CAL OVERVIEWand

DATA QUALITY REPORT

T. Schörner-SadeniusHamburg University

ZEUS Meeting DESY28 February – 4 March 2005

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 2

Outline

CAL (Wo)Manpower situation

CAL status: Overview, Problems, and general stuff see also contributions by Wladimir and Bill

Detailed CAL DQM situation

CAL subcomponents statusSRTD, SRTDFLT, PRES, F/R PRES, FNC, LED, LASER see also contributions by Roberval, Sergei etc.

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 3

Calorimeter Manpower IGeneral, Coordination

Merging of CAL and HES groups slowly progressing CAL DQM shifters now also do HES DQM checks On coordination / expert side no progress yet.

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 take over CAL coordination within few months.

Request for oneHES post-doc tobackup Kerstin!

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 4

Calorimeter Manpower IIIn more detail

Subcomponents (F/RPRES, FNC/FNT) (not) running

without dedicated manpower

DQM Coordinator Thomas Schörner HHInfrastructure Wladimir Hain DESYNEVIS and FE Electronics: Bill Schmidke ColumbiaHardware Joker: Cathy Farrow

Argonne/DESYLASER: Roberval Walsh McGillSRTD: Roberval Walsh McGillLED: Didar Dobur FreiburgB-PRES: S. Chekanov + H. Lim

Argonne/DESYSRTDFLT: John Loizides (CFLT) Argonne

(BCAL Bases: Ryan Hoffman Penn State Univ.)

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 5

Calorimeter Manpower IIICAL DQM Experts

Andree Robichaud-Veronneau McGill until AprilYing Cui Toronto Marcus Jimenez Madrid Avraam Keramidas NIKHEFGabriel Grigorescu NIKHEFCathy Farrow Argonne/DESYChangh Yi Zhou McGill Welcome!Michele Sumstine Wisconsin until March

Soon only 5 (+Cathy) left, with somewhat unclear time scalesto be discussed. We are therefore looking for at least one newCAL Student starting rather soon.

Still satisfactory situation; currently eight potential shifters, but …

Thanks Michele (and soon Andree) for long and good services to the CAL!

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 6

DQM Expert Activitiesperformed by CAL students

Andree: Improvement of DQM check plots (test triggers).(Almost) done, thanks!!!

Marcus: DQM for F/RPRES, just starting!

Ying: Halo muon events for HES (+CAL) efficiency monitoringFirst steps done, need to follow up.

Kjung Yu: HES studies

CAL (and HES) people should sit down together Identify important tasks that could be handled by students. Where can we still make things simpler, safer, more automatic? We (I) need to spend more time on training – many problems in standard situations! Join efforts with energy reconstruction / F2 working groups?

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 7

CAL Overall Status… where are we?

Remember: Shutdown last summer was successful First calibration after shutdown had only 220 bad channels

Currently, we can be as good as 275 or so bad channels This is basically unchanged since weeks. We often had rather many holes (2-4), which was not the case before.

More difficult to get calibration time One or two holes are old acquaintances (B22 tower 4)

Fight for calibration time gets harder With HERA running stably, less long-enough breaks for full

calibrations. Have to get used to calibrate during the night again. Procedures more automatic? To be performed by shift crew?

See later slides for detailed DQM overview.

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 8

CAL Overall StatusMain 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 thanks to

Alessandro! Major problems with DQM PCs – again, Alessandro teached me a lot. 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. Kutanski’s intervention more or less stable.

Luckily there is always somebody who knows more than I do!Thanks especially to Alessandro!

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 9

Bad Channel Historysince Padova week

• Number of bad channels is more or less stable.

• trend in BCAL

• Some of the gain of the last shutdown lost again.

• Some fluctuations in between due to localized problems, mostly solved during access days.

• Many problems come and go every now and then

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 10

Status since last ZEUS weekoverview on bad channels

Increase due todying PMTs.First strong rise aftershutdown, now stable.Spread: Missing

calibration oppor-tunities.

RCAL pipelinegain problems

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 11

Status since last ZEUS weekComparison with last CAL meeting

Shutdown 2004

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 12

F13 t12 EMC1- F13 t12 EMC1+

F3 t11 EMC1- F3 t11 EMC1-

R13 t12 EMC1- R13 t12 EMC1+

R13 t12 EMC2- R13 t12 EMC2+

HV Status since last ZEUS weekInfluence of beam injection / dump on HV settings

Small trends of the level of 0.1-1% over half a year visible.

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 13

Influence of HERA on CALBeam, trigger affect kinematic distributions a lot

Sometimes difficult for CAL DQM to judge on data quality.

Off-momentum positrons

Often even much strongerpeaks in single variables.

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 14

Subcomponents Status I… basically no news!

SRTD (Roberval Walsh): See Roberval’s report

SRTDFLT (John Loizides):Situation unchanged; stable.

LED for F/RCAL (Didar Dobur): Not in use currently. Situation rather unclear.

Laser (Roberval Walsh): Not really trusted for calibration/monitoring purposes. Is currently switched off. Recently problems with LASER test triggers excluded from test

triggers.

Barrel Presampler (S. Chekanov, H. Lim, S. Magill): See Sergei’s report.

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 15

Subcomponents Status II… 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? RPRES okay, however not in SC (moved to `masked’ directory due to

FPRES failures). RPRES no readout bad channels; maybe some bad PMTs. However, system has no dedicated man power; needs calibration etc. Who is using which part of PRES? Historically only RPRES used?

FNC (Info from Bill, Wladimir): Test stand working, dubious front-end card needs inspection Delay box gave problems in the past, needs to be checked. Sometimes giving problems in the readout (digital crate)

exclude from readout?

ZEUS Week DESY 2/2005 TSS: CAL Overview and DQM 16

Summary CAL basically running stably with acceptable number of

bad channels.

Some severe problems in the past few months show vulnerability of the system. Sometimes external help necessary!

Manpower situation still satisfactory. We would like 1-2 new CAL students. Looking forward to welcome new DESY scientist for CAL

coordination. Some subcomponents uncovered. How much effort can we / do

we want to invest for PRES? FNC? LED? LASER?

Reminder from last talk / shutdown: Spare situation getting critical, for example FCAL EMC PMTs.