The DAMPE (DArk Matter Particle Explorer) is a scientific satellite beingdeveloped in China, aimed at cosmic ray study, gamma ray astronomy, andsearching for the clue of dark matter particles, with a planned mission periodof more than 3 years and an orbit altitude of about 500 km. The BGOCalorimeter, which consists of 308 BGO (Bismuth Germanate Oxid) crystal bars,616 PMTs (photomultiplier tubes) and 1848 dynode signals, has approximately 32radiation lengths. It is a crucial sub-detector of the DAMPE payload, with thefunctions of precisely measuring the energy of cosmic particles from 5 GeV to10TeV, distinguishing positrons/electrons and gamma rays from hadronbackground, and providing trigger information for the whole DAMPE payload. Thedynamic range for a single BGO crystal is about 2?105 and there are 1848detector signals in total. To build such an instrument in space, the majordesign challenges for the readout electronics come from the large dynamicrange, the high integrity inside the very compact structure, the strict powersupply budget and the long term reliability to survive the hush environmentduring launch and in orbit. Currently the DAMPE mission is in the end of QM(Qualification Model) stage. This paper presents a detailed description of thereadout electronics for the BGO calorimeter.
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