CAL DQM21-28 January 2004

Thomas Schörner-SadeniusDESY, 28 January 2004

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 2

This CAL DQM Week …

… was actually my first week on shift ;-)

… was rather busy and showed several problems:

1. Friday, Saturday: Funny behaviour of module B17: From time to time all channels dead; scope shows shaky signal with reduced amplitude. Suspicion: local clock signal to front-end card corrupt? Problem occurred once more.

2. Saturday/Sunday: Readout had to be restarted several times by the shift-crew because of hand-shake problem with EVB.

3. Sunday: Very high dead-time (80%) and CAL busy. Before, CFLT had closed some hot cells. Mauricio discovered bad PED sigma in B10. Bad channel update cured (?) the problem. Now bad channels gone again.

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 3

Details I

21/01/04: CAL_QUICK_CALIB 47339 calibration 3359 298 bad channels, 2 holes

22/01/04: QIN 16778 0/3(1)/0 UNO 16779 0/0/0 PED 16780 0/0/0 calibration 3360 FEC (fast) calibration 3361

trimming UNO 16794 48/100/23 QIN 16795 5/2/1 PED 16796 14/7/1 calibration 3362

243 bad channels, 0 holes

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 4

Details II

23/01/04: Michele discovered funny B17 behaviour: all channels bad, UNO and QIN show only half the signal. Scope study with Isabell shows flickering

B17 signal. Suddenly flickering disappears (did we

touch cables on third floor?). adc2volt ec_1 run 16805, adc2volt version 2292 UNO 16807 QIN 16806 PED 16808 calibration 3363

256 bad channels24/01/04: CAL_QUICK_CALIB 47396

UNO 2/2/0 QIN 0/0/0 PED 0/0/0 calibration 3364

260 bad channels, 2 holes

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 5

Details III

25/01/04: 6 am: Shift crew: restart the readout (hand-shake with EVB does not work). 7 am: high dead-time (80%) and CAL busy ???? PED sigma energy problem in PHYSICS runs.

CAL_QUICK_CALIB 47427 UNO 1/4/0 QIN 0/9/0 PED 0/9/0 calibration 3365

274 bad channels, 2 holes Note: B10 problem shows up in the bad

channels!

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 6

The B10 problem

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 7

Details IV

26/01/04: CAL_QUICK_CALIB 47459 calibration 3366

285 bad channels, 2 holes

27/01/04: UNO 16821 0/2/0 QIN 16820 0/0/0 PED 16822 0/0/0 calibration 3367

287 bad channels, 2 holes

FEC (ec_1/5 16823/16827) calibration 3368 trimming UNO 16831 QIN 16828

PED 16832 calibration 3369235 bad channels, 2 holes

DESY, 28/01/2004 TSS: CAL DQM 21-28/01/2004 8

Status (calibration 3369) 235 bad channels (103/105/27)

2 holesB14 Tower 7 Typ 1 : UNO mean too lowB22 Tower 4 Typ 2 : UNO RMS too big / UNO mean too low.

2 bad front-end cardsF12 Tower 6 : pipeline gain spreadF8 Tower 14 : pipeline pedestal spreadplus problems in B2, B10, B12, B16

FCAL BCAL RCAL TOTAL

FEC 43 1 4 48

UNO 45 98 22 165

QINJ 6 2 1 9

PED 9 4 0 13

TOTAL 103 105 27 235