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Johann M. Heuser, GSI Darmstadt CBM Collaboration Meeting JINR Dubna, 16 October 2008

CBM. Status of the Silicon Tracking System. Johann M. Heuser, GSI Darmstadt CBM Collaboration Meeting JINR Dubna, 16 October 2008. Joint STS-MVD Workgroup Meeting. Wide range of topics/activities: Simulation studies refined ... Detector R&D ... First in-beam test ...

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Johann M. Heuser, GSI Darmstadt CBM Collaboration Meeting JINR Dubna, 16 October 2008

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  1. CBM Status of the Silicon Tracking System Johann M. Heuser, GSI Darmstadt CBM Collaboration Meeting JINR Dubna, 16 October 2008 J.M. Heuser − Status of the Silicon Tracking System

  2. Joint STS-MVD Workgroup Meeting Wide range of topics/activities: Simulation studies refined ... Detector R&D ... First in-beam test ... R&D on module demonstrators ... System engineering ... Project planning ... IMoU – first draft ... J.M. Heuser − Status of the Silicon Tracking System

  3. STS Detector - simulations • - low-mass • - 8 tracking stations • - full azimuthal angle coverage • - polar angle coverage: • from 2.5° to 25° • high track density in inner region • high collision rate • vertical magnetic field talk by R. Karabowicz J.M. Heuser − Status of the Silicon Tracking System

  4. Stations: Overlaps vs gaps gaps Example:station #3 at z=40cm 39.65 40 40.35 overlaps intermediate J.M. Heuser − Status of the Silicon Tracking System

  5. Tracking efficiency Overlaps Gaps overall efficiency 1 gap, 2 gaps 1 overlap, 2 overlaps do not change tracking efficiency do change tracking efficiency Work done by the GSI Summer Student Maksym Zyzak from National University, Kyiv J.M. Heuser − Status of the Silicon Tracking System

  6. Momentum resolution Overlaps Gaps overall resolution 1 gap, 2 gaps 1 overlap, 2 overlaps do not change momentum resolution do change resolution Work done by the GSI Summer Student Maksym Zyzak from National University, Kyiv J.M. Heuser − Status of the Silicon Tracking System

  7. Realistic detector response Hit density Cluster length 1.4-2.3 strips 0-31 hits/cm2 Hit finding efficiency Strip occupancy 54-99% <eff> = 91.9% 0-11% J.M. Heuser − Status of the Silicon Tracking System

  8. Main sensor Double-sided, 1024 strips per side, 50 µm pitch, 15º stereo angle, full-area sensitive, size: 5656 mm2 “Baby” sensors Double-sided, 256256 strips, orthogonal, 50(80) µm pitch, size: 15.615.6 mm2 Detector R&D: CIS-GSI wafer CBM01 4" wafer, 285 µm n-type Si double metal layer CBM01B1 CBM01B2 CBM01 J.M. Heuser − Status of the Silicon Tracking System

  9. GSI: Quality test of AC strip insulation A. Lymanets CBM01B2: DC-pad, bias pad Test series AC-pad, bias pad AC-DC neighboring AC pads Probe station at DiamondLab, GSI Procedure: applied 1 V with contact needles, measured the current  resistance derived Probe station in MVD Group, IKF Frankfurt J.M. Heuser − Status of the Silicon Tracking System

  10. R (Ω) Detector type: CBM01B2 Wafer: 270529-4 10 k AC-bias ring insulation p-side strip # first part of production (almost) good  selected for test boards/beam test R (Ω) AC-bias ring insulation n-side Warm thanks to summer student Andrzej Wilczek, Kattowicz, for help strip # J.M. Heuser − Status of the Silicon Tracking System

  11. R (Ω) Detector type: CBM01B2 Wafer: 270529-19 10 k AC-bias ring insulation p-side strip # R (Ω) second part of production bad  n-side AC-DC insulation strip # J.M. Heuser − Status of the Silicon Tracking System

  12. IHEP Protvino — Test of CBM01 main detector A. Vorobiev CBM01 – so far results from n-side ... work in progress J.M. Heuser − Status of the Silicon Tracking System

  13. CIS-GSI "technology wafer" CBM02 At GSI: 5  8 baby detectors a la type "B2" 2 tested so far on AC insulator quality: OK more to be tested A. Lymanets J.M. Heuser − Status of the Silicon Tracking System

  14. Detector tests at KINR Kiev V. Pugatch CBM01-B2-sensor 50,7 μm – pitch Double-sided Sensor is glued to the AEROPLAST Carbon fiber supporting frame Microcables are bonded to sensor pads: Even strips – to one side; odd strips to the opposite side LEMO connectors are soldered by wires to large pads on microcables J.M. Heuser − Status of the Silicon Tracking System

  15. Module support frame studies Micro cables Cooling infra-structure J.M. Heuser − Status of the Silicon Tracking System

  16. Laser test setup at KINR 4th year students from Kiev University – Measuring η-function For the CBM-01 sensor J.M. Heuser − Status of the Silicon Tracking System

  17. Detector design @ SINP-MSU • Sensor size 62.0 (?) X 42.0 mm2 • Active area 59392 (60416) X 40000 mkm2 • Number of strips on both sides – 1024 • Strip pitch – 58.0 mkm (59 mkm) • Stereo angle - ±7.5o • P-side – double metal with short strips connection • N-side single metal M. Merkin J.M. Heuser − Status of the Silicon Tracking System

