COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
Outline/List of activities: Outline/List of activities:
9 Solve configuration problems of SPDCB in crate 6 (again TRIGPGA blocked). The only problem of configuration I saw in the week.
9 Record about 120 k cosmics events. One lesson from the previous week is that if we want (and we do !) to get a large number of cosmics, we have to record them
ourselves outside the global activity ourselves, outside the global activity. 15 Hz. Quite pure.
Runs 2764§ (18k) and 26647 (108k).
9 PRS HV at some point of the calibration runs dropped from 750 V to 400 V (3 boards out of 5).
SPD HV were stable (around 600 V).
Overcurrent Channel 7 of PRS: overcurrent is seen also when there is no HV Overcurrent Channel 7 of PRS: overcurrent is seen also when there is no HV.
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 P d t l i lib ti i l It h d th t LEDTSB C id
9 Pedestal runs: are using calibration signals. It happened that LEDTSB C-side was configured (independantly of my wishes) to deliver signal to LEDs. They actually gave light saturating the electronics (HV = 750 V).
9 Three messages:
9 We’d like the LEDTSB configured on demand and not spontaneously.
9 Is LEDTSB A-side cabled ?
9 I t d t f f A i th t th d
9 I computed a mean current of few nA in the worst case so the concern expressed in my related e-mail does not stand anymore.
9 Side observations:Side observations:
9 Very uniform response of the PRS
9 SPD has holes most likely related to the internal time-alignment (Carlos shall send to me in the next days the results of his calculations.)
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Trigger Path:
9 Trigger Path:
9 We recorded runs w/ SPD multiplicity larger than 5 as unique trigger. We saw fantastic tracks in SPD and PRS with a rate of few per ten minutes as well as showers (the main part of the statistics).
9 We did our best to get ready w/ PRS TRIGPGA configuration on A-side before Patrick’s vacations Was achieved on Friday’s morning Too late Yet we are ready Patrick s vacations. Was achieved on Friday s morning. Too late. Yet, we are ready to perform the commissioning of the SPD/PRS trigger path in the beginning of August.
COMMISSIONING MEETING – JULY 2008 – W5
TRIGGER : A-side is fully configured !!
•Updating ECAL input phase values has required to test cable one by one : long process
•Updating ECAL input phase values has required to test cable one by one : long process
24 February 2008 status
BCID values not taken into account
22 July 2008 status
BCID values taken into account Final DAQ configuration
PRS4 Final DAQ configuration
Problem : Problem :
FEB12 @ PRS5 has no allowed phase range for ECAL i t ( t b d
S.Monteil PS/SPD COMMISSIONING 4
PRS4
ECAL inputs (not observed on February 2008)
COMMISSIONING MEETING – JULY 2008 – W5
TRIGGER : A-side is fully configured !!
• Internal PRS alignment is OK : gain of the foreseen 4 clock cycles
• ECAL latencies are set (according to previous measures)
Æ
All settings are determined for A-side and propagated to PVSS
Æ
All settings are determined for A side and propagated to PVSS
configuration
Next : Next :
• Do the same for C-side ⇒ Access to ECAL&PRS C-side required.
• Confirm the previous ECAL-PRS & PRS-TVB latency measures (a difference of one clock cycle is possible due to input phase value)
S.Monteil PS/SPD COMMISSIONING 5
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Trigger Path: BCN analysis
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 PRS Cooling:
Don’t know whether it’s significant or not: temperature increases when moving from the Don t know whether it s significant or not: temperature increases when moving from the beginning to the end of the cooling system. First box is < 23 °C.Last is <28°C. Last
report was temperature less than 25 °C everywhere.
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Pedestal corrections:
1) Stable all along the week.
2) Some cables replugged on PRS_3. Corrections measured. OK. 3) 2 new channels w/ a pedestal larger than 255 (A-side).
4) PSFEB07 i PRS 0 h i d d t l i ti 4) PSFEB07 in PRS_0 shows a weird pedestal variation. 5) Currently corrected <PRS_ADC>=0.
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Pedestal corrections:
1) 2 new channels w/ a pedestal larger than 255 (A-side).
In total [Feb,Ch]: [23,28], [53,24], [76,11],[82,45],[92,10]
S.Monteil PS/SPD COMMISSIONING 9
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COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Pedestal corrections:
4) PSFEB07 (1/2) in PRS_0 shows a weird pedestal variation. Pedestal corrections such that <PRS> is around 15.
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Pedestal corrections:
4) PSFEB07 (1/2) in PRS_0 shows a weird pedestal variation.
weird
OK
weird
COMMISSIONING MEETING – JULY 2008 - W5
PS/SPD STATUS
9 Plans for the week:
9 Smooth restart of the system.
9 Understand/fix the current problems.
9 Include SPD time alignment corrections.
9 Refine trigger path for next week commissioning : GET OUT PRS AND ECAL EACH TIME IT IS POSSIBLE.
9 Record large cosmics statistics
9 Record large cosmics statistics.
9 Few improvements of PRS PVSS project.
