|
CMS Pixel Detector
Miscellaneous
|
|
Phase 1
Phase 2
|
|
Layer 1 Replacement
Layers 2-4
|
| Layer 1 Replacement Elog |
Not logged in |
 |
|
|
|
|
|
Message ID: 44
Entry time: Tue Dec 3 12:15:54 2019
In reply to: 43
|
| Author: |
Andrey Starodumov |
| Category: |
Full test |
| Subject: |
4 modules FT |
|
|
| Andrey Starodumov wrote: | FullQualification of four modules M1526, M1529, M1521 and M1534 has been done. Full time of the test is about 5.5hrs.
Test included: FT@-20C, IV@-20, 3Cycles from -20C up to +10C, FT@10C and IV@10C.
Only M1521 passed the test (Grade B). Several issues observed in other modules:
1) 2-6 ROCs with TrimBit test failure for many pixels
2) Trimming id bad for some ROCs
3) test at +10C often better than at -20C
4) some ROCs have issues with Thr and Gain distributions (out of specifications)
To be understood before the mass production! |
We have run with Urs TrimBit test for M1526 at room T (without turning ON coldbox)
and results are confirmed yesterday observations of TrimBit test failure of several ROCs.
Urs will take a look and try to understand the issue.
To illustrate the problem below two summary tables of M1526 at -20C and +10C are shown. |
|
|