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Gain Calibration of Large Prototypes

Gain Calibration of Large Prototypes. CMS GEM Upgrade Workshop III Jeremie MERLIN ( University of Strasbourg * ). April 20,2012. * Also at Telecom Physique Strasbourg. Gain Calibration of Large Prototypes. Introduction. Proto I. GE1/1 - Full-size Prototypes : Proto I :

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Gain Calibration of Large Prototypes

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  1. Gain Calibration of Large Prototypes CMS GEM Upgrade Workshop III Jeremie MERLIN (University of Strasbourg*) April 20,2012 * Also at Telecom Physique Strasbourg

  2. Gain Calibration of Large Prototypes Introduction Proto I • GE1/1 - Full-size Prototypes : • Proto I : • - 99x(22-45) cm2 active area • - Single mask technology • - gaps : 3/2/2/2 (mm) • - 8 read-out sectors • - 1024 channels • - Strip pitch: 0.8 – 1.6 (mm) • Proto II : • - 99x(22-45) cm2 active area • - Single mask technology • - gaps : 3/1/2/1 (mm) • - 24 read-out sectors • - 3076 channels • - Strip pitch: 0.6 – 1.2 (mm) Proto II 2/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  3. Gain Calibration of Large Prototypes Calibration Procedure • Count rate measurement • Pulse height spectrum acquisition • Output current measurement • Gain stability • Setup : • Different mixtures : Ar/CO2 - 70/30 • Ar/CO2/CF4 – 45/15/40 • Xray (copper target) : 8 keV – 20 kV – 5 mA • collimator 2mm 3/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  4. Gain Calibration of Large Prototypes Calibration Procedure GE1/1 – prototype I 4/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  5. Gain Calibration of Large Prototypes 5/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  6. Gain Calibration of Large Prototypes Pulse Height Spectrum Acquisition Triple GEM Proto GE1/1-I (3/2/2/2) Ar/CO2 – 70/30 8 keV From Laura Franconi (2011) Bremsstrahlung effect from the Aluminum sheet (covering the chamber) 5 keV 6/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  7. Gain Calibration of Large Prototypes Count Rate Measurement Triple GEM Proto GE1/1-I (3/2/2/2) Ar/CO2 – 70/30 Hz Operating Region HV (V) 7/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  8. Gain Calibration of Large Prototypes 8/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  9. Gain Calibration of Large Prototypes Gain Calibration Triple GEM Proto GE1/1-I (3/2/2/2) Ar/CO2 – 70/30 HV (V) 9/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  10. Gain Calibration of Large Prototypes Calibration Procedure GE1/1 – prototype II 10/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  11. Gain Calibration of Large Prototypes Pulse Height Spectrum Acquisition Triple GEM Proto GE1/1-II (3/1/2/1) Ar/CO2/CF4 – 45/15/40 Counts GE1/1-II 8 keV 5 keV Sectors Bremsstrahlung ADC Chanels 11/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  12. Gain Calibration of Large Prototypes Count Rate Measurement Triple GEM Proto GE1/1-II (3/1/2/1) Ar/CO2/CF4 – 45/15/40 GE1/1-II Rate Hz Operating Region Sectors HV (V) 12/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  13. Gain Calibration of Large Prototypes Gain Calibration GE1/1-II Triple GEM Proto GE1/1-II (3/1/2/1) Ar/CO2/CF4 – 45/15/40 Effective Gain Sectors HV (V) Sectors 13/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  14. Gain Calibration of Large Prototypes Gain Stability GE1/1-II From Laura Franconi (2011) Sectors From Laura Franconi (2011) 14/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  15. Gain Calibration of Large Prototypes Ongoing projects GE1/1 – prototype III From Laura Franconi (2011) • No spacers in active area • Assembly time : 2 hours • No gluing, no soldering • Re-opening possible • GEM exchange possible • No stretch degradation with time • Stretching more intense • Frames less than 10 mm Coming soon … 15/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

  16. Gain Calibration of Large Prototypes Thank you 16/16 CMS GEM Upgrade Workshop III April 20,2012 Jeremie MERLIN

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