sct testbeam: report & plans gareth moorhead (with thanks to lars eklund for being there for me)...

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 Week @ 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


Testbeam May - June 2003

Participants

Sophie Chouridou, Bettina Mikulec - CERNYohsei Iwata, Akiko Imoto - Hiroshima UniversityRyuichi Takashima - Kyoto University of EducationChristian Ketterer - FreiburgAllan Clark, Mariane Mangin-Brinet, Shulamit Moed - GenevaTom Atkinson, Gareth Moorhead - MelbourneReisaburo Tanaka, Youji Tomeda - Okayama UniversityPeter Kodys - Prague Charles UniversityStan Bentvelsen, Thijs Cornelissen, Sandra Muijs - NIKHEFPaul Dervan - SheffieldJose Enrique Garcia Navaro, Sergio Gonzalez, Marcel Vos - IFIC Valencia

Apologies to anyone forgotten



Schedule: 12 May - 05 June

Mon

Tue

WE

d Thu

Fri

Sat

Sun

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Mon

Tue

Wed

Thu

12 / 5

13 / 5

14 / 5

15 / 5

16 / 5

17 / 5

18 / 5

19 / 5

20 / 5

21 / 5

22 / 5

23 / 5

24 / 5

25 / 5

26 / 5

27 / 5

28 / 5

29 / 5

30 / 5

31 / 5

01 / 6

02 / 6

03 / 6

04 / 6

05 / 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)



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



Modules

Module Type Irradiated ? Comment

20220330200003 Barrel FULL; 10 Oct 2002 Irradiated unpowered, unbiased

20220170200153 Barrel FULL; 10 Oct 2002 Irradiated unpowered, unbiased20220170200010 Barrel No Large Negative Offset on 1 chip 20220170200447 Barrel No (goes to irrad) Large Gain Spread on 2 chips20220040200018 Barrel No (goes to irrad) Anchor; Large Oscillation module K5_312 Endcap Outer FULL K5_503 Endcap Outer FULL K5_504 Endcap Outer FULL K5_310 Endcap Outer HALF K5_303 Endcap Outer HALF k5_306 Endcap Middle No MPI/Prague

20220130000002 Endcap Outer No Geneva/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



Program

• One module as anchor (efficiency reference at 1 fC, 150 V), barrel 00010

• Standard performance studies at several positions across modules

• Threshold scans (Qthr) at bias combinations:Irradiated: 350 V, 500 V, 400 VUnirradiated: 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


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 wereoperated at Vcc = 3.8 V as no useful performance could be found atVcc = 3.5 V

• Noise in H8 (12 modules in proximity, no metal cover plates etc.) ~100 - 300 electrons worse than lab., as previously experienced

• Details, including all standard characterisations in lab., and beforeand after at H8, can be found at: http://atlas.web.cern.ch/Atlas/GROUPS/INNER_DETECTOR/SCT/tbMay2003/


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


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.

sct testbeam: report & plans gareth moorhead (with thanks to lars eklund for being there for me)...

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