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Tadayuki Takahashi, Keiichi Abe, Manabu Endo, Yasuhiko Endo, Yuuichiro Ezoe, Yasushi Fukazawa, Masahito Hamaya, Shinya Hirakuri, Soojing Hong, Michihiro Horii, Hokuto Inoue, Naoki Isobe, Takeshi Itoh, Naoko Iyomoto, Tuneyoshi Kamae, Daisuke Kasama, Jun Kataoka, Hiroshi Kato, Madoka Kawaharada, Naomi Kawano, Kengo Kawashima, Satoshi Kawasoe, Tetsuichi Kishishita, Takao Kitaguchi, Yoshihito Kobayashi, Motohide Kokubun, Jun’ichi Kotoku, Manabu Kouda, Aya Kubota, Yoshikatsu Kuroda, Greg Madejski, Kazuo Makishima, Kazunori Masukawa, Yukari Matsumoto, Takefumi Mitani, Ryohei Miyawaki, Tsunefumi Mizuno, Kunishiro Mori, Masanori Mori, Mio Murashima, Toshio Murakami, Kazuhiro Nakazawa, Hisako Niko, Masaharu Nomachi, Yuu Okada, Masanori Ohno, Kousuke Oonuki, Naomi Ota, Hideki Ozawa, Goro Sato, Shingo Shinoda, Masahiko Sugiho, Masaya Suzuki, Koji Taguchi, Hiromitsu Takahashi, Isao Takahashi, Shin’ichiro Takeda, Ken-ichi Tamura, Takayuki Tamura, Takaaki Tanaka, Chiharu Tanihata, Makoto Tashiro, Yukikatsu Terada, Shin’ya Tominaga, Yasunobu Uchiyama, Shin Watanabe, Kazutaka Yamaoka, Takayuki Yanagida, Daisuke Yonetoku, Hard X-Ray Detector (HXD) on Board Suzaku, Publications of the Astronomical Society of Japan, Volume 59, Issue sp1, 30 January 2007, Pages S35–S51, https://doi.org/10.1093/pasj/59.sp1.S35
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Abstract
The Hard X-ray Detector (HXD) on board Suzaku covers a wide energy range from 10 keV to 600 keV by the combination of silicon PIN diodes and GSO scintillators. The HXD is designed to achieve an extremely low in-orbit background based on a combination of new techniques, including the concept of a well-type active shield counter. With an effective area of |$142 \,\mathrm{cm}^{2}$| at 20 keV and |$273 \,\mathrm{cm}^{2}$| at 150 keV, the background level at sea level reached |$\sim 1 \times 10^{-5} \,\mathrm{cts} \,\mathrm{s}^{-1} \,\mathrm{cm}^{-2} \,\mathrm{keV}^{-1}$| at 30 keV for the PIN diodes, and |$\sim 2 \times 10^{-5} \,\mathrm{cts} \,\mathrm{s}^{-1} \,\mathrm{cm}^{-2} \,\mathrm{keV}^{-1}$| at 100 keV, and |$\sim 7 \times 10^{-6} \,\mathrm{cts} \,\mathrm{s}^{-1} \,\mathrm{cm}^{-2} \,\mathrm{keV}^{-1}$| at 200 keV for the phoswich counter. Tight active shielding of the HXD results in a large array of guard counters surrounding the main detector parts. These anti-coincidence counters, made of |$\sim 4 \,\mathrm{cm}$| thick BGO crystals, have a large effective area for sub-MeV to MeV |$\gamma$|-rays. They work as an excellent |$\gamma$|-ray burst monitor with limited angular resolution (|$\sim 5^{\circ}$|). The on-board signal-processing system and the data transmitted to the ground are also described.
