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SUMMARY:MPGD-based counters of single photons developed for COMPASS RICH-1
DTSTART;VALUE=DATE-TIME:20140228T084500Z
DTEND;VALUE=DATE-TIME:20140228T090500Z
DTSTAMP;VALUE=DATE-TIME:20260310T095502Z
UID:indico-contribution-41@indico.inp.nsk.su
DESCRIPTION:Speakers: Stefano Levorato (Istituto Nazionale di Fisica Nucle
 are)\nIn fundamental research\, gas detectors of single photons are a must
  in the field of Cherenkov imaging techniques (RICH counters) for particle
  identification in large momentum ranges and with wide coverage of the pha
 se space domain.\nThese counters\, already extensively used\, are foreseen
  in the setups of future experiments in a large variety of fields in nucle
 ar and particle physics.\nThe quest of novel gaseous photon detector is  d
 ictated by the fact that the present gaseous photon detectors have unique 
 characteristics concerning operation in magnetic field\, low material budg
 et and cost\,  but they suffers of severe limitations in effective efficie
 ncy\, rates\, life time and stability\, discouraging their use in high pre
 cision and  high rate experiments.\nWe are developing large size THick GEM
  (THGEM)-based detectors of single photons.\nThe R&D program includes the 
 complete characterization of the THGEM electron multipliers\, the study of
  the aspects related to the detection of single photons and the engineerin
 g towards large size detector prototype.\nOur most recent achievements inc
 lude: dedicated studies concerning the ion back-flow to the photo-cathode\
 ; relevant progress in the engineering aspects\, in particular related to 
 the production of large-size THGEMs\, where the strict correlation between
  the local gain-value and the local thickness-value has been demonstrated 
 and a 300 cm × 300 mm² active area detector has been successfully operat
 ed at the CERN PS T10 test beam\; the introduction of a new hybrid detecto
 r architecture offering promising indication\, which is formed by a THGEM 
 layer which acts as CsI support and pre-amplification device followed by a
  MICROMEGAS multiplication stage.\nThe general status of the R&D program a
 nd the recent progress are reported.\n\nhttps://indico.inp.nsk.su/event/0/
 contributions/41/
LOCATION:
URL:https://indico.inp.nsk.su/event/0/contributions/41/
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