FEB ID | Diode & protection Res. rework | Tested
w/ 4hybrids
old plate | Cleaned | Ready to be loaded on production plate | Comment |
|---|
1 | ? | | | | |
| 2 | N | - | - | | - | Back from amtech? |
| ? | | 12/10/14 res1 | ? | ? | Except for the edge channels, the noise on CH 0-2 ranges from ~47-50 ADC counts. The edge channel noise is ranging from ~53 - 55 ADC counts. This is consistent with previous observations so these channels seem fine.
The ripple is still present on FEB CH 03. Overall, the noise accross that whole hybrid is ~10 ADC higher than the rest of the channels. |
| 3 | N | - | - | - | Waiting to be reworked. |
| 4 | N | - | - | | - | Waiting to be reworked. |
| 5 | Y | 12/11/14 res1 | 12/11/14 | YES | It looks fine. |
| 6 | Y | 12/11/14 res1 | ? | | The baseline of FEB CH 00 looked very strange for the last run. Most of the events were at ~6150 ADC counts and the noise was ~900. Let's rerun in order to check if the problem persist. |
| 7 | ? | | | | |
| 808 | Y | 12/11/14 res1 | 12/11/14 | YES | This board looks fine. |
| 9 | ? | | | | |
| 10 | Y | 12/11/14 res1, res2 | 12/11/14 | YES | After power cycling? everything looks fine now. |
| 11 | Y | 12/10/14 res1, res2 | | NO | Again, overall the noise looks fine (~50 ADC counts) but there seems to be some samples that still have a large shift in the noise. Looking at the baseline distribution, there seeems to be some large tails so that's probably the problem (ADC sampling point is off?). I'll need to look at the data a bit closer tonight but for now, we can move on. |
| 12 | Y | 12/11/14 res1 | 12/11/14 | YES | The baseline, once again, has tails but overall the noise looks fine on all FEB channels. The baseline and noise on FEB CH 1 and 3 have features similar to what we saw yesterday -- first sample noise is shifted by ~5-10 ADC counts. All other samples look fine. |
| 13 | ? | | | | |
| 14 | ? | | | | |
| 15 | Y | 12/10/14 res1 | 12/11/14 | YES | Baseline has tails and the shifts in the noise are present on the same APV's as before (on CH 1) but otherwise it looks fine. The shifts in the are likely being caused by the fact that I'm using RMS for noise instead of fitting the distribution. |
/EPP