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We report on the recent development of a 32-channel low-noise analog front-end ASIC "KW03" for hard X-ray and gamma-ray detectors. The ASIC aims for the readout of strip or pixel (pad) detectors utilizing silicon and cadmium telluride (CdTe) as detector materials. Each readout channel includes a charge-sensitive amplifier, bandpass filters and a sample-and-hold circuit. It also includes...
We have developed a prototype cadmium telluride (CdTe) pixel detector for future use in focusing hard X-ray telescopes. We adopted a hybrid configuration where each CdTe sensor pixel is vertically connected to a corresponding pixel cell fabricated in a readout ASIC. This configuration is suitable for detectors with high pixel density to reduce a stray capacitance between readout signal lines. The...
Si single-electron (or single-hole) tunneling PETs containing a network of screw dislocations, which is intentionally formed as a periodic potential source, has been studied focusing on effects of thickness difference of the facing Si layers, i.e., upper and lower top Si layers. As a result, we have found that moderately balanced thicknesses between the layers provide significantly prominent single-electron...
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