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Proceedings Paper

Superfine photon-counting detector for 0.1-100-keV x-ray imaging
Author(s): Emi Miyata; Noriaki Tawa; Kenji Mukai; Masami Miki; Gensuke Koizumi
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Paper Abstract

We report on a new photon-counting detector possessing unprecedented spatial resolution, moderate spectral resolution and high background-rejection capability for 0.1 - 100 keV X-rays. It consists of an X-ray charge-coupled device (CCD) and scintillator. The scintillator is directly deposited on the back surface of the X-ray CCD. Low-energy X-rays below 10 keV can be directly detected in the CCD. The majority of hard X-rays above 10 keV pass through the CCD but can be detected in the scintillator, generating visible lights there. Since CCDs have a moderate detection efficiency for visible lights, they can again be absorbed by the CCD. We coupled the needlelike CsI(Tl) on the front surface of the back-illuminated (BI) CCD. High detection efficiency for visible lights of the BI CCD enables to collect the lights emitted from CsI(Tl) efficiently, leading to the moderate spectral resolution of 25% at 59.5 keV. We also investigated the imaging capability of our device and found it to be (10±3)μm at 17.4 keV.

Paper Details

Date Published: 29 September 2004
PDF: 10 pages
Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.549546
Show Author Affiliations
Emi Miyata, Osaka Univ. (Japan)
Noriaki Tawa, Osaka Univ. (Japan)
Kenji Mukai, Osaka Univ. (Japan)
Masami Miki, Osaka Univ. (Japan)
Gensuke Koizumi, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 5501:
High-Energy Detectors in Astronomy
Andrew D. Holland, Editor(s)

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