RUN COORDINATOR’SREPORT 13-20 March 2006

Thomas Schörner-SadeniusUniversität Hamburg

ZEUS Monday MeetingDESY, 20. März 2006

DESY, 20.3.2006 TSS: Run Coordinator Report 2

SUMMARY

¶ Probably my first run coordinator week without major (or only minor) desasters. – access, cooling, evacuation, fire …

¶ Lumi this week: – HERA delivered: 4.88 pb-1 – ZEUS gated: 3.26 pb-1 – Largest fill: 1.02 pb-1 delivered – best fill: 91% efficiency

¶ Two very nice fills, else suffering from backgrounds or ZEUS problems; – sometimes efficiency below 50% – average efficiency 66%

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HERA PERFORMANCE

¶ Instantaneous (specific) lumi up to 4*1031 (2*1030)

¶ Currents up to 87 and 37 mA, respectively.

¶ Polarization going up to almost 40%.

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HERA PROBLEMS

Tuesday:- proton injection problems- e- transmitter problems- Temperature alarms north- bad e- injection efficiency- feedback system …- rather bad backgrounds

Wednesday:- proton magnet PS+cooling 2 short breaks- then p lost during ramping.- H1 e- dump

thursday:- bad backgrounds- “conflict” between H1 VFPS and ZEUS conditions (orbit).

saturday:- temperature alarm WR e- dump after lumi declaration- lifetime problems.

sunday:- computer problems no electrons.

today:- beam loss because of sender east-right.

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ZEUS PROBLEMS¶ VETO wall excluded because of problem with GSLT interface card.

¶ FMUON: – some readout problems excluded for large parts. – water leak on Sunday excluded.

¶ FTD/STT: few times in error after activate, stuck in trans

¶ CAL: – stuck in trans, a few times “no busy response from CAL” – once RCAL transputer not reachable, BCAL digital crate off.

¶ HES: hc3 PS trip module R17 silent needs access.

¶ CDAQ: two times Ulf had to restart processes (FLINK, run number server)

¶ MVD: “SC_ALIGN_INSERT” process needed to be restarted.

¶ CTD HV program crashes (2)

¶ one noisy CFLT channel causing slightly high deadtime.

¶ BAC causing high deadtime new calibration needed.

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ZEUS PERFORMANCE

¶ … and on top of that bad backgrounds from time to time … – proton-induced – synchroton radiation

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ZEUS PERFORMANCEMonday, tuesday

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ZEUS PERFORMANCEWednesday, thursday

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ZEUS PERFORMANCEThursday, friday

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ZEUS PERFORMANCESaturday, Sunday …

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ZEUS LUMINOSITY

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LUMI/EFFICIENCY PER DAY

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LUMI/EFFICIENCY PER FILL

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LUMI LOST BECAUSE …

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EVENTS OF THE WEEKNC at Q2 = 6704 GeV2

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EVENTS OF THE WEEKCC at Q2 = 17000 GeV2

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EVENTS OF THE WEEKCC at Q2 = 5235 GeV2

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EVENTS OF THE WEEKNC at Q2 = 13140 GeV2

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NEXT WEEK …… your friendly run coordinator on duty is …

Me again …