Abstract:
We present the characteristics and performance of an application specific integrated circuit (ASIC) designed to read out high-purity germanium (HPGe) strip detectors. The...Show MoreMetadata
Abstract:
We present the characteristics and performance of an application specific integrated circuit (ASIC) designed to read out high-purity germanium (HPGe) strip detectors. The ASIC has 32 channels, each of which contains two shaping circuits to allow for high-resolution measurements of both energy and timing; from the timing measurements, the depth of interaction in a detector can be determined. The ASIC will be used as the front- end readout for the HPGe double-sided strip detectors flown aboard the Compton Spectrometer and Imager (COSI) NASA Small Explorer mission, and much of the ASIC development has been funded by the COSI project and by NASA APRA. While the ASIC was designed for HPGe strip detectors, it has also been used to read out silicon strip detectors, CZT detectors, and even silicon photomultipliers optically coupled to scintillators. We evaluated the ASIC on the bench with 30 pF input capacitance to simulate a detector and with a HPGe double-sided strip detector. Here we describe the initial results of these experiments. In particular, we present a measured full width at half maximum of 2.2 keV at 59.5 keV on a HPGe detector similar to the COSI detectors, showing that we are able to maintain the energy resolution required for the COSI mission using the ASIC as the front-end readout.
Date of Conference: 04-11 November 2023
Date Added to IEEE Xplore: 13 December 2023
ISBN Information: