1. CAL and SUBCOMPONENTS STATUS OVERVIEW T. Schörner-Sadenius Hamburg University, on behalf of the CAL group ZEUS Meeting DESY 28 February – 4 March 2005

2. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents2 Outline  People and manpower situation  CAL status: current status and recent problems  CAL DQM development since Padova meeting  Current status of CAL, CFLT(P) and subcomponents (SRTD, SRTDFLT, PRES, F/R PRES, FNC, LED, LASER)

3. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents3 Calorimeter Manpower I General, Coordination Merging of CAL and HES groups slowly progressing  CAL DQM shifters now also do HES DQM checks  Progress also on organisational matters, but not on expert side. Current CAL coordination  TSS: general, DQM, students  Wladimir Hain (DESY): general, infrastructure  Kerstin Borras (DESY): so far HES general and DQM Mara Soares joined the CAL team and will take over CAL DQM coordination from TSS  TSS  run coordinator from April on.  Mara already now is responsible for a number of DQM tasks.  Thanks for joining and good luck! New permanent DESY physicist to join CAL team within few months. Request for one HES post-doc or dedicated student to backup Kerstin!

4. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents4 Calorimeter Manpower II DQM CoordinatorThomas Schörner HH InfrastructureWladimir Hain DESY NEVIS and FE Electronics: Bill Schmidke Columbia Hardware Joker: Cathy Farrow Argonne/DESY LASER: Roberval Walsh McGill SRTD: Roberval WalshMcGill LED: Didar Dobur Freiburg B-PRES: S. Chekanov + H. Lim Argonne/DESY SRTDFLT: John Loizides (CFLT) Argonne F/RPRES, FNC, BCAL basesno dedicated manpower! Michele SumstineWisconsin (-03/2005) Andree Robichaud-V. McGill (-04/2005) Ying Cui Toronto Marcos Jimenez Madrid Avraam KeramidasNIKHEF Gabriel GrigorescuNIKHEF Cathy FarrowArgonne/DESY Changh Yi ZhouMcGill DQM Experts Thanks to Michele and Andree and welcome to Changh Yi! We would appreciate one or two new CAL students General REsponsibilities

5. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents5 Current CAL Status as of yesterday noon: v3959 It is reassuring to know that we are stable around 270 bad channels, if freshly calibrated … FCALBCALRCALTotal FEC401950 UNO3713314184 QINJ413522 PED65011 Total8715228267 Two holes: B22, tower 4: UNO problems B12, tower 8: UNO and QINJ

6. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents6 CAL Problems … … during the past few months – sometimes overlaid  Readout failure in december  only cured with help from Antonio P. and Henk B. from Amsterdam after three days of investigation.  Disk failure on backup readout computer AJAX and major problems with DQM PCs (not used for online)  Timing problems at the CAL-CFLT(P) boundary.  BCAL module 16: often many (>30) bad channels, cabling?  HV of BCAL module 22 fixed (Wladimir changed HV crate), then module 21 was giving some problems.  Os9 hc3control after A. Kotanski’s intervention more or less stable. Luckily there is always somebody who knows more than I do! Thanks especially to Alessandro and the Nikhef colleagues!

7. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents7 CAL Status ctd. … … Computing, spares … Spare situation:  Front-end cards: C. Farrow efficient in repairing old ones – adequate suppluy of spares  NEVIS electronics: spares for all modules; format control card exchanged recently (debugging readout problem).  Digital cards: a few spares available; have to investigate 40-50 old, taken-out cards and repair if necessary. Also many ADCs around.  FCAL EMC PMTs (bases): 19 spares, could become one critical item.  BCAL bases: status unclear – my fault!  9 newly repaired digital crate power supplies just came back! Computing situation  Teucer and Ajax (Solaris stations) running stably; however, old operating system not supported anymore (v2.4?), and recently disk failure on Ajax. But spares around.  2+1 offline/DQM PCs which also gave problems recently but are stable now.  Slightly improving backup situation.

8. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents8 Bad Channel History since Padova week Number of bad channels is more or less stable with 270 or so (after calibration). 1-2 stable holes in BCAL 22 and 22. Some fluctuations in between due to localized problems, mostly solved during access days. Many problems come and go every now and then; especially in BCAL uncer- tainty of ~100 channels (B16, B29 etc.) FEC BC updates Increase since shutdown Now stable Localized problem solved during access day.

9. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents9 F13 t12 EMC1-F13 t12 EMC1+ F3 t11 EMC1- R13 t12 EMC1-R13 t12 EMC1+ R13 t12 EMC2-R13 t12 EMC2+ HV Status since last ZEUS week Influence of beam injection / dump on HV settings Small trends of the level of 0.1-1% over half a year visible.

10. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents10 Influence of HERA on CAL Beam, trigger, HERMES affect kinematic distributions Sometimes difficult for CAL DQM to judge on data quality.

11. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents11 M.Jaworski, D.Reeder, W.Smith D.Kcira, A.Savin, L.Li A.Everett, P.Ryan, M.Rosin, E.Brownson, T.Danielson RCAL4 Iso_e: 95-97% instead of 98% not a hardware issue – modify DQM to identify problem Offline and online DQM jobs are running Include FCLR and “location check” in the DQM Old online machine ZAXP03 still can be used Two new Alphas are completely installed Detector side: 2x2 channels ½ height (cable) no 0’s TEC cards: 16 good, 8 bad TSC spare is o.k. 2 bad serial cables in BCAL: sometimes no shut for ½ module

12. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents12

13. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents13 HES Status of FHES FHES 11: repaired and re-installed in Dec ’04, end of Jan’05 one half ski (1/6 module) failed electrically  should be repaired in summer break. FHES 9, 10, 13, 15, 16 : monitored closely, all modules recovered, some half skis have high dark current, but are still biased  All modules completely working and read out ! Plan: take out, repair and re-install FHES modules 9, 10, 11, (not 13!), 15, 16 in the summer break. red/blue: ’97 installed modules  possibly tiny water leaks white: ’98 installed modules  no indications for water leaks green: ’01/’03 installed modules  no water leaks

14. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents14 HES Status of RHES: no major problem, few trips of HC3 power supplies few failures in half modules due to connection on power distribution card  check all modules in the summer break. Status of DAQ: no major problem run control modified, such that an automatic repetition is initiated in case the SETUP runs into a timeout:  much better performance, only two drawbacks to be improved. Summary  lots of troubles with the new cooling settings had to be solved  all “possibly leaky” modules in FHES recovered and working only few failures in the electronics in the meantime HES took good data continuously during the past months Ski – Cooling System: with the present pump-stand it was possible to lower the under-pressure even further:+0.2bar  -0.2bar  under-pressure over almost the full module height several problems: air-leaks to be found, air relief device not working, … anti-corrosive solvent added:  lots of problems with foam production blocking flow After a quite busy time now finally running stable !

15. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents15 SRTD Status (Roberval) What happened since Padova?Bad channel history since Padova Current situation:

16. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents16 S. Chekanov, W. Hain, H. Lim, S. Magill  Replaced: Fuses, power crates, readout cables, control cards  Problem reproducable in test stand with high temperature: serial data get quickly messed up if fans off! Chip that distributes signals on control car  Fan problem? Fans with control signals? Aging of control card chips – replace? DQM was moved to AFS Number of bad HV channels as in 8/2004: 14 (of 416)

17. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents17 Subcomponents Status I … basically no news! F/RCAL Presampler (no dedicated manpower):  FPRES south: problems in setting HV, no spares  FPRES (Wladimir): order of channels wrong in Adamo table? Has anybody ever used this?  RPRES okay  However, system has no dedicated man power; needs calibration etc.  Who is using which part of PRES? Historically only RPRES used?  Currently one bad channel. FNC (Info from Bill, Wladimir):  Test stand working, dubious front-end card needs inspection  Some FECs and the delay box need to be checked.  Sometimes giving problems in the readout (digital crate)  exclude from readout? LED for F/RCAL (Freiburg):  Not in use currently. Situation rather unclear.

18. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents18 Subcomponents Status II … basically no news! Laser (Roberval Walsh):  Not really trusted for calibration/monitoring purposes; however useful for readout debugging in some situations.  Currently switched off; some spares should have been replaced ages go. Money? Send to company?  Recently problems with LASER test triggers  excluded from test triggers. SRTDFLT (John Loizides): Situation unchanged; stable.

19. ZEUS Week DESY 2-3/2005TSS: CAL and Subcomponents19 Summary  CAL basically running stably with acceptable number of bad channels  Status of online and SlowControl systems is satisfactory  Calibration procedures are still getting more stable and automatized  Some severe problems in the past few months show vulnerability of the system. Sometimes external help necessary!  Computing (now maybe better under control)  Readout system  Manpower situation still satisfactory.  We would like 1-2 new CAL students.  Looking forward to welcome new DESY scientist in the CAL team.  One post-doc / designated student for HES would be appreciated.  Some subcomponents uncovered. How much effort can we / do we want to invest for PRES? FNC? LED? LASER?