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Update on Microstrip Detector R&D Johann Heuser, 6 October 2009

Update on Microstrip Detector R&D Johann Heuser, 6 October 2009. 2 nd full-size double-sided microstrip detector prototype Consortium GSI-CiS 2 nd radiation tolerant test structures GSI-CiS Prospects for other radiation hard detectors. Successors to:.

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Update on Microstrip Detector R&D Johann Heuser, 6 October 2009

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  1. Update on Microstrip Detector R&DJohann Heuser, 6 October 2009

  2. 2nd full-size double-sided microstrip detector prototypeConsortiumGSI-CiS2nd radiation tolerant test structuresGSI-CiSProspects for other radiation hard detectors

  3. Successors to: • 2 next full-size prototypes: r/o pin-compatible with each other • 60  60 mm • 1024 strips/side • 58 m pitch • 7.5 deg stereo angle • double metal on 2(1) sides 1) Full-size prototype CBM01 (rad soft) 2) CBM02 –rad tolerant designs 90° test detectors main detector 15° stereo angle 50 m strip pitch • Baby detectors + test structures: • for systematic studies • before/after irradiation and in-beam tests with readout electronics 4" wafer, 285 µm Si

  4. Status: Full-size prototype: 1) Consortium/MSU design final since Summer 2009 Production of 60  40 mm2 detectors ongoing at RIMST; dummy wafer (Al layers) produced 10/2009 (financed by STS Consortium) see overview of Y. Murin

  5. Full-size prototype: 2) Design 60  60 mm2at CiS  financed by GSI (~ 35 kEuro, within UF-FP7 ULISI)  ongoing  Complicated! Finished not before the end of the year production until Spring/Summer 2010 4" mask space for the big sensor + two baby detectors (?)

  6. Status: New "technology wafer": Accepted as BMWI-R&D project of CiS together with GSI (Jan/2009 – July 2011)

  7. Project with Helsinki Institute of Physics, Finland / CERNCBM test structures on 150 (300) m n-type MCz material: Thin single-sided microstrip detectors with AC coupled r/o strips

  8. 2 1 3 3 3 3 n-type 6” wafer 1. Wafer layout RD50 wafer: Two CBM test structures with p-strips in n material would fit in a "half moon" area, plus a few pin diodes etc.: • CBM test object for thin inter-mediate STS-MVD station:Single-sided wedge detector, r-strips, 25/50/100 m pitches,in 3 groups of 128 strips, AC r/o • CBM test object for thin&single-sided detectors, compatible with current baby detectors:Single-sided small baby sensor, 50 µm pitch, 256 strips, AC r/o • Main sensors, 50 µm pitch, • 768 strips (J. Härkönen, RD39/50)

  9. 2. Wedge layout • 30º sector • 2 AC pads + 1 DC pad per strip for test purposes • Try out 3 various strip pitches • Each group of strips is compatible with n-XYTER FEB + Al/Kapton pitch adapter cable (tab-bonded) Schematics of arrangement of strips on the wedge poly bias DC pad AC pad 128 strips, 100 µm pitch 128 strips, 50 µm pitch Close-up of the wedge corner. Bias structures/AC pads on alternating sides of the wedge. 128 strips, 25 µm pitch

  10. 3. “Baby” detectors With 50 m strip pitch, 256 strips do fit the interior region of the detector, including guard and bias rings. The external dimensions specified fit already existing CBM test boards. The strips themselves could most likely be identical to those of Jaakko's detectors.

  11. Current status: • will not be realized on the RD50 wafer (due to cost reasons) • but on a separate wafer, to be built at VTT, Espoo, Finland • funding has been applied for in Finland, with a finish foundation • production ... open, goal: in 2009 • no further progress since last report March/2009 • not clear when/whether this will converge

  12. Ioffe Physical-Technical Institute, St. Petersburg • V. Eremin et al. • interest in joining CBM • motivation: application of its long-term experience in physics and development of silicon radiation hard detectors. • Two tasks for the participation are proposed: • Complementary radiation study which will accompany the STS double side detectors (DSSD) development, prototyping and mass production, development of operational scenario for the STS DSSDs. • Development of alternative Technologically Effective Approach for the STS detectors based on thin single sided microstrip detectors (SSSD) and future fabrication of pilot set of the detectors. • under discussion in CBM-MPD STS Consortium and ...

  13. Detector device simulations Software packages have been set up Now ready to be directed to CBM specific R&D problems back up design at CiS and coming irradiation studies  see talk by Sudeep Chatterji

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