Hard x-ray imager onboard Hitomi (ASTRO-H)
Hard x-ray imager onboard Hitomi (ASTRO-H)
复制标题
Hitomi (ASTRO-H) 上搭载的硬 X 射线成像仪
DOI:
10.1117/1.jatis.4.2.021410
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
T. Yuasa
中科院分区:
文献类型:
--
作者:
K. Nakazawa;G. Sato;M. Kokubun;T. Enoto;Y. Fukazawa;K. Hagino;Katsuhiro Hayashi;J. Kataoka;J. Katsuta;S. Kobayashi;P. Laurent;F. Lebrun;O. Limousin;D. Maier;K. Makishima;T. Mizuno;K. Mori;T. Nakamori;T. Nakano;H. Noda;H. Odaka;M. Ohno;M. Ohta;S. Saito;R. Sato;H. Tajima;H. Takahashi;Tadayuki Takahashi;S. Takeda;Takaaki Tanaka;Y. Terada;H. Uchiyama;Y. Uchiyama;S. Watanabe;K. Yamaoka;Y. Yatsu;T. Yuasa
Abstract. The hard x-ray imaging spectroscopy system of “Hitomi” x-ray observatory is composed of two sets of hard x-ray imagers (HXI) coupled with hard x-ray telescopes (HXT). With a 12-m focal length, the system provides fine (1 ′ . 7 half-power diameter) imaging spectroscopy covering about 5 to 80 keV. The HXI sensor consists of a camera, which is composed of four layers of Si and one layer of CdTe semiconductor imagers, and an active shield composed of nine Bi4Ge3O12 scintillators to provide low background. The two HXIs started observation on March 8 and 14, 2016 and were operational until 26 March. Using a Crab observation, 5 to 80 keV energy coverage and good detection efficiency were confirmed. The detector background level of 1 to 3 × 10 − 4 counts s − 1 keV − 1 cm − 2 (in detector geometrical area) at 5 to 80 keV was achieved, by cutting the high-background time-intervals, adopting sophisticated energy-dependent imager layer selection, and baffling of the cosmic x-ray background and active-shielding. This level is among the lowest of detectors working in this energy band. By comparing the effective area and the background, it was shown that the HXI had a sensitivity that is same to that of NuSTAR for point sources and 3 to 4 times better for largely extended diffuse sources.
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影响因子:
2.3
作者:
M. Kokubun;K. Makishima;T. Takahashi;T. Murakami;M. Tashiro;Y. Fukazawa;T. Kamae;G. Madejski
通讯作者:
M. Kokubun;K. Makishima;T. Takahashi;T. Murakami;M. Tashiro;Y. Fukazawa;T. Kamae;G. Madejski
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1016/j.nima.2018.02.071
发表时间:
2018
期刊:
Nuclear Inst. and Methods in Physics Research, A
影响因子:
--
作者:
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通讯作者:
... (13番目/50人中)
DOI:
10.1016/j.nima.2016.03.038
发表时间:
2016
期刊:
NIMA
影响因子:
--
作者:
G. Sato;K. Hagino et al.
通讯作者:
K. Hagino et al.
DOI:
--
发表时间:
2007
期刊:
Nuclear instruments & methods in physics research 579
影响因子:
--
作者:
Shin'ichiro Takeda;et. al.
通讯作者:
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