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SUMMARY:Design and Prototype Testing of the Homogeneous Crystal Calorimete
 r for STCF
DTSTART;VALUE=DATE-TIME:20230905T160000Z
DTEND;VALUE=DATE-TIME:20230905T162000Z
DTSTAMP;VALUE=DATE-TIME:20260614T231714Z
UID:indico-contribution-3323@indico.tlabs.ac.za
DESCRIPTION:Speakers: Yong Song (University of Science and Technology of C
 hina)\nThe Super Tau-Charm Facility (STCF) is the next generation high lum
 inosity $e^{+}e^{-}$ collider focusing on the tau-charm physics. STCF will
  achieve a luminosity of over $0.5\\times10^{35} cm^{-2}s^{-1}$ at 4 GeV\,
  resulting in a high event rate and a high beam background for the detecto
 r system. The background count rate of over 1 MHz per module places new de
 mands on the electromagnetic calorimeter (EMC): maintaining good energy an
 d position resolution under severe pileup conditions. Meanwhile\, the deve
 lopment of event timing and particle identification capability is also an 
 important aspect of calorimeter R&D\, where a time resolution of better th
 an hundreds of picoseconds is expected.\n\nThis talk summarizes the simula
 tion and optimization of the calorimeter system\, the prototype fabricatio
 n and the test results on the prototype are summarized. The STCF EMC is ba
 sed on a fast pure $CsI$ crystal and is read out by avalanche photodiodes 
 (APD). By considering the effect of crystal and electronics response\, as 
 well as the pileup condition\, a complete chain of simulation and reconstr
 uction is implemented in the Offline Software of Super Tau-Charm Facility 
 (OSCAR). The architecture and module geometry of EMC are designed by optim
 izing the physical performance under OSCAR. Based on the module design\, a
  novel wavelength shifter (WLS)-enhanced prototype is fabricated\, which f
 eatures fast time response and good signal-to-noise ratio at a reasonable 
 cost. The comprehensive test results on the prototype\, especially on the 
 radiation hardness of the prototype\, the uniformity of the light collecti
 on and the cosmic ray-timing performance of the prototype\, are also prese
 nted.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/3323/
LOCATION: Meeting Room 2.64 - 2.66
URL:https://indico.tlabs.ac.za/event/112/contributions/3323/
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