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Long Term Operation and Plans for Tests at GIF

Long Term Operation and Plans for Tests at GIF. CMS GEM Upgrade Workshop III Jeremie MERLIN and Christopher Armaingaud ( University of Strasbourg * ). April 20,2012. * Also at Telecom Physique Strasbourg. Long Term Operation and Plans for Tests at GIF.

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Long Term Operation and Plans for Tests at GIF

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  1. Long TermOperation and Plans for Tests at GIF CMS GEM Upgrade Workshop III Jeremie MERLIN and Christopher Armaingaud (University of Strasbourg*) April 20,2012 * Also at Telecom Physique Strasbourg

  2. Long TermOperation and Plans for Tests at GIF Introduction to the ageingprocess • The ageing process • Polymer formation in the avalanche plasma • Direct deposition of pollutants • Appearance of reactive gas/products in the avalanche process From M. Capeans, Ageing of Gaseous Detectors : assembly materials and procedures, CERN 2/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

  3. Long TermOperation and Plans for Tests at GIF Introduction to the ageingprocess • The aim of the ageing test • Ensure a long term operation in CMS • Understand the effects of the radiation on the materials • If there is ageing, understand its origin and propose solutions 50μm 3/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

  4. Long TermOperation and Plans for Tests at GIF The previousageingmeasurements -double GEM- • Standard operation conditions • Ar/CO2 : 70/30 • Setup • 6 keV X-rays, rate: 4,75.104 Hz/mm2 • Drift: 2kV/cm , Others: 4kV/cm • Gain: 2,2.103 Data from S. Bachmann et al.,Development and test of large size GEM detectors, IEEE Trans. Nucl. Sci. NS-47 (2000) 1412 4/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

  5. Long TermOperation and Plans for Tests at GIF The previousageingmeasurements -triple GEM- • Standard operation conditions • Ar/CO2 : 70/30 • Setup • 8,9 keV X-rays, rate: 103 - 104 Hz/mm2 • Drift: 2,5kV/cm , Others: 3,7kV/cm • Gain: 8,5.103 Data from M. C. Altunbas et al., Aging Measurements with the Gas Electron Multiplier (GEM), CERN-EP/2001-091 5/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

  6. Long TermOperation and Plans for Tests at GIF The ongoingageing test • Standard operation conditions • Ar/CO2/CF4 : 45/15/40 • Setup • 137Cs source, A: 566 GBq • Drift: 3kV/cm , Others: 3,5kV/cm-5kV/cm • Gain: 8.103 - 104 During 6 months in the GIF 6/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

  7. Long TermOperation and Plans for Tests at GIF The ongoingageing test -Gamma Irradiation Facility- GEM lead shield From I. Brunner, Integrated dose around the GIF installation from June to September 2004, CERN-SC-2004-077-RP-SN 7/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

  8. Long TermOperation and Plans for Tests at GIF Meteo Station Power Supply System The ageing test -setup- Gas input HV Pressure Temp° Humidity LEAD SHIELD Mass Chromatography SWPC 5 l/h Gas Output CPU GPIB GND LabView-program SWPC Dual Timer GIF EXPERIMENT OVERVIEW GND Picoammeter VETO C-program GND ADC (965) Discriminator 50x GATE/RATE Preamplifier unipolar Amplifier Readout Connections Multii-Channels Common Gate Input : negative Output Range : 10V Int/Diff : 0.25/0.25 BLR : out GATE Attenuator 8/9 VME Jeremie MERLIN Christopher Armaingaud Linear fan in/fan out April 20,2012

  9. Long TermOperation and Plans for Tests at GIF Thank you 9/9 Jeremie MERLIN Christopher Armaingaud CMS GEM Upgrade Workshop III April 20,2012

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