We present an overview of the ASTRO-H (Hitomi) Soft X-Ray Spectrometer (SXS) and the X-Ray Imaging and Spectrometer Mission (XRISM) {\it Resolve} spectrometer. In each, a 36-pixel X-ray micro-calorimeter array operated at 50 mK covers a 3×3 arc-minute field of view. The instruments are designed to achieve an energy resolution of better than 7 eV over the 0.3 -- 12 keV energy range and operate for more than 3 years in orbit. Actually, the SXS achieved the energy resolution of ∼5 eV in orbit, but it was lost after only a month of operation due to the loss of spacecraft attitude control. For the recovery mission, XRISM will be equipped with the {\it Resolve} spectrometer which has mostly the same design as SXS and is expected to have the same in-flight performance.
@article{arxiv.2303.01642,
title = {Hitomi/XRISM micro-calorimeter},
author = {Kosuke Sato and Yuusuke Uchida and Kumi Ishikawa},
journal= {arXiv preprint arXiv:2303.01642},
year = {2023}
}
Comments
Invited chapter for the edited book {\it High-Resolution X-Ray Spectroscopy: Instrumentation, Data Analysis, and Science} (Eds. C. Bambi and J. Jiang, Springer Singapore, expected in 2023)