Activation of the ASTRO-E hard X-ray detector in low earth orbit

M. Kokubun; Y. Fukazawa; E. Idesawa; J. Kataoka; T. Kamae; K. Matsuzaki; T. Mizuno; Y. Saito; T. Takahashi; K. Takizawa; M. Tashiro; T. Tamura; A. Yoshida

doi:10.1109/23.775546

Activation of the ASTRO-E hard X-ray detector in low earth orbit

M. Kokubun^*, Y. Fukazawa, E. Idesawa, J. Kataoka, T. Kamae, K. Matsuzaki, T. Mizuno, Y. Saito, T. Takahashi, K. Takizawa, M. Tashiro, T. Tamura, A. Yoshida

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

ASTRO-E Hard X-ray Detector (HXD) is characterized by well-type phoswich counters[1] in a compound-eye configuration which reduce the detector background to lower level than any other past hard X-ray mission. When operating in Low Earth Orbit, the expected background of the HXD is an order of 10 ^-5 counts/s/kcV/cm ², mainly caused from the radioactivity induced within the detector materials by geomagnetically trapped protons. Results are presented from measurements of induced radioactivity in two phoswich scintillators, GSO (Gd ₂SiO ₅:Ce 0.5% mol) and BGO (Bi ₄Ge ₃O ₁₂), irradiated by mono-energetic protons at an accelerator facility. Radiation transport computer codes are used to build the detector response functions for emissions from decays of spallation products. Based on the comparison between experimental and simulation results, the activation background level of HXD in the orbit is estimated.

Original language	English
Pages (from-to)	371-376
Number of pages	6
Journal	IEEE Transactions on Nuclear Science
Volume	46
Issue number	3 PART 1
DOIs	https://doi.org/10.1109/23.775546
Publication status	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Nuclear Energy and Engineering
Electrical and Electronic Engineering

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@article{ebca3b1a6e904077b5ec82be27170d90,

title = "Activation of the ASTRO-E hard X-ray detector in low earth orbit",

abstract = "ASTRO-E Hard X-ray Detector (HXD) is characterized by well-type phoswich counters[1] in a compound-eye configuration which reduce the detector background to lower level than any other past hard X-ray mission. When operating in Low Earth Orbit, the expected background of the HXD is an order of 10 -5 counts/s/kcV/cm 2, mainly caused from the radioactivity induced within the detector materials by geomagnetically trapped protons. Results are presented from measurements of induced radioactivity in two phoswich scintillators, GSO (Gd 2SiO 5:Ce 0.5% mol) and BGO (Bi 4Ge 3O 12), irradiated by mono-energetic protons at an accelerator facility. Radiation transport computer codes are used to build the detector response functions for emissions from decays of spallation products. Based on the comparison between experimental and simulation results, the activation background level of HXD in the orbit is estimated.",

author = "M. Kokubun and Y. Fukazawa and E. Idesawa and J. Kataoka and T. Kamae and K. Matsuzaki and T. Mizuno and Y. Saito and T. Takahashi and K. Takizawa and M. Tashiro and T. Tamura and A. Yoshida",

note = "Funding Information: This research was partially supported by the Grand-in-Aid for COE Research No. 07CE2002 by the Ministry of Education, Culture and Science, Japan.",

year = "1999",

doi = "10.1109/23.775546",

language = "English",

volume = "46",

pages = "371--376",

journal = "IEEE Transactions on Nuclear Science",

issn = "0018-9499",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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TY - JOUR

T1 - Activation of the ASTRO-E hard X-ray detector in low earth orbit

AU - Kokubun, M.

AU - Fukazawa, Y.

AU - Idesawa, E.

AU - Kataoka, J.

AU - Kamae, T.

AU - Matsuzaki, K.

AU - Mizuno, T.

AU - Saito, Y.

AU - Takahashi, T.

AU - Takizawa, K.

AU - Tashiro, M.

AU - Tamura, T.

AU - Yoshida, A.

N1 - Funding Information: This research was partially supported by the Grand-in-Aid for COE Research No. 07CE2002 by the Ministry of Education, Culture and Science, Japan.

PY - 1999

Y1 - 1999

N2 - ASTRO-E Hard X-ray Detector (HXD) is characterized by well-type phoswich counters[1] in a compound-eye configuration which reduce the detector background to lower level than any other past hard X-ray mission. When operating in Low Earth Orbit, the expected background of the HXD is an order of 10 -5 counts/s/kcV/cm 2, mainly caused from the radioactivity induced within the detector materials by geomagnetically trapped protons. Results are presented from measurements of induced radioactivity in two phoswich scintillators, GSO (Gd 2SiO 5:Ce 0.5% mol) and BGO (Bi 4Ge 3O 12), irradiated by mono-energetic protons at an accelerator facility. Radiation transport computer codes are used to build the detector response functions for emissions from decays of spallation products. Based on the comparison between experimental and simulation results, the activation background level of HXD in the orbit is estimated.

AB - ASTRO-E Hard X-ray Detector (HXD) is characterized by well-type phoswich counters[1] in a compound-eye configuration which reduce the detector background to lower level than any other past hard X-ray mission. When operating in Low Earth Orbit, the expected background of the HXD is an order of 10 -5 counts/s/kcV/cm 2, mainly caused from the radioactivity induced within the detector materials by geomagnetically trapped protons. Results are presented from measurements of induced radioactivity in two phoswich scintillators, GSO (Gd 2SiO 5:Ce 0.5% mol) and BGO (Bi 4Ge 3O 12), irradiated by mono-energetic protons at an accelerator facility. Radiation transport computer codes are used to build the detector response functions for emissions from decays of spallation products. Based on the comparison between experimental and simulation results, the activation background level of HXD in the orbit is estimated.

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Activation of the ASTRO-E hard X-ray detector in low earth orbit

Abstract

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