Andrew S. Hoover

TL;DR: This paper builds a 256 pixel spectrometer with an average full-width-at-half-maximum energy resolution, a useable dynamic range above 400 keV, and a collecting area of 5 cm(2), and demonstrates multiplexed readout of the full 256 pixel array.

TL;DR: In this article, the physical detector response of the Fermi Gamma-Ray Burst Monitor (GBM) is determined with the help of Monte Carlo simulations, which are supported and verified by on-ground individual detector calibration measurements.

Abstract: The authors present a prototype for a high-energy-resolution, high-count-rate, gamma-ray spectrometer intended for nuclear forensics and international nuclear safeguards. The prototype spectrometer is an array of 14 transition-edge-sensor microcalorimeters with an average energy resolution of 47eV (full width at half maximum) at 103keV. The resolution of the best pixel is 25eV. A cryogenic, time-division multiplexer reads out the array. Several important topics related to microcalorimeter arrays are discussed, including cross-talk, the uniformity of detector bias conditions, fabrication of the arrays, and the multiplexed readout. The measurements and calculations demonstrate that a kilopixel array of high-resolution microcalorimeters is feasible.

TL;DR: In this article, the physical detector response of the Fermi Gamma-Ray Burst Monitor (GBM) is determined with the help of Monte Carlo simulations, which are supported and verified by on-ground individual detector calibration measurements.

TL;DR: The Advanced Compton Telescope (ACT) as mentioned in this paper is the next major step in gamma-ray astronomy, which will probe the fires where chemical elements are formed by enabling high-resolution spectroscopy of nuclear emission from supernova explosions.