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; Kazuma Miyake; Terukazu Nishida; Kazuhiro Nakazawa; Kazuo Makishima; Kouichi Hagino; Takayuki Yuasa; Hirokazu Odaka; Rie Sato; Shin Watanabe; Motohide Kokubun; Goro Sato; Jun Kataoka; Tatsuhiko Saito; Kazutaka Yamaoka; Hiroyasu Tajima; Yoichi Yatsu; Takeshi Nakamori; Hideki Uchiyama; Daisuke Yonetoku

doi:10.1117/12.2055676

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, Kazuma Miyake, Terukazu Nishida, Kazuhiro Nakazawa, Kazuo Makishima, Kouichi HaginoTakayuki Yuasa, Hirokazu Odaka, Rie Sato, Shin Watanabe, Motohide Kokubun, Goro Sato, Jun Kataoka, Tatsuhiko Saito, Kazutaka Yamaoka, Hiroyasu Tajima, Yoichi Yatsu, Takeshi Nakamori, Hideki Uchiyama, Daisuke Yonetoku

School of Advanced Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Citations (Scopus)

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.

Original language	English
Title of host publication	Space Telescopes and Instrumentation 2014
Subtitle of host publication	Ultraviolet to Gamma Ray
Editors	Tadayuki Takahashi, Jan-Willem A. den Herder, Mark Bautz
Publisher	SPIE
ISBN (Electronic)	9780819496126
DOIs	https://doi.org/10.1117/12.2055676
Publication status	Published - 2014 Jan 1
Event	Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray - Montreal, Canada Duration: 2014 Jun 22 → 2014 Jun 26

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9144
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Country	Canada
City	Montreal
Period	14/6/22 → 14/6/26

Keywords

ASTRO-H
FPGA
HXI
SGD
active shield
gamma-ray

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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Ohno, M., Tokuda, SY., Kawano, T., Furui, S., Edahiro, I., Takahashi, H., Goto, K., Fukazawa, Y., Murakami, H., Kobayashi, S., Sakurai, S., Sasano, M., Torii, S., Nakano, T., Ono, K., Miyake, K., Nishida, T., Nakazawa, K., Makishima, K., ... Yonetoku, D. (2014). Development and verification of signal processing system of BGO active shield onboard Astro-H. In T. Takahashi, J-W. A. den Herder, & M. Bautz (Eds.), Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray [91445G] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9144). SPIE. https://doi.org/10.1117/12.2055676

Development and verification of signal processing system of BGO active shield onboard Astro-H. / Ohno, Masanori; Tokuda, Shin'Ya; Kawano, Takafumi; Furui, Shunya; Edahiro, Ikumi; Takahashi, Hiromitsu; Goto, Kunihiro; Fukazawa, Yasushi; Murakami, Hiroaki; Kobayashi, Syogo; Sakurai, Soki; Sasano, Makoto; Torii, Shunsuke; Nakano, Toshio; Ono, Ko; Miyake, Kazuma; Nishida, Terukazu; Nakazawa, Kazuhiro; Makishima, Kazuo; Hagino, Kouichi; Yuasa, Takayuki; Odaka, Hirokazu; Sato, Rie; Watanabe, Shin; Kokubun, Motohide; Sato, Goro; Kataoka, Jun; Saito, Tatsuhiko; Yamaoka, Kazutaka; Tajima, Hiroyasu; Yatsu, Yoichi; Nakamori, Takeshi; Uchiyama, Hideki; Yonetoku, Daisuke.

Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. ed. / Tadayuki Takahashi; Jan-Willem A. den Herder; Mark Bautz. SPIE, 2014. 91445G (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9144).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ohno, M, Tokuda, SY, Kawano, T, Furui, S, Edahiro, I, Takahashi, H, Goto, K, Fukazawa, Y, Murakami, H, Kobayashi, S, Sakurai, S, Sasano, M, Torii, S, Nakano, T, Ono, K, Miyake, K, Nishida, T, Nakazawa, K, Makishima, K, Hagino, K, Yuasa, T, Odaka, H, Sato, R, Watanabe, S, Kokubun, M, Sato, G, Kataoka, J, Saito, T, Yamaoka, K, Tajima, H, Yatsu, Y, Nakamori, T, Uchiyama, H & Yonetoku, D 2014, Development and verification of signal processing system of BGO active shield onboard Astro-H. in T Takahashi, J-WA den Herder & M Bautz (eds), Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray., 91445G, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9144, SPIE, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, Montreal, Canada, 14/6/22. https://doi.org/10.1117/12.2055676

Ohno M, Tokuda SY, Kawano T, Furui S, Edahiro I, Takahashi H et al. Development and verification of signal processing system of BGO active shield onboard Astro-H. In Takahashi T, den Herder J-WA, Bautz M, editors, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. SPIE. 2014. 91445G. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2055676

Ohno, Masanori ; Tokuda, Shin'Ya ; Kawano, Takafumi ; Furui, Shunya ; Edahiro, Ikumi ; Takahashi, Hiromitsu ; Goto, Kunihiro ; Fukazawa, Yasushi ; Murakami, Hiroaki ; Kobayashi, Syogo ; Sakurai, Soki ; Sasano, Makoto ; Torii, Shunsuke ; Nakano, Toshio ; Ono, Ko ; Miyake, Kazuma ; Nishida, Terukazu ; Nakazawa, Kazuhiro ; Makishima, Kazuo ; Hagino, Kouichi ; Yuasa, Takayuki ; Odaka, Hirokazu ; Sato, Rie ; Watanabe, Shin ; Kokubun, Motohide ; Sato, Goro ; Kataoka, Jun ; Saito, Tatsuhiko ; Yamaoka, Kazutaka ; Tajima, Hiroyasu ; Yatsu, Yoichi ; Nakamori, Takeshi ; Uchiyama, Hideki ; Yonetoku, Daisuke. / Development and verification of signal processing system of BGO active shield onboard Astro-H. Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. editor / Tadayuki Takahashi ; Jan-Willem A. den Herder ; Mark Bautz. SPIE, 2014. (Proceedings of SPIE - The International Society for Optical Engineering).

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

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AU - Ohno, Masanori

AU - Tokuda, Shin'Ya

AU - Kawano, Takafumi

AU - Furui, Shunya

AU - Edahiro, Ikumi

AU - Takahashi, Hiromitsu

AU - Goto, Kunihiro

AU - Fukazawa, Yasushi

AU - Murakami, Hiroaki

AU - Kobayashi, Syogo

AU - Sakurai, Soki

AU - Sasano, Makoto

AU - Torii, Shunsuke

AU - Nakano, Toshio

AU - Ono, Ko

AU - Miyake, Kazuma

AU - Nishida, Terukazu

AU - Nakazawa, Kazuhiro

AU - Makishima, Kazuo

AU - Hagino, Kouichi

AU - Yuasa, Takayuki

AU - Odaka, Hirokazu

AU - Sato, Rie

AU - Watanabe, Shin

AU - Kokubun, Motohide

AU - Sato, Goro

AU - Kataoka, Jun

AU - Saito, Tatsuhiko

AU - Yamaoka, Kazutaka

AU - Tajima, Hiroyasu

AU - Yatsu, Yoichi

AU - Nakamori, Takeshi

AU - Uchiyama, Hideki

AU - Yonetoku, Daisuke

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