CALET Instruments

CALET carries 2 types of instruments, the Calorimeter (CAL) and Gamma-Ray Burst Monitor (CGBM).

The CAL consists of three stacked detectors: the charge detector (CHD), the imaging calorimeter (IMC), and the total absorption calorimeter (TASC). By combining the particle shower trajectory data obtained from each detector, the characteristics of incoming cosmic rays, such as type of particle, arrival direction, etc. are acquired.

The CGBM (Yamaoka et al. 2013) is composed of three detectors: two Hard X-ray Monitors (HXM) devices and one Soft Gamma-ray Monitor (SGM) device, all of which utilize a photomultiplier tube and a scintillator. Two types of crystals are used as scintillators: lanthanum bromide (LaBr3) for the HXM and bismuth germanate (BGO) for the SGM. The entire CGBM array is capable of measuring X-ray and gamma-ray wavelengths over a wide range from 7 kilo-electron volts up to 20 mega-electron volts.

Last Modified: 13 August 2020