12-20 July 2017
BEXCO
Asia/Seoul timezone
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Contribution

BEXCO - Room F(201/202/203/204)

[DM032] Readout Electronics of DAMPE BGO Calorimeter and the Status during the First Year In Orbit

Speakers

  • Changqing FENG

Primary authors

  • Changqing FENG (State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China)

Co-authors

  • Siyuan MA (State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China)
  • Shubin LIU (State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China)
  • Qi AN ()
  • Qi WANG (State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China)

Description

The DAMPE (DArk Matter Particle Explorer) is a scientic satellite which was successfully launched into a 500 Km sun-synchronous orbit, on December 17th, 2015, from the Jiuquan Satellite Launch Center of China. The major scientific objective of DAMPE mission is indirect searching for dark matter by observing high energy primary cosmic rays, especially positrons/electrons and gamma rays with an energy range from 5 GeV to 10 TeV. The BGO (Bismuth Germanate Oxide) calorimeter, which is a critical sub-detector of DAMPE payload, is composed of 308 BGO crystal logs, with the size of 2.5cm*2.5cm*60cm for each log to form a total absorption electromagnetic calorimeter. All the BGO logs are stacked in 14 layers, with each layer consisting of 22 BGO crystal logs and each log is viewed by two PMTs (photomultiplier tubes), from both sides respectively. The main function of readout electronics system, which consists of 16 FEE(Front End Electronics) modules, is to precisely measure the charge of PMT signals and providing “hit” signals. The hit signals are sent to the trigger module of PDPU (Payload Data Process Unit) to generate triggers for the DAMPE. The readout electronics and its behaviors during the first year in orbit are introduced in this paper.