Concept information
TERME PRÉFÉRENTIEL
BGO
DÉFINITION
- The Bismuth Germanate (BGO) detectors provide spectral coverage from about 150 keV to 30 MeV. BGO is a high-density material that provides good sensitivity over this difficult energy range. The energy resolution of the 12.7 cm by 12.7 cm cylindrical BGO crystal will be 14% at 661 keV and 4% at 10 MeV and there will be significant efficiency overlapping the lower energy range of the LAT. Each BGO detector is coupled to 2 PMTs on opposite sides, whose outputs are summed, each with its own high-voltage control. This design allows a homogeneous light collection over the detector volume and provides redundancy should one of the PMT?s fail or degrades. The BGO detectors are positioned on opposite sides of the LAT, providing nearly full sky coverage. [Source: NASA]
CONCEPT GÉNÉRIQUE
URI
https://gcmd.earthdata.nasa.gov/kms/concept/d768b855-c464-4112-8c65-4edfa7ebbfeb
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