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Compton polarimeter Electron detector upgrade and status

PREX/Happex Collaboration Meeting May 17 th 2007 Alexandre Camsonne. Compton polarimeter Electron detector upgrade and status. Electron detector. 4 planes microstrip 128 strips Located about 5 mm from electron beam

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Compton polarimeter Electron detector upgrade and status

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  1. PREX/Happex Collaboration Meeting May 17th 2007 Alexandre Camsonne Compton polarimeterElectron detector upgrade andstatus Happex Collaboration Meeting

  2. Happex Collaboration Meeting Electron detector • 4 planes microstrip 128 strips • Located about 5 mm from electron beam • Detection of Compton electrons using 3rd dipole of the chicane as analyzer

  3. Happex Collaboration Meeting Upgrade • Mechanical • New vertical motion system and accomodation of the new electronics • Electronics • Switch to 192 microstrips for improved resolution to reduce systematics • DAQ • Analysis

  4. Happex Collaboration Meeting Mechanical design • Design Clermont-Ferrand • Complete • Most parts in procurement • http://clrwww.in2p3.fr/meca/plans/Site-web/Cebaf/TJN-DetE/TJN-DetE-P2.html • Control motion • Motor ordered • Controls/interlocks to be developed

  5. Happex Collaboration Meeting Mechanical design • Integration JLab • CAD drawings from Clermont Ferrand to check for interference • Support stand design complete

  6. Happex Collaboration Meeting Electronics • Detectors strips at Clermont Ferrand • 4 planes 192 strips • Amplifier • Design complete • Being manufactured • Complete testing to be done • Trigger • Work on board routing in process • Design done 1 or 2 months • Test card trigger done for test in July

  7. Happex Collaboration Meeting DAQ • Trigger and readout similar to previous detector • Crl to be adapted • Synchronization/integration with photon detector ( coincidence trigger) Work will start by spring 2008 when everything at JLab ( 2 months )

  8. Happex Collaboration Meeting Analysis • Reuse of Etienne Burtin, Stephanie Escoffie software • Addition of David Lhuillier improvements • Scaling of old software or rewriting of software ?

  9. Happex Collaboration Meeting Man power • Clermont • Bernard Michel ( Electronics ) • Michel Brossard ( Physicist ) • Guy Savinel (?) ( Mechanical) • Jefferson Laboratory • Sue Witherspoon (EPICS Slow control) • Alexandre Camsonne ( DAQ / Analysis) • More people ?

  10. Happex Collaboration Meeting Conclusion • Mechanical design complete • Progress on the electron detector electronics • Final date for installation to be determined • All components ready by end of 2007 ready for installation beginning 2008

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