Performance evaluation of pnCCD for HiZ-GUNDAM mission

Junko S. Hiraga; Masataka Sato; Daisuke Hatanaka; Aoi Sugimoto; Kenjiro Fujimoto; Makoto Arimoto; Daisuke Yonetoku; Hsien-chieh Shen; Naoki Ogino; Takanori Sakamoto; Petra Majewski; Martin Huth

doi:10.1117/12.3018486

21 August 2024 Performance evaluation of pnCCD for HiZ-GUNDAM mission

Junko S. Hiraga, Masataka Sato, Daisuke Hatanaka, Aoi Sugimoto, Kenjiro Fujimoto, Makoto Arimoto, Daisuke Yonetoku, Hsien-chieh Shen, Naoki Ogino, Takanori Sakamoto, Petra Majewski, Martin Huth

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 130936E (2024) https://doi.org/10.1117/12.3018486
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We are developing a wide-field X-ray monitor onboard the HiZ-GUNDAM mission. HiZ-GUNDAM is a future satellite mission for gamma-ray burst observation to lead the time domain astronomy and multi-messenger astronomy. The pnCCD detectors will be used as a focal plane detector, which is a back-illuminated CCD and fully depleted by reverse-biased pn-junctions on front and back sides. It has a high sensitivity to low-energy X-rays and achieves a high frame rate with column-parallel readout. It was originally developed for X-ray astronomy, and its high radiation hardness has been verified on satellites such as the XMM-Newton and the eRosita mission. The detector temperature is assumed to be around −20 °C, which is higher than that of usual space use CCD sensors, due to thermal design constraints.

We investigated the spectral performance of pnCCDs using a small-sized device mounted on the camera system manufactured by PNDetector GmbH. Several fluorescence X-ray lines from 0.28 keV(C-Kα) to 4.5keV (Ti-Kα) were used for measurements. The energy resolution of 52 eV for 0.28 keV was verified, with a frame rate of 100 Hz at −20 °C of operating temperature. We also made measurements of dark current for various temperatures ranging from −20 to 0 °C and evaluated that the lower discriminated energy could be 123 eV even at 0 °C. These results verified to satisfy the mission requirements of HiZ-GUNDAM.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Junko S. Hiraga, Masataka Sato, Daisuke Hatanaka, Aoi Sugimoto, Kenjiro Fujimoto, Makoto Arimoto, Daisuke Yonetoku, Hsien-chieh Shen, Naoki Ogino, Takanori Sakamoto, Petra Majewski, and Martin Huth "Performance evaluation of pnCCD for HiZ-GUNDAM mission", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130936E (21 August 2024); https://doi.org/10.1117/12.3018486

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