1. RUN COORDINATOR’S REPORT Thomas Schörner-Sadenius (UHH) On behalf of the run coordinators’ team: E. Gallo (left the team), J. Loizides, M. Turcato, R. Walsh ZEUS Collaboration Meeting DESY, 27 February – 3 March 2006

2. DESY, 28.2.2006TSS: Run Coordinator’s Report2 OUTLINE ¶ HERA and ZEUS performance since last collaboration meeting (8-12 October 2005, Amsterdam) ¶ Status of components (not trigger) ¶ Conclusions and outlook

3. DESY, 28.2.2006TSS: Run Coordinator’s Report3 HERA PERFORMANCE Good data taking before shutdown Running periods - Running from 12 October to 14 November 2005 - After shutdown first COSMIC on 14/2, first PHYSICS on 17/2. Lumi 2005 - Good luminosity up to 5*10 31 cm -2 s -1, specific up to 2.2*10 30 cm -2 s -1 mA -2. - Satisfactory background situation. Polari- sation ‘05

4. DESY, 28.2.2006TSS: Run Coordinator’s Report4 HERA STARTUP In february 2006 Currents - Initially problems with electron injection and with lumi creation at ZEUS. - But within one week up to 25 mA of electrons and 65 mA of protons. Lumi - luminosity up to, peak up to 2.6*10 31 cm -2 s -1. - specific lumi up to about 2.5*10 30 cm -2 s -1 mA -2. Electrons currently limited to 25mA. Also low electron injection efficiency.

5. DESY, 28.2.2006TSS: Run Coordinator’s Report5 HERA STARTUP In february 2006 Bunches Currently running on 120 bunches. Soon: 150 bunches with 80/35mA. Background 15-20. February: electron BGLast 7 days: electrons coming down Dominated by synchrotron radiation BG (bad electron vacuum upstream)?

6. DESY, 28.2.2006TSS: Run Coordinator’s Report6 HERA STARTUP Background continued 15-20. February: electron BG Good fills lately.

7. DESY, 28.2.2006TSS: Run Coordinator’s Report7 ZEUS EFFICIENCY since startup: suffering from background; HERA hickups

8. DESY, 28.2.2006TSS: Run Coordinator’s Report8 ZEUS EFFICIENCY since startup: suffering from background; HERA hickups

9. DESY, 28.2.2006TSS: Run Coordinator’s Report9 OUTLINE ¶ HERA and ZEUS performance since last collaboration meeting (8-12 October 2005, Amsterdam) ¶ Status of components (not trigger) ¶ Conclusions and outlook

10. STT/Magnet-Repair Based on Carstens temperature model, the STT/Magnet repair was done  installed cooling pipes on frustrum surface temperature modell w/o cooling temperature modell with cooling  Copper pipes, 15 mm x 1 mm, flattened   72 meters of pipes installed  Three independent curcuits S. Goers

11. DESY, 28.2.2006TSS: Run Coordinator’s Report11 Position of temperature sensors Temperature monitoring and stability  temperature stable in time Note the scale!  constant temperature distribution around/along detector Safety scheme: Depending on - temperature reading of sensors (above certain threshold) - no cooling water flow (sensors still to be installed) the STT Slow control will switch off the Low Voltage (Temperatures also available via Netmex)

12. DESY, 28.2.2006TSS: Run Coordinator’s Report12 STT-Readout Recabling of STT-Readout done: we now use four transputer links instead of one  substantial increase of bandwidth Furthermore (honestly: as before) Cut on crate level can be applied to reduce/cut STT data volume  waiting for data to learn about trigger rates and event sizes  adjust cuts to optimize data-taking efficiency Online-machines (zulu9 & zulu19) upgrades to Scientific Linux 3  recompiling of code ongoing FTD: no changes Detector: fine Readout: fine Data: fine Dear Deputy: please don‘t forget to check FTD & STT histograms in hip zulu19 recently broken (TSS)

13. DESY, 28.2.2006TSS: Run Coordinator’s Report13 CTD STATUS J. Loizides, J. Ferrando 1) HV status - stable, exchanged old UPS for new. We now have 2 spares (The system uses 5 UPSs) 2) GAS status - New Spare flow controller for Argon will be installed soon 3) Readout status - Considerable work on recovering dead channels, now we have approx 30, before we had 130. This is the best since 1996. We have 10 "new" spare TRAMs for the Transputer network taking our total to 12. These are critical components which normally fail at the rate of 1-2 per year, barring power failures. 4) Endplate temperature - New web page showing CTD temperature monitoring, updated hourly: http://www-zeus.desy.de/~ctd/temps/ 5) CTD SLT- the CTD SLT is off, no data is sent, replaced by GTT 6) All CTD DQM for 2006 e – data is ok.

