The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector

Caroline A. Kilbourne; Joseph S. Adams; Regis P. Brekosky; James A. Chervenak; Meng P. Chiao; Megan E. Eckart; Enectali Figueroa-Feliciano; Massimiliano Galeazzi; Christoph Grein; Christine A. Jhabvala; Richard L. Kelley; Daniel P. Kelly; Maurice A. Leutenegger; Dan McCammon; F. Scott Porter; Andrew E. Szymkowiak; Tomomi Watanabe; Jun Zhao

doi:10.1117/12.2231415

18 July 2016 The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector

Caroline A. Kilbourne, Joseph S. Adams, Regis P. Brekosky, James A. Chervenak, Meng P. Chiao, Megan E. Eckart, Enectali Figueroa-Feliciano, Massimiliano Galeazzi, Christoph Grein, Christine A. Jhabvala, Richard L. Kelley, Daniel P. Kelly, Maurice A. Leutenegger, Dan McCammon, F. Scott Porter, Andrew E. Szymkowiak, Tomomi Watanabe, Jun Zhao

Author Affiliations +

Proceedings Volume 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray; 99053L (2016) https://doi.org/10.1117/12.2231415
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The calorimeter array of the JAXA Astro-H (renamed Hitomi) Soft X-ray Spectrometer (SXS) was designed to provide unprecedented spectral resolution of spatially extended cosmic x-ray sources and of all cosmic x-ray sources in the Fe-K band around 6 keV, enabling essential plasma diagnostics. The SXS has a square array of 36 microcalorimeters at the focal plane. These calorimeters consist of ion-implanted silicon thermistors and HgTe thermalizing x-ray absorbers. These devices have demonstrated a resolution of better than 4.5 eV at 6 keV when operated at a heat-sink temperature of 50 mK. We will discuss the basic physical parameters of this array, including the array layout, thermal conductance of the link to the heat sink, resistance function, absorber details, and means of attaching the absorber to the thermistorbearing element. We will also present the thermal characterization of the whole array, including thermal conductance and crosstalk measurements and the results of pulsing the frame temperature via alpha particles, heat pulses, and the environmental background. A silicon ionization detector is located behind the calorimeter array and serves to reject events due to cosmic rays. We will briefly describe this anti-coincidence detector and its performance.

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Caroline A. Kilbourne, Joseph S. Adams, Regis P. Brekosky, James A. Chervenak, Meng P. Chiao, Megan E. Eckart, Enectali Figueroa-Feliciano, Massimiliano Galeazzi, Christoph Grein, Christine A. Jhabvala, Richard L. Kelley, Daniel P. Kelly, Maurice A. Leutenegger, Dan McCammon, F. Scott Porter, Andrew E. Szymkowiak, Tomomi Watanabe, and Jun Zhao "The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector", Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99053L (18 July 2016); https://doi.org/10.1117/12.2231415

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