Superfine photon-counting detector for 0.1-100 keV X-ray imaging

Emi Miyata; Noriaki Tawa; Kenji Mukai; Masami Miki; Gensuke Koizumi

doi:10.1117/12.549546

29 September 2004 Superfine photon-counting detector for 0.1-100-keV x-ray imaging

Emi Miyata, Noriaki Tawa, Kenji Mukai, Masami Miki, Gensuke Koizumi

Proceedings Volume 5501, High-Energy Detectors in Astronomy; (2004) https://doi.org/10.1117/12.549546
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

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.

Citation Download Citation

Emi Miyata, Noriaki Tawa, Kenji Mukai, Masami Miki, and Gensuke Koizumi "Superfine photon-counting detector for 0.1-100-keV x-ray imaging", Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); https://doi.org/10.1117/12.549546

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