cal and subcomponents status overview t. schörner-sadenius hamburg university, on behalf of the cal...

CAL and SUBCOMPONENTS STATUS OVERVIEW

T. Schörner-SadeniusHamburg University, on behalf of the CAL group

ZEUS Meeting DESY28 February – 4 March 2005

ZEUS Week DESY 2-3/2005 TSS: CAL and Subcomponents 2

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)


Calorimeter Manpower IGeneral, 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 oneHES post-doc or

dedicated studentto backup Kerstin!


Calorimeter Manpower IIDQM 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) ArgonneF/RPRES, FNC, BCAL bases no dedicated manpower!Michele Sumstine Wisconsin (-03/2005)Andree Robichaud-V. McGill (-04/2005)Ying Cui Toronto Marcos Jimenez Madrid Avraam Keramidas NIKHEFGabriel Grigorescu NIKHEFCathy Farrow Argonne/DESYChangh Yi Zhou McGill

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QM

Exp

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Thanks to Michele andAndree and welcome to

Changh Yi!

We would appreciate oneor two new CAL students

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Current CAL Statusas of yesterday noon: v3959

It is reassuring to know that we are stable around 270 bad channels,if freshly calibrated …

FCAL BCAL RCAL Total

FEC 40 1 9 50UNO 37 133 14 184QINJ 4 13 5 22PED 6 5 0 11

Total 87 152 28 267

Two holes: B22, tower 4: UNO problemsB12, tower 8: UNO and QINJ


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!


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.


Bad Channel Historysince Padova weekNumber of bad channels

is more or less stable with270 or so (after calibration).

1-2 stable holes in BCAL 22and 22.

Some fluctuations inbetween due to localizedproblems, mostly solvedduring access days.

Many problems come andgo every now and then;especially in BCAL uncer-tainty of ~100 channels(B16, B29 etc.)

FEC

BC updates

Increase since shutdown Now stable

Localizedproblem solved

during access day.


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.


Influence of HERA on CALBeam, trigger, HERMES affect kinematic distributions

Sometimes difficult for CAL DQM to judge on data quality.


M.Jaworski, D.Reeder, W.SmithD.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 toidentify problem

Offline and online DQM jobs are runningInclude 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


HESStatus 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


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 !


SRTD Status (Roberval)What happened since Padova? Bad channel history since Padova

Current situation:


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)


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.


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.


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?

cal and subcomponents status overview t. schörner-sadenius hamburg university, on behalf of the cal...

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