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GEM Detectors for AnDY Nilanga Liyanage University of Virginia

GEM Detectors for AnDY Nilanga Liyanage University of Virginia. Outline GEM chamber concept Large area GEM chamber projects Proposed GEM configuration for AnDY Jlab SuperBigbite GEM module development CERN-RD51 APV25 based Scalable Readout System (SRS)

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GEM Detectors for AnDY Nilanga Liyanage University of Virginia

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  1. GEM Detectors forAnDYNilanga LiyanageUniversity of Virginia • Outline • GEM chamber concept • Large area GEM chamber projects • Proposed GEM configuration for AnDY • JlabSuperBigbite GEM module development • CERN-RD51 APV25 based Scalable Readout System (SRS) • UVa GEM construction facilities • UVa GEM construction program

  2. GEM working principle GEM foil: 50 mm Kapton + few mm copper on both sides with 70 mm holes, 140 mm pitch Ionization Multiplication (x20) Multiplication (x20) Multiplication (x20) Readout Strong electrostatic field in the GEM holes Recent technology: F. Sauli, Nucl. Instrum. Methods A386(1997)531

  3. COMPASS GEM Tracker • A tracker of twenty two 31 cm x 31 cm GEM chambers successfully operated for years • Rates as high as 2.5 MHz/cm2 COMPASS readout plane (31x31 cm2) 70 mm resolution achieved by strips centroid  Analog readout required (used the APV25 chip)

  4. Large GEM chamberprojects • STAR Forward GEM Tracker • 6 triple-GEM disks around beam • IR~10.5 cm, OR~39 cm • APV25 electronics Large prototype GEM module for CMS: 99 cm x (22 – 45.5) cm TOTEM T1 prototypemade with single mask GEM foils (33 cm x 66 cm) The 40 x 50 cm2 GEM is very standard and conservative technology

  5. Jefferson Lab SBSTrackers – Front Tracker Front Tracker Geometry 18 modules In Italy x6 • 50 cm x 40 cm Modules are assembled to form • larger chambers with different sizes • Front tracker: Six 40 cm x 150 cm GEM layers • INFN Funding: to be built in Italy • Polarimeter trackers: Eight 50 cm x 200 cm GEM layers • to be built in Virginia 76 modules In Virginia

  6. Basic Module of SBS Trackers Basic module developed in Rome used for all trackers Features: size: 40x50 cm2 active area thin frame: only 8 mm wide single mask tech. GEM foils 2D strip readout (a la COMPASS) - 0.4 mm pitch X= 0.54%X0 Support frame Spacer cover drift 3 xGEM Honeycomb with readout

  7. AnDY GEM configuration • TRK-1 • TRK-2 • TRK-3

  8. RD-51 Scalable Readout System • Lowcost APV25-S1 based system developed by the CERN-based RD51 coll. • Cost ~ $ 3/chan • RD-51 electronics group has agreed to deliver up to 40 k chan. By the end of 2012. • UVa research scientist Kondo Gnanvo is an SRS expert; assembled and operated first large SRS system (15 k chan.)

  9. Cosmic Data from UVa test setup • Small SRS system @ UVa with 2048 ch • Reading 4 10 x 10 cm2 GEM chambers with X/Y readout • Standalone system, triggered by externally provided trigger • Highly reliable, low noise • Now going into Jlab hall A for a beam test. • Currently running with a standalone ALICE DAQ (DATE) and Monitoring (AMORE) software. ~3mm FWHM ~ 1 mm

  10. Assembly and testestingof SBS GEM modules New 40 cm x 50 cm GEM stretcher at Uva Stretching time ~ 1–2hours Foil Tension: T ~ 0.5 kg/cm Fully equipped prototype 40x50 cm2 GEM module for a beam test at DESY

  11. GEM construction facilities at UVa • A 3.5 m x 3 mlevel-100 clean-room: this clean room was used to build • Drift chambers for Bigbite: 2 m x 0.5 m MWDCs. • Prototype GEM tracker with five 10 cm x 10 cm chambers • Another clean room to be added early next year. • APV25 based readout systems with 5000 channels for testing GEMs • Wiener MPOD High Voltage system with 16 sensitive HV channels • CODA based DAQ system • Dry N2 storage cabinets • Dry N2 HV box • GEM foil stretcher

  12. Expertise and manpower for AnDYGEM chambers • Liyanage and Nelyubin (Senior research scientist) • Built the BB MWDC together • Built the prototype GEM tracker • Kondo Gnanvo (Research Scientist): • Recognized GEM and APV electronics expert • Former CERN fellow working on GEM chambers with LeszekRopelewski • Constructed ten 30 cm x 30 cm GEM chambers at FIT • Three senior graduate students • Students already experienced in GEM with prototype chambers. • Oleg Eyser at BNL will work with the UVa team to install and commission the GEM module in the AnDY setup 12

  13. UVa GEM DevelopmentActivity • Ongoing (Pre R&D) • All facilities ready and manpower in-place for final SBS GEM production • Construction, testing, characterization of two 40 x 50 cm2 modules currently underway: expect to complete by mid-April • By Feb. 2017 • Construct, instrument and test 64 GEM modules for SBS. PlansforAnDYGEMs • 6months from funding commitment • Construct, test and deliver 6 GEM modules for TRK-1 • 9months from funding commitment • Construct, test and deliver 6 GEM modules for TRK-2 • 15 months from funding commitment • Construct, test and deliver 12 GEM modules for TRK-2

  14. Meeting the KPPs • # 6: GEM single versus double cluster identification: already demonstrated to be better than 2 mm with prototype tests. • # 7: GEM position resolution: already shown to be better than 100 mm with prototype tests. Resolution for each module will be measured in lab with cosmics before delivery to BNL. • # 8: GEM efficiency. Previously been shown to be higher than 90% for standard GEM chambers. Efficiency for each module will be measured in lab with cosmics before delivery to BNL. 14

  15. Conclusion • GEM modules to be used for AnDY already developed, prototyped and tested for for SBS; ready for production now. • GEM production Infra-structure and expertise in place at UVa; window of opportunity to build AnDYGEMs before major SBS production starts. • Use already developed and tested SRS electronics – “off the shelf and low cost” • Benefit from R&D already done to meet the AnDY schedule. 15

  16. Backup Slides

  17. AnDY GEM configuration • Basic GEM module for AnDY very similar to SBS GEM module with small modifications • Readout using the APV25 based Scalable Readout System (SRS): 35 k total channels • 24 k channels for TRK1 & TRK2 (0.4 mm pitch) • 11 k channels for TRK3 ZIF connectors Panasonic connectors SBS readout ( E.Cisbani, INFN Italy) New design (K. Gnanvo. Uva)

  18. RD SRS test setup at UVa • Small SRS system @ UVa with 2048 ch • Reading 4 10 x 10 cm2 GEM chambers with X/Y readout • Standalone system, triggered by externally provided trigger • Highly reliable, low noise • Now going into Jlab hall A for a beam test. • Currently running with a standalone ALICE DAQ (DATE) and Monitoring (AMORE) software. • Integration of the SRS into Jlab CODA under development GEM1 Y-strips GEM1 X-strips GEM2 X-strips GEM2 Y-strips

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