peaks.
We should understand this feature.


More modules have been re-analysed:
1604: C->B
1603: C->B
1602: C->B
1601: B->A
1545: C->C (too many pixels on ROC14 are badly trimmed, to be retested tomorrow)
Entry  Wed Mar 25 18:30:23 2020, Andrey Starodumov, HDI test, 4+2 HDI tested 
2 suspicious HDIs retested and found OK: 5006/5007
5013, 5016, 3017, 3019 are OK.
Entry  Tue Mar 24 18:09:07 2020, Andrey Starodumov, Full test, FT of M1615, M1619, M1620, M1622 
Test results have been analysed with modified code:
M1615: B
M1619: A
M1620: B
M1622: B

One pixel of M1615 still failed mask test but it was not taken in to account in the final grading???
I put it in the shelves for Module doctor. To be decided what to do with this module.
    Reply  Wed Mar 25 17:03:11 2020, Andrey Starodumov, Full test, FT of M1615, M1619, M1620, M1622 

Andrey Starodumov wrote:
Test results have been analysed with modified code:
M1615: B
M1619: A
M1620: B
M1622: B

One pixel of M1615 still failed mask test but it was not taken in to account in the final grading???
I put it in the shelves for Module doctor. To be decided what to do with this module.


For Wolfram one channel of M1615 does not work. He noticed that the cable has corrosion (probably this cable has been attached to a module that has been irradiated in Zagreb). After Reception test this module again graded C due to a mask test failure of one pixel in one ROC.

Wolfram proposed to grade this module as C*.

Entry  Wed Mar 25 14:44:37 2020, Andrey Starodumov, Reception test, RT of M1627 and M1628 
Both modules graded A.
Entry  Wed Mar 25 14:42:55 2020, danek kotlinski, Module transfer, modules 1545 & 1542 back from ETH 
M1545 & M1542 were returned from ETH to PSI for further testing.
Entry  Wed Mar 25 14:17:51 2020, Andrey Starodumov, Full test, FT of M1609, M1613, M1614, M1618 on Mar 23 
FT for these modules has been done on Mar 23
M1609: C
M1613: C
M1614: C
M1618: B

All C due to trim bit test failures
Entry  Wed Mar 25 14:11:35 2020, Andrey Starodumov, Reception test, RT of M1613 and M1614 on Mar 20 
Reception test for these modules have been done on Mar20.
Grading A for both modules.
Entry  Tue Mar 24 16:08:58 2020, Andrey Starodumov, Reception test, M1625 failed Reception 
M1625: all ROCs are programmable but no readout from ROC0-ROC3.
The same symptom as for M1623.
Visual inspection is OK.
To module doctor.
Entry  Tue Mar 24 15:41:29 2020, Andrey Starodumov, Module grading, Change in MoreWeb GradingParameters.cfg  
On March 3d the Vcal calibration parameter has been changed:
- StandardVcal2ElectronConversionFactor from 50 to 44 (electrons/VCal)

Om March 24 the following changes done:
- trimThr from 35 to 50 (to synchronize with current target trimming threshold of Vcal=50)
- TrimBitDifference from 2. to -2. This means that difference between trimmed and untrimmed
threshold close to 0 (<2 as it was) will be ignored.
Entry  Tue Mar 24 15:20:18 2020, Andrey Starodumov, Reception test, M1623 failed Reception 
M1623: all ROCs are programmable but no readout from ROC0-ROC3.
Visual inspection is OK.
To module doctor.
Entry  Tue Mar 24 15:18:59 2020, Andrey Starodumov, Reception test, M1621 failed Reception 
On M1621 ROC8 is not programmable.
Entry  Tue Mar 24 15:16:56 2020, Andrey Starodumov, HDI test, 8 HDIs tested on Mar 23 
1014, 1016, 2001, 2003,
2004, 4013, 4015, 5014
All are good.
Entry  Fri Mar 20 14:46:31 2020, Andrey Starodumov, Reception test, M1615 failed 
M1615 is programmable but "no working phases found"
Visual inspection of wire bonds - OK.
To module doctor!
    Reply  Sun Mar 22 14:05:20 2020, Danek Kotlinski, Reception test, M1615 failed 

Andrey Starodumov wrote:
M1615 is programmable but "no working phases found"
Visual inspection of wire bonds - OK.
To module doctor!


For me this module is working fine.
I could run phasefinding and obtained a perfect PixelAlive.
I left this module connected in the blue-box in order to run more advanced tests from home.
Entry  Fri Mar 20 14:53:52 2020, Andrey Starodumov, Reception test, M1616 failed 
ROC10 of M1616 is not programmable, no readout from ROC10 and ROC11.
Visual inspection of wire bonds - OK
To module doctor!
    Reply  Sun Mar 22 14:02:20 2020, Danek Kotlinski, Reception test, M1616 failed 

Andrey Starodumov wrote:
ROC10 of M1616 is not programmable, no readout from ROC10 and ROC11.
Visual inspection of wire bonds - OK
To module doctor!


For me ROC10 is programmable.
It looks like there is not token pass through ROC11.
This affects the readout of ROCs 11 & 10.
Findphases fails because of the missing ROC10&11 readout.
Entry  Fri Mar 20 17:05:58 2020, Andrey Starodumov, Reception test, M1617 failed 
ROC8 of M1617 is programmable but no readout from it.
Silvan noticed that a corner of one ROC of this module is broken,
this is exactly ROC8.
    Reply  Sun Mar 22 13:57:25 2020, Danek Kotlinski, Reception test, M1617 failed 

Andrey Starodumov wrote:
ROC8 of M1617 is programmable but no readout from it.
Silvan noticed that a corner of one ROC of this module is broken,
this is exactly ROC8.


Interesting that the phase finding works fine, the width of the valid region is 4, so quite
good. ROC8 idneed does not give any hits but the token passed through it, so the overall
readout works fine. There re no readout errors.
The crack on the corner of this ROC is clearly visible.
I wonder how this module passed the tests in Helsinki?
Entry  Fri Mar 20 18:32:34 2020, Andrey Starodumov, Full test, FT of M1609-M1612 
M1609 and M1611 are graded C
M1610 and M1612 are graded B

C and most B grades are due to many trimbit failures. Interesting that this time at +10C there are more failures then at -20C.
Entry  Fri Mar 20 18:09:47 2020, Andrey Starodumov, HDI test, 3 HDIs tested 
5008 failed, but most likely die to the pin head mis-alignment. Test to be repeated.
5007 and 5008: passed tests but during HV measurements (-800V) with a multymeter I heard high frequency noise and instead of -800V measure either -100V or -500V but the voltage jumped significantly. This effect is to be understood.
For the moment these HDIs will not be used in production.
Entry  Thu Mar 19 18:01:50 2020, Andrey Starodumov, Full test, FT of M1605-M1608 
Only M1607 graded B. All others are graded C due to trimbit test.
M1606 should be looked carefully and may be retested since the threshold after trimming has strange features
(although not for all temperatures) that may mean that some trimbits really do not work.
Other modules to be re-analised without results of trimbit test or upgrade manually, since these results
are due to test algorithm. After trimming the threshold looks good for all failed ROCs.
ELOG V3.1.3-7933898