Development and verification of signal processing system of BGO active shield onboard Astro-H

Masanori Ohno; Shin'ya Tokuda; Takafumi Kawano; Shunya Furui; Ikumi Edahiro; Hiromitsu Takahashi; Kunihiro Goto; Yasushi Fukazawa; Hiroaki Murakami; Syogo Kobayashi; Soki Sakurai; Makoto Sasano; Shunsuke Torii; Toshio Nakano; Ko Ono; Katsuma Miyake; Terukazu Nishida; Kazuhiro Nakazawa; Kazuo Makishima; Kouichi Hagino; Takayuki Yuasa; Hirokazu Odaka; Rie Sato; Shin Watanabe; Motohide Kokubun; Tadayuki Takahashi; Goro Sato; Jun Kataoka; Tatsuhiko Saito; Kazutaka Yamaoka; Hiroyasu Tajima; Yoichi Yatsu; Takeshi Nakamori; Hideki Uchiyama; Daisuke Yonetoku

doi:10.1117/12.2055676

25 July 2014 Development and verification of signal processing system of BGO active shield onboard Astro-H

Masanori Ohno, Shin'ya Tokuda, Takafumi Kawano, Shunya Furui, Ikumi Edahiro, Hiromitsu Takahashi, Kunihiro Goto, Yasushi Fukazawa, Hiroaki Murakami, Syogo Kobayashi, Soki Sakurai, Makoto Sasano, Shunsuke Torii, Toshio Nakano, Ko Ono, Katsuma Miyake, Terukazu Nishida, Kazuhiro Nakazawa, Kazuo Makishima, Kouichi Hagino, Takayuki Yuasa, Hirokazu Odaka, Rie Sato, Shin Watanabe, Motohide Kokubun, Tadayuki Takahashi, Goro Sato, Jun Kataoka, Tatsuhiko Saito, Kazutaka Yamaoka, Hiroyasu Tajima, Yoichi Yatsu, Takeshi Nakamori, Hideki Uchiyama, Daisuke Yonetoku

Author Affiliations +

Proceedings Volume 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray; 91445G (2014) https://doi.org/10.1117/12.2055676
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The hard X-ray imager (HXI) and soft gamma-ray detector (SGD) onboard Astro-H observe astronomical objects with high sensitivity in the hard X-ray (5−80 keV) and soft gamma-ray (40−600 keV) energy bands. To achieve this high sensitivity, background rejection is essential, and these detectors are surrounded by large and thick bismuth germinate scintillators as an active shield. We have developed adequate trigger logic for both the HXI and SGD to process signals from main detector and BGO shield simultaneously and then we optimized the trigger delay and width, with consideration of the trigger latch efficiency. The shield detector system performs well, even after it is assembled as the HXI sensor. The energy threshold maintains the same level as that observed during the prototype development phase, and the experimental room background level of the main detector is successfully reduced by our optimized trigger timing.

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Masanori Ohno, Shin'ya Tokuda, Takafumi Kawano, Shunya Furui, Ikumi Edahiro, Hiromitsu Takahashi, Kunihiro Goto, Yasushi Fukazawa, Hiroaki Murakami, Syogo Kobayashi, Soki Sakurai, Makoto Sasano, Shunsuke Torii, Toshio Nakano, Ko Ono, Katsuma Miyake, Terukazu Nishida, Kazuhiro Nakazawa, Kazuo Makishima, Kouichi Hagino, Takayuki Yuasa, Hirokazu Odaka, Rie Sato, Shin Watanabe, Motohide Kokubun, Tadayuki Takahashi, Goro Sato, Jun Kataoka, Tatsuhiko Saito, Kazutaka Yamaoka, Hiroyasu Tajima, Yoichi Yatsu, Takeshi Nakamori, Hideki Uchiyama, and Daisuke Yonetoku "Development and verification of signal processing system of BGO active shield onboard Astro-H", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91445G (25 July 2014); https://doi.org/10.1117/12.2055676

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