14. DESY, 28.2.2006TSS: Run Coordinator’s Report14 The MVD is fine! T. Haas

15. DESY, 28.2.2006TSS: Run Coordinator’s Report15 MVD Shutdown Activities Aim: Make MVD handling more stable and user-friendly! Upgrade to ADC eproms (A. Polini, K. Tokushuku, A. Polini) Bug identified in November → MVD holding busy when data rate is high First version tested in December Final version goes in this week DAQ System upgrade (A. Polini, C. Youngman) 25 nodes/2 Terabytes SUSE 8. 5 → Scientific LINUX 3 (SL3) Consolidate DAQ network (C. Youngman) Gain more ports DESY compliant solution LV (R. Carlin, T. Haas, C. Youngman, A. Zampieri) Goal: More reliable operation of HELIX Raise LV from ±2.0 V to ±2.1 V Cooling System (C. Youngman) SPICAN reset can now be done automatically when needed. HV (C. Youngman + Praktikant) Scanned 50 – 90 V Depletion voltages. Results look promising but studies are still ongoing. DQM (E. Lobodzinska, G. Watt) Complete port to SL3 Major Cleanup

16. DESY, 28.2.2006TSS: Run Coordinator’s Report16 MVD Status IV runs vs time Leakage Current (nA) Bad Channels Signal (ADC) Testpulse runs Physics runs Leakage current constant; radiation damage under control Number of bad channels constant(?) Effect of raising LV (2V  2.1V.

17. DESY, 28.2.2006TSS: Run Coordinator’s Report17 CAL Overall Status Overall status is fine, but situation is not stable and problems will appear from time to time. During the shutdown a lot of effort was put into the CAL in order to get it into the best possible shape before restarting BCAL: improvement of HV, clock and serial lines, and PMT bases FCAL: after moving onto extensions recabled everything and got it into the same stable situation as before the shutdown After shutdown CAL had no holes and only 200 bad channels But before the start of the data taking some old problems (mainly BCAL) which were thought to be fixed showed up again Will work on it during access day CAL was not moved the last couple of month before the shutdown Problems due to bad cables decreased, no significant deterioration of cells close to beam pipe observed Will not move CAL until further notice, CAL group is monitoring HV development closely Ingrid-Maria Gregor, DESY, CAL summary

18. DESY, 28.2.2006TSS: Run Coordinator’s Report18 HES Shutdown Work Pull F11 & F10  repair in Mark J hall One week de-cabeling with ≥ 3 people CAL  extension rails Pull F9 & F15 & F16  repair in Mark J hall Re-install F11, F15, F16, F9 and finally F10 directly check modules afterwards CAL  from extension rails Re-cabling one week with ≥ 3 people First complete switch on Testing & repair & testing & repair & testing & repair & testing & repair & testing & repair... Exchange of lots of analog cards, ski control systems, digital cards and one power supply, the link switch for RHES and installation of further noise improvements Switch off and wait for lumi data taking Switched on, running fine now since one week 22nd of Dec  well ahead of schedule ! 3rd of Jan  17th of Jan  19th of Feb  Kerstin Borras, ZEUS CM Feb’06

19. DESY, 28.2.2006TSS: Run Coordinator’s Report19 Status of BMUON detector (Slide from R. Brugnera) In general, BMUON is running smoothly, but A problem with a trigger card has produced high trigger rates in the rear region, now almost solved. Problem with the readout of a inner barrel chamber, we hope to fix during this access. Due to its oldness, the component has necessity of continuous repair works in order to be in a safe state. Software: mbtake.fpp available in runlib, updated up to the end of 2005 BMUON efficiency simulation package up to 2005 available both for ORANGE-users and EAZE-users Modifications to the BREMAT and MBRECON packages almost completed and ready to become public

