18 July 2016 In-flight performance of pulse processing system of the ASTRO-H soft x-ray spectrometer
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Abstract
We summarize results of the initial in-orbit performance of the pulse shape processor (PSP) of the soft x-ray spectrometer instrument onboard ASTRO-H (Hitomi). Event formats, kind of telemetry, and the pulse processing parameters are described, and the parameter settings in orbit are listed. PSP was powered-on two days after launch, and the event threshold was lowered in orbit. PSP worked fine in orbit, and there were no memory error nor SpaceWire communication error until the break-up of spacecraft. Time assignment, electrical crosstalk, and the event screening criteria are studied. It is confirmed that the event processing rate at 100% CPU load is ~200 c/s/array, compliant with the requirement on PSP.
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Yoshitaka Ishisaki, Shinya Yamada, Hiromi Seta, Makoto S. Tashiro, Sawako Takeda, Yukikatsu Terada, Yuka Kato, Masahiro Tsujimoto, Shu Koyama, Kazuhisa MItsuda, Makoto Sawada, Kevin R. Boyce, Meng P. Chiao, Tomomi Watanabe, Maurice A. Leutenegger, Megan E. Eckart, F. Scott Porter, Caroline A. Kilbourne, Richard L. Kelley, "In-flight performance of pulse processing system of the ASTRO-H soft x-ray spectrometer", Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99053T (18 July 2016); doi: 10.1117/12.2234222; https://doi.org/10.1117/12.2234222
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