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Proceedings Paper

Ground calibration of the spatial response and quantum efficiency of the CdZnTe hard x-ray detectors for NuSTAR
Author(s): Brian W. Grefenstette; Varun Bhalerao; W. Rick Cook; Fiona A. Harrison; Takao Kitaguchi; Kristin K. Madsen; Peter H. Mao; Hiromasa Miyasaka; Vikram Rana
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Paper Abstract

Pixelated Cadmium Zinc Telluride (CdZnTe) detectors are currently flying on the Nuclear Spectroscopic Telescope ARray (NuSTAR) NASA Astrophysics Small Explorer. While the pixel pitch of the detectors is ≈ 605 μm, we can leverage the detector readout architecture to determine the interaction location of an individual photon to much higher spatial accuracy. The sub-pixel spatial location allows us to finely oversample the point spread function of the optics and reduces imaging artifacts due to pixelation. In this paper we demonstrate how the sub-pixel information is obtained, how the detectors were calibrated, and provide ground verification of the quantum efficiency of our Monte Carlo model of the detector response.

Paper Details

Date Published: 29 August 2017
PDF: 9 pages
Proc. SPIE 10392, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX, 1039207 (29 August 2017); doi: 10.1117/12.2271365
Show Author Affiliations
Brian W. Grefenstette, CalTech (United States)
Varun Bhalerao, Indian Institute of Technology Bombay (India)
W. Rick Cook, CalTech (United States)
Fiona A. Harrison, CalTech (United States)
Takao Kitaguchi, RIKEN (Japan)
Kristin K. Madsen, CalTech (United States)
Peter H. Mao, CalTech (United States)
Hiromasa Miyasaka, CalTech (United States)
Vikram Rana, CalTech (United States)

Published in SPIE Proceedings Vol. 10392:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX
Arnold Burger; Ralph B. James; Michael Fiederle; Larry Franks; Stephen A. Payne, Editor(s)

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