20. DESY, 28.2.2006TSS: Run Coordinator’s Report20 FMUON STATUS (provided by A. Polini) A. Polini

21. DESY, 28.2.2006TSS: Run Coordinator’s Report21 Repairs and improvements during shutdown should have positive impact on data quality. The most important among them were:  Replacement of bad photomultipliers in the counters which are close to the beam pipe  Producing and implementing some electronics board to the bad discriminators channels  Improving some HV cable extender connections  Repair of low voltage outputs of HV divider  Repair of spare HV divider  Tuning of HV for several photomultipliers. Currently the Veto Wall is in good shape, we have 4 not working channel located in outer part of the Veto Wall area. The most urgent problems are:  Extremely high rates produce by bad background condition.  Not working SLT Level of the Veto Wall readout chain during physics runs (Under investigation). This is not affecting GFLT level so veto is sending correctly. Detector sideTunnel side VETO ACTIVITIES AND STATUS In good overall shape. J. Malka

22. DESY, 28.2.2006TSS: Run Coordinator’s Report22 BAC ACTIVITIES AND STATUS P. Plucinski

23. DESY, 28.2.2006TSS: Run Coordinator’s Report23 BAC ACTIVITIES AND STATUS ctd’  energy (GeV) efficiency + trigger (TLTBAC) + offline (MUBAC)

24. DESY, 28.2.2006TSS: Run Coordinator’s Report24 MAGNETS STATUS (provided by D. Notz) 6. Floor, SPS for (de)grounding The following signals are now visible in the control room: ¶ grounded magnets (“Geerdet”) ¶ Ungrounded magnets (“Enterdet”) ¶ PS off (All PS off) ¶ Release not available (“Freigabe fehlt”) Control Room

25. DESY, 28.2.2006TSS: Run Coordinator’s Report25 MVD Radiation Monitor Diode 14 is off as before (dead); All other diodes are working fine! Diodes 10 & 15 could be recovered after shutdown. New readout board: Was sucessfully installed by E. Borsato and F. Dalcorso. A. Longhin is working on the software. Diodes 1,2,3,4 are used for testing it. (They have been masked.) Next: Temperature corrections will be redone. HIP histograms go sometimes crazy due to interference of the two readout programs for radfets and new radmon board. A. Polini is looking into it. RadFETs C. Horn

26. DESY, 28.2.2006TSS: Run Coordinator’s Report26 LUMI STATUS o Online - PCAL activities during the shutdown + replaced some cables and temperature sensors + PCAL covered by additional lead blocks (from proton beam) - No hardware problems since last collaboration meeting (except Trigger Board reset button) - not necessary to mention :) - LUMI DQM available in HIP server - Testing the readout electronics linearity of the PCAL showed discrepancies wrt to the last such test  needs to be further investigated. o Offline - No changes in data quality - Egas bremstrahlung spectrum needed for cross check (electron only running) M. Gil

27. DESY, 28.2.2006TSS: Run Coordinator’s Report27 MORE … … not covering all components ¶ Trigger, DAQ, more on CAL  see talks in this session. ¶ 6m Tagger – 6m tagger now included in MOZART; noise etc. still have to be added. – Studies for use in F L analyses are under way. ¶ C5. – Currently fighting problems with VME controller. ¶ …. More in tomorrow’s “detector status, offline and analysis” session.

28. DESY, 28.2.2006TSS: Run Coordinator’s Report28 OUTLOOK Great data to come! ¶ HERA startup promising: – number of problems acceptable; – backgrounds mostly under control; – so far good currents and lumi. ¶ ZEUS is more or less stable; more and more components seem to suffer from ageing. ¶ Looking forward to one more year of high lumi, high statistics, high quality data!

29. DESY, 28.2.2006TSS: Run Coordinator’s Report29 CFLTp Status S. Chekanov, J. Loizides, S. Miglioranzi, D. Nicholass, A. Pellegrino Input cards 3 Spares: 1 at Jade Hall, 2 at ZEUS Comm Cards 1 new spare at Jade Hall in System, used for tests. 1 old card at ZEUS. Comments Spare status is unchanged from previous meeting.