1. S.MonteilPS/SPD COMMISSIONING1 OUTLINE 1)PROGRESS REPORT. 2)PLANS. 3)CONCLUSION. COMMISSIONING MEETING – JUNE 2008

2. S.MonteilPS/SPD COMMISSIONING2 PS/SPD SCHEME  LEDs or XCAL cosmics  Tubes response  VFE integrates signal  Transmission to FE Board  Digitalize and correct PS data DAQ PATH @ L0 PSTELL1 EventBuilder Recompute the trigger response TRIGGER PATH @ 40 MHz Trigger cabling Build Trigger Information Go to SPD CB Go to Validation Board COMMISSIONING MEETING – JUNE 2008

3. S.MonteilPS/SPD COMMISSIONING3 PRSDAQ_X1 PSFEB project improved with glue resets included. CROC project improved with specs master resets included. SPD CB project improved with checks of registers. Configuration time is an issue on C-side (more than one minute). 1) PVSS

4. S.MonteilPS/SPD COMMISSIONING4 General comment: Since the global commissioning week, we only took few sucessful pedestal runs (yesterday). 1) PVSS

5. S.MonteilPS/SPD COMMISSIONING5 2) PRS / VFE The pedestal corrections

6. S.MonteilPS/SPD COMMISSIONING6 2) PRS VFE VFE CLK KO ( 2 ½ boards) VFE SYNC ISSUE (3 boards) DEAD CHANNELS SAMPLING ISSUES ?? TO BE SCRUTINIZED … 255+ PEDESTALS (2 CHANNELS) PRS Noise in Prev2 COSMIC RUN 23989 (4 June 2008) PRS in T0 HV ON ! N.B: Both VFE ½ channels are in Prev2 The remaining DAQ/synchronisations issues in one shot:

7. S.MonteilPS/SPD COMMISSIONING7 2) PRS VFE The noise performance: C SIDE A SIDE

8. S.MonteilPS/SPD COMMISSIONING8 2) PRS VFE - Status VFE CLK KO ( 1+½ boards) VFE SYNC ISSUE (SOLVED A SIDE) DEAD CHANNELS (2+) CONFIRMED CAT C SIDE A SIDE 255+ PEDESTALS (1+ CHANNELS) PRS Noise in T0 PEDESTAL RUN 25178 (24 June 2008) HV OFF N.B: 1 VFE ½ channel only in T0 C SIDE VFE DEAD

9. S.MonteilPS/SPD COMMISSIONING9 2) PRS-SPD VFE - C-side power supply 1)VFE C RECTIFIER ILL FUNCTIONING (BLINKING LED)  NO VFE POWER ON C SIDE ( brand new 24 June / some preliminaries …) 2)PUT SPARE C RECTIFIER IN VFE C SLOT  MARATHON VFE C FUSED … more likely ( LED flash & then dead … ) 3)VFE C RECTIFIER STILL ILL FUNCTIONING IN VFE A SLOT (BLINKING LED)  RECTIFIER ISSUE / HAS BEEN TAKEN OUT 4)SPARE C RECTIFIER IN VFE A SLOT ?  NOT TESTED … suspicious rectifier has been taken out too SUMMARY: 1 DEAD RECTIFIER 1 SUSPICIOUS RECTIFIER (FUSED A MARATHON?) MARATHON VFE C FUSED Good News: SPARE-A DOES WORK! PLANS: (WHO?) 1) DIAGNOSE/REPAIR MARATHON VFE C 2) PUT SPARE A RECTIFIER IN SLOT VFE C 3) DIAGNOSE/REPAIR THE RECTIFIERS

10. S.MonteilPS/SPD COMMISSIONING10 Used to take more than one slide. Huge progresses since last meeting. All faulty boards or components have been changed or repaired and perform now well. The overfull fifo / underfull bug are fixed. We know that the event size is an issue at high frequency from data generator studies. Test with nominal events still to be performed. 3) TELL1

11. S.MonteilPS/SPD COMMISSIONING11 We recorded several tenth of cosmics data with PRS and SPD, either muon or XCAL triggered. Both detectors were aligned in the correct bunch crossing. All expected time differences are accounted for by dedicated settings of the adequate phasers. PRS pedestals were nicely subtracted for the main part of teh channels. SPD thresholds yield very few noise. The correct mapping of the channels has been successfully corrected in the software. The first analysis : (see Ricci’s talk) yields encouraging results in term of time pre-alignment, time-alignment method as well as cosmics efficiency. 4) COSMICS DATA

12. S.MonteilPS/SPD COMMISSIONING12 4) COSMICS DATA. The Prs weird events at the 1/1000 frequency They occur always at the same BCID (147 and 167 in the runs we take). It is likely that the trigger comes close a VFE reset, which makes the chips stuck for some bunch crossings. There, we are applying the VFE+ADC pedestal correction to ADC pedestal only. In physics, VFE reset occurs in a large machine sequence of empty bunches.

13. S.MonteilPS/SPD COMMISSIONING13 4) COSMICS DATA. The HV issue We missed one half of C-side. HV resistor blown on both SPD and PRS lines. We have to be precise about the order of operation.

14. S.MonteilPS/SPD COMMISSIONING14 5) TRIGGER PATH Since PRS and SPD are time-aligned in the DAQ path, a large part of the two last weeks was dedicated to include them in L0Calo. We measured (at least we had strong indications) that the PRS/SPD time budget was larger by several clock cycles than the expectation (See Eric’s talk). Two issues: TVB pipelines are too short by more than 10 clock cycles and a new firmware is needed. The overall time budget of L0Calo is already close to the limit. That won’t help.

15. S.MonteilPS/SPD COMMISSIONING15 5) PLANS as a conclusion We’d like to record this week a large number (> 100 k) of cosmics, to exercise the time-alignment methods. At least A-side is fine. Fix the C-side rectifier and Marathon. Complete the work on the measure of trigger time budget. Still need to robustify our numbers.