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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

ASTRO-E Hard X-ray Detector (HXD) is characterized by well-type phoswich counters in a compound-eye configuration which reduce the X-ray and non X-ray background to lower level than any other past hard X-ray missions. When operating in Low Earth Orbit, the expected background of the HXD is an order of 10-5[counts/s/keV/cm2], mainly caused from the radioactivity induced within the detector materials by nuclear interactions with geomagnetically trapped protons. Results are presented from measurements of induced radioactivity in two phoswich scintillators, GSO and BGO, irradiated by mono-energetic protons at an accelerator facility. Radiation transport computer codes are used to build the detector response functions against emissions from decays of spallation products. Based on the comparison of experimental and simulation results, the activation background level of HXD in the orbit is estimated.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference
PublisherIEEE
Pages227-232
Number of pages6
ISBN (Print)0780350227
Publication statusPublished - 1999 Jan 1
Externally publishedYes
EventProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can
Duration: 1998 Nov 81998 Nov 14

Publication series

NameIEEE Nuclear Science Symposium and Medical Imaging Conference
Volume1

Other

OtherProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record
CityToronto, Que, Can
Period98/11/898/11/14

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

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  • Cite this

    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. In IEEE Nuclear Science Symposium and Medical Imaging Conference (pp. 227-232). (IEEE Nuclear Science Symposium and Medical Imaging Conference; Vol. 1). IEEE.