SCT Testbeam: report & plans Gareth Moorhead (with thanks to Lars Eklund for being there for me) Uppsala 13 June 2003

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Contents Report on the recent beamtest 19 May to 02 June (most details to follow in Jose & Sergio's talk) Next beamtest: August - September 2003 –Dates not yet final due to SPS proton run extension 2004: Inner Detector Common Run –Advance warning

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Testbeam May - June 2003 Participants Sophie Chouridou, Bettina Mikulec - CERN Yohsei Iwata, Akiko Imoto - Hiroshima University Ryuichi Takashima - Kyoto University of Education Christian Ketterer - Freiburg Allan Clark, Mariane Mangin-Brinet, Shulamit Moed - Geneva Tom Atkinson, Gareth Moorhead - Melbourne Reisaburo Tanaka, Youji Tomeda - Okayama University Peter Kodys - Prague Charles University Stan Bentvelsen, Thijs Cornelissen, Sandra Muijs - NIKHEF Paul Dervan - Sheffield Jose Enrique Garcia Navaro, Sergio Gonzalez, Marcel Vos - IFIC Valencia Apologies to anyone forgotten

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Testbeam May - June 2003 Schedule: 12 May - 05 June MonTueWEdThuFriSatSunMonTueWedThuFriSatSunMonTueWedThuFriSatSunMonTueWedThu 12 / 513 / 514 / 515 / 516 / 517 / 518 / 519 / 520 / 521 / 522 / 523 / 524 / 525 / 526 / 527 / 528 / 529 / 530 / 531 / 501 / 602 / 603 / 604 / 605 / 6 Pre-characterisation in Irrad. Lab. (Christian) Installation at H8 & in-situ characterisation Beam tuning (Adrian Fabrice - Many thanks) Normal beam SCT priority 25ns beam MDT & TGC priority - 1st Level Trigger tests SCT, PIX, TRT, TileCal also running Post- characterisation Installation at H8 De-installation (Abbreviated from the original plan due to the PS startup problems and subsequent SPS "beam scrubbing" run)

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Testbeam May - June 2003 Schedule Two periods: 3 days of SCT priority with normal beam, 4.8 s spill length - Random trigger => TDC cut 10ns/25ns as usual (40% efficiency) 7 days of 25ns beam, multiple users, 2.6 s spill length (fewer events / spill) - Synchronous trigger => No TDC cut (all events in time - we hope !) - Included 1 day of SCT priority for magnet & material studies which excluded other users Multi-user periods worked reasonably well. Pixels relocated to NA45 (upstream position) to reduce conflicts Opportunities to use Magnet or low momentum beam were very limited

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Testbeam May - June 2003 Modules ModuleTypeIrradiated ?Comment BarrelFULL; 10 Oct 2002Irradiated unpowered, unbiased BarrelFULL; 10 Oct 2002Irradiated unpowered, unbiased BarrelNoLarge Negative Offset on 1 chip BarrelNo (goes to irrad)Large Gain Spread on 2 chips BarrelNo (goes to irrad)Anchor; Large Oscillation module K5_312Endcap OuterFULL K5_503Endcap OuterFULL K5_504Endcap OuterFULL K5_310Endcap OuterHALF K5_303Endcap OuterHALF k5_306Endcap MiddleNoMPI/Prague Endcap OuterNoGeneva/CERN Pre-qualification module 3 Barrel modules with anomalies - two will go after to Irradiation, and then Beamtest again in September 2 Barrels irradiated unpowered & unbiased 5 Irradiated endcaps - individual performance & also tracking study using 3 fully irradiated modules 1 pristine "Pre-qualification" outer endcap for comparison, plus a middle for interest

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Testbeam May - June 2003 Program One module as anchor (efficiency reference at 1 fC, 150 V), barrel Standard performance studies at several positions across modules Threshold scans (Qthr) at bias combinations: Irradiated: 350 V, 500 V, 400 V Unirradiated: 150 V, 300 V, 200 V Bias scans (Vdet) at thresholds: 0.9 fC, 1.0 fC, 1.1 fC, 1.2 fC, 1.5 fC... then the fun stuff... Relative timing adjustment (signal cable length): all modules +/- approx 3 ns Synchronous beam (25ns) timing scan - efficiency versus trigger cable delay Tracking studies at 180 GeV/c, magnet 0 A, 2500 A, 5000 A (~ 0, 0.8, 1.6 T) Low momentum multiple scattering study : 50, 20, 10 GeV/c pions Target studies, 10 mm Tungsten target immediately upstream of modules to look GEANT4 simulation

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Comments... SCTLV3 gave many problems... too many dead channels; several channels failed in service during the ~ 3 week continuous use The two barrel modules irradiated unpowered & unbiased were operated at Vcc = 3.8 V as no useful performance could be found at Vcc = 3.5 V Noise in H8 (12 modules in proximity, no metal cover plates etc.) ~ electrons worse than lab., as previously experienced Details, including all standard characterisations in lab., and before and after at H8, can be found at:

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala Next beamtest : September 2003 Currently scheduled: –SCT main or co-user run 28 Aug to 2 Sep –ATLAS Common DAQ run 3 to 8 Aug However, the Research Board has approved 2 week extension to compensate for the time lost due to the beam scrubbing run Likely but not certain we will have ~ 2 weeks in September including the Common DAQ run Program: - Standard studies of the modules irradiated during this year, including the Large Gain Spread barrel - Common DAQ run... minimal port of existing Mustard/Slog readout to ATLAS DAQ-1 to participate in common triggers

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala 2004 Last planned year of SPS beamtest Emphasis on ATLAS Integration testing –Common DAQ –Common clock & triggers >>> common events –Tests of Level 1 Trigger –Dataflow (ROD s-links to ROS etc.) –Event Filter –Offline software - reconstruction etc. Within this context, the Inner Detector is planning a combined Pixel / SCT / TRT common run.... Now in early discussion phase - please contact Gareth if interested in following developments.

G.F.Moorhead SCT Testbeam Update June 2003, SCT Uppsala