Recent progress of avalanche photodiodes in high-resolution X-rays and γ-rays detection

J. Kataoka*, T. Saito, Y. Kuramoto, T. Ikagawa, Y. Yatsu, J. Kotoku, M. Arimoto, N. Kawai, Y. Ishikawa, N. Kawabata


研究成果: Conference article査読

72 被引用数 (Scopus)


We have studied the performance of large area avalanche photodiodes (APDs) recently developed by Hamamatsu Photonics K.K, in high-resolution X-rays and γ-rays detections. We show that reach-through APD can be an excellent soft X-ray detector operating at room temperature or moderately cooled environment. We obtain the best energy resolution ever achieved with APDs, 6.4% for 5.9 keV X-rays, and obtain the energy threshold as low as 0.5 keV measured at -20°C. Thanks to its fast timing response, signal carriers in the APD device are collected within a short time interval of 1.9 ns (FWHM). This type of APDs can therefore be used as a low-energy, high-counting particle monitor onboard the forthcoming Pico-satellite Cute1.7. As a scintillation photon detector, reverse-type APDs have a good advantage of reducing the dark noise significantly. The best FWHM energy resolutions of 9.4±0.3% and 4.9±0.2% were obtained for 59.5 and 662 keV γ-rays, respectively, as measured with a CsI(Tl) crystal. Combination of APDs with various other scintillators (BGO, GSO, and YAP) also showed better results than that obtained with a photomultiplier tube (PMT). These results suggest that APD could be a promising device for replacing traditional PMT usage in some applications. In particular 2-dim APD array, which we present in this paper, will be a promising device for a wide-band X-ray and γ-ray imaging detector in future space research and nuclear medicine.

ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
出版ステータスPublished - 2005 4月 1
イベントDevelopment and Application of semiconductor Tracking Detectors -
継続期間: 2004 6月 142004 6月 17

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学


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