  18. R&D ON MICRO-CABLES FOR BABY SENSOR RADIATION TEST MODULE S. Borshchov demonstrator 0b ... produced demonstrator 1 Wire-bonding (Pitch 50.7um) Sensor Double-deck analog cable TAB-bonding (Pitch 120um) Front-End Board J.M. Heuser − Status of the Silicon Tracking System

  19. First CBM Detector System Beam Test Parasitic to the HADES beam time: 8h*) 2.3 GeV proton beam Location: GSI, Cave C J.M. Heuser − Status of the Silicon Tracking System

  20. Testbeam Setup • 3 CBM experiments (STS, GEM, FPGA + DAQ) • 1 standalone PANDA experiment (DIRC) beam diagnostics box design and construction: W. Niebur, GSI J.M. Heuser − Status of the Silicon Tracking System

  21. STS Test Setup – "Plan A" reference tracking station postponed to 2009 CBM01B1 CBM01B2 CBM01 J.M. Heuser − Status of the Silicon Tracking System

  22. CBM01B2 test detectors, GSI-CIS 8/2007 4" wafer, 285 µm Si mounted on test boards 32 strips to connector CBM01B1 CBM01B2 CBM01 first multi-purpose tool for detector tests, 2/2008 J.M. Heuser − Status of the Silicon Tracking System

  23. STS Test Setup – "Plan B" FEB1nxGen rev. B FEB1nxGen rev. B 32 of 64 ch 32 of 64 ch 32 of 64 ch 32 of 64 ch ROC pos. signals CBM01B2 Test board 32 strips bonded on p-side CBM01B2 overlap area strips p-n side: 1.6 × 1.6 mm2 32 strips bonded on n-side neg. signals J.M. Heuser − Status of the Silicon Tracking System

  24. Preparation of STS test beam box – September 2008 Holders of two microstrip detector test boards (10 cm  10 cm) and two front-end boards (one mounted board shown). rotation w.r.t. beam: study of cluster size Al box, 40 cm  40 cm  20 cm. Covers removed. Legs ~ 50 cm high lift the box from a table to the beam line. Mechanics designed and prepared by Wolfgang Niebur et al., GSI J.M. Heuser − Status of the Silicon Tracking System

  25. on the beam line: 2 detectors CBM01B2 2 FEB-1nx-gen rev B 2 ROCs power supplies J.M. Heuser − Status of the Silicon Tracking System

  26. Successful test of CBM prototype detector systems with self-triggering read-out electronics using proton beams atGSI, September 28-30, 2008 GSI and AGH Krakow KIP Heidelberg VECC Kolkata 2 Double-sided silicon microstrip detectors Double and triple GEM detectors Radiation tolerance studies Full readout and analysis chain: Go4 online Detector signals Analysis Front-end board with self-triggering n-XYTER chip Data Acquisition System Readout controller offline

  27. Detector commissioning: Operation on the beam line: 90Sr -spectra ... Correlation of fired channels in two silicon microstrip detectors ... in several channels of a silicon microstrip detector ... and in a GEM detector Beam spot seen on a GEM detector (every 2nd channel read out) Participants: GSI, Darmstadt, GermanyJINR, Dubna, RussiaKIP, Heidelberg, GermanyVECC, Kolkata, IndiaAGH, Krakow, Poland www-cbm.gsi.de

  28. J.M. Heuser − Status of the Silicon Tracking System

  29. The Data http://cbm-wiki.gsi.de/cgi-bin/view/Beamtime/BeamTimeGsiSep2008Data 29 runs 50 GB Data digging into the data just beginning ... ... first STS plots by P. Nomokonov, JINR;... presentation by R. Karabowicz J.M. Heuser − Status of the Silicon Tracking System

  30. Engineering of STS module demonstrators and stations S. Igolkin J.M. Heuser − Status of the Silicon Tracking System

  31. R&D on STS system integration S. Belogurov, A. Semennikov J.M. Heuser − Status of the Silicon Tracking System

  32. R&D cooperations, tasks CBM-MPD STS Consortium:2008 - 2010 JINR-SINP-KRI-SPbSU-SESRITIIE-BTI-IHEP-GSI FP7 HadronPhysics2 JRA: 9/2007Proposal: “Ultra-thin silicon tracking and vertex detection systems“ 2009-mid 2011 spokesperson: J.H. ... 3 sub-projects ... accepted by HadronPhysics2 ... accepted by EC ... finalization of contract awaited ... start Jan. 2009 R&D on demonstrators of the CBM STS module ... very active research program therein embedded: ISTC project # 3540: “CBM Silicon Tracker“ (GSI, KRI St. Petersburg, MSU Moscow, IPHC Strasbourg) Finnland:FAIR member state, in-kind contribution to CBM, PANDA, EXL, R3B "single or double-sided rad-hard microstrip detectors" project under definition GSI R&D cooperations: GSI-Kiev Inst. for Nucl. Research J.M. Heuser − Status of the Silicon Tracking System

  33. Summary • Many research activities on the STS ongoing: • ... from simulations ... over detector R&D ... to system design ... • True milestone reached: First successful in-beam system test • Project planning progressing for the R&D phase up to the TDR • Groups and tasks are forming • IMoU – first draft existing • Important motivation for our work: CBM needs the STS available from "day-1 physics" at SIS100 • (see Peter Senger's introductory presentation, 14.10.2008) J.M. Heuser − Status of the Silicon Tracking System

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