run coordinator’s report 20-27 march 2006 thomas schörner-sadenius universität hamburg zeus...

RUN COORDINATOR’SREPORT 20-27 March 2006

Thomas Schörner-SadeniusUniversität Hamburg

ZEUS Monday MeetingDESY, 27. März 2006

DESY, 27.3.2006 TSS: Run Coordinator Report 2

SUMMARY

¶ Overall: – smooth data taking without major problems – still suffering from both proton- and electron-induced background problems

¶ Lumi this week: – HERA delivered: ~8.3 pb-1 – ZEUS gated: ~5.8 pb-1 – Largest fill: 1.02 pb-1 delivered – best fill: 81% efficiency

¶ Very smooth HERA operation: – Twelve fills – efficiency typically close to 80% – average efficiency 69%

DESY, 27.3.2006 TSS: Run Coordinator Report 3

HERA PERFORMANCE

¶ Instantaneous (specific) lumi up to 4.6*1031 (2*1030)

¶ Currents up to ~85 and 40 mA, respectively.

¶ Polarization going up to typically 37%.

DESY, 27.3.2006 TSS: Run Coordinator Report 4

HERA PROBLEMS

Monday: CTDtrips (p BG); early dump

Tuesday: Protons lost (magnet error)

New collimatorsettings bigimprovement

Wedneday: excellentBG situation – but many CTD trips (?)

Thursday: bad p BG

P lost Dust particle

Electrons lostreason unclear;then bad p BG

High e- BG

Electrons lost(tune control, temp alarm)

DESY, 27.3.2006 TSS: Run Coordinator Report 5

ZEUS PROBLEMS¶ Numerous small hick-ups … (many components with small DAQ problems, keeping busy, not handshaking, introducing dead time etc.).

¶ … but big disasters

¶ One word on shift crew motivation (true for both HERA and ZEUS):

– Please read the instructions before you come on shift (shift instructions, message from run coordinator, tasks of the moment, known problems)!

– Please talk to the previous shift crew and read the log book!

– … and make sure that there is always somebody in the control room!

– If in doubt call expert soon!

DESY, 27.3.2006 TSS: Run Coordinator Report 6

ONLINE DDL …¶ Uta reported on reconstruction error related to CAL tables since long.

¶ On Thursday Ulf and Sergei created new online data flow DDL to overcome problem. – First taking data … – then, late Friday night, suspecting problems and going back to old version. – Saturday morning going for new version (22) again.

¶ Reconstruction error does not occur anymore. Tables seem to be okay.

¶ But we cannot be 100% sure. Physics groups, please check the data, especially

the runs 58754, 58759 and 58763 which were reconstructed with the new code in the XP line. Please report if you find problems!

DESY, 27.3.2006 TSS: Run Coordinator Report 7

ZEUS PERFORMANCE

DESY, 27.3.2006 TSS: Run Coordinator Report 8

ZEUS PERFORMANCEMonday - wednesday

¶ Proton background giving problems until new collimator settings were tried late Tuesday.

DESY, 27.3.2006 TSS: Run Coordinator Report 9

ZEUS PERFORMANCEWednesday, thursday

¶ Improved background situation!

DESY, 27.3.2006 TSS: Run Coordinator Report 10

ZEUS PERFORMANCEFriday, saturday

DESY, 27.3.2006 TSS: Run Coordinator Report 11

ZEUS PERFORMANCESunday, Monday

¶More problems from the electron side (spikes, high base level).

DESY, 27.3.2006 TSS: Run Coordinator Report 12

ZEUS LUMINOSITY

DESY, 27.3.2006 TSS: Run Coordinator Report 13

LUMI/EFFICIENCY PER DAY

DESY, 27.3.2006 TSS: Run Coordinator Report 14

LUMI/EFFICIENCY PER FILL

DESY, 27.3.2006 TSS: Run Coordinator Report 15

LUMI LOST BECAUSE …

Electron background,DAQ problems

trips,DAQ problems

DESY, 27.3.2006 TSS: Run Coordinator Report 16

LUMI LOST BECAUSE …

DESY, 27.3.2006 TSS: Run Coordinator Report 17

EVENTS OF THE WEEKNC at Q2 ~ 30000 GeV2

DESY, 27.3.2006 TSS: Run Coordinator Report 18

EVENTS OF THE WEEKCC at Q2 = 23200 GeV2

DESY, 27.3.2006 TSS: Run Coordinator Report 19

EVENTS OF THE WEEKe* candidate

DESY, 27.3.2006 TSS: Run Coordinator Report 20

EVENTS OF THE WEEKIsolated photon , E = 178 GeV

DESY, 27.3.2006 TSS: Run Coordinator Report 21

EVENTS OF THE WEEKCC multijet, Q2 = 8000 GeV2

DESY, 27.3.2006 TSS: Run Coordinator Report 22

EVENTS OF THE WEEKDimuon event

DESY, 27.3.2006 TSS: Run Coordinator Report 23

EVENTS OF THE WEEKWe

DESY, 27.3.2006 TSS: Run Coordinator Report 24

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

John(for Monica)