We have been developing hard X-ray/soft gamma-ray imaging detectors
for a next generation X-ray satellite mission, NeXT, proposed in Japan.
The Hard X-ray Imager (HXI) onboard NeXT is located at the focal
plane of the Hard X-ray Telescope (HXT) to achieve unprecedented
sensitivities in the 10-80 keV energy band. It consists of multiple
layers of double-sided silicon strip detectors followed by a double-
sided CdTe strip detector.
The Soft Gamma-ray Detector (SGD) onboard NeXT is a Compton camera
consists of 20 layers of silicon pad detectors surrounded by CdTe pad
detectors. Combined with a narrow field of view (0.5-4 deg) active
BGO collimator and Compton kinematics, it achieves one order of
magnitude better sensitivities in the 80-300 keV band.
I will describe the development of silicon and CdTe detectors and low
noise/low power front-end ASICs (Application Specific Integrated
Circuits) commonly used in both instruments.
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