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Updated: Mar 11, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
Calibration of the microcalorimeter spectrometer on-board the Hitomi (Astro-H) observatory (invited)
M E Eckart1, K R Boyce2, G V Brown3
1NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA.
Abstract:
The Hitomi Soft X-ray Spectrometer (SXS) was a pioneering non-dispersive imaging x-ray spectrometer with 5 eV FWHM energy resolution, consisting of an array of 36 silicon-thermistor microcalorimeters at the focus of a high-throughput soft x-ray telescope. The instrument enabled astrophysical plasma diagnostics in the 0.3-12 keV band. We introduce the SXS calibration strategy and corresponding ground calibration measurements that took place from 2012-2015, including both the characterization of the microcalorimeter array and measurements of the x-ray transmission of optical blocking filters.
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