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

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

Research output: Contribution to journalArticle

25 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 languageEnglish
Pages (from-to)371-376
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume46
Issue number3 PART 1
DOIs
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

low Earth orbits
Orbits
Earth (planet)
Chemical activation
activation
Detectors
X rays
detectors
x rays
Radioactivity
radioactivity
Protons
radiation transport
protons
spallation
Phosphors
scintillation counters
Particle accelerators
counters
accelerators

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

Cite this

Kokubun, M., Fukazawa, Y., Idesawa, E., Kataoka, J., Kamae, T., Matsuzaki, K., ... Yoshida, A. (1999). Activation of the ASTRO-E hard X-ray detector in low earth orbit. IEEE Transactions on Nuclear Science, 46(3 PART 1), 371-376. https://doi.org/10.1109/23.775546

Activation of the ASTRO-E hard X-ray detector in low earth orbit. / Kokubun, M.; Fukazawa, Y.; Idesawa, E.; Kataoka, Jun; Kamae, T.; Matsuzaki, K.; Mizuno, T.; Saito, Y.; Takahashi, T.; Takizawa, K.; Tashiro, M.; Tamura, T.; Yoshida, A.

In: IEEE Transactions on Nuclear Science, Vol. 46, No. 3 PART 1, 1999, p. 371-376.

Research output: Contribution to journalArticle

Kokubun, M, Fukazawa, Y, Idesawa, E, Kataoka, J, Kamae, T, Matsuzaki, K, Mizuno, T, Saito, Y, Takahashi, T, Takizawa, K, Tashiro, M, Tamura, T & Yoshida, A 1999, 'Activation of the ASTRO-E hard X-ray detector in low earth orbit', IEEE Transactions on Nuclear Science, vol. 46, no. 3 PART 1, pp. 371-376. https://doi.org/10.1109/23.775546
Kokubun, M. ; Fukazawa, Y. ; Idesawa, E. ; Kataoka, Jun ; Kamae, T. ; Matsuzaki, K. ; Mizuno, T. ; Saito, Y. ; Takahashi, T. ; Takizawa, K. ; Tashiro, M. ; Tamura, T. ; Yoshida, A. / Activation of the ASTRO-E hard X-ray detector in low earth orbit. In: IEEE Transactions on Nuclear Science. 1999 ; Vol. 46, No. 3 PART 1. pp. 371-376.
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