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和文: 
英文:An active gain-control system for Avalanche photo-diodes under moderate temperature variations 
著者
和文: Kataoka, J., Sato, R., Ikagawa, T., Kotoku, J., Kuramoto, Y., Tsubuku, Y., Saito, T., Yatsu, Y., 河合 誠之, Ishikawa, Y., Kawabata, N. ..  
英文: Kataoka, J., Sato, R., Ikagawa, T., Kotoku, J., Kuramoto, Y., Tsubuku, Y., Saito, T., Yatsu, Y., Kawai, N., Ishikawa, Y., Kawabata, N. ..  
言語 English 
掲載誌/書名
和文: 
英文:Nuclear Instruments and Methods in Physics Research A 
巻, 号, ページ Vol. 564        pp. 300-307
出版年月 2006年8月 
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DOI https://doi.org/10.1016/j.nima.2006.03.033
アブストラクト Avalanche photodiodes (APDs) are a promising light sensor for various fields of experimental physics. It has been argued, however, that variation of APD gain with temperature could be a serious problem preventing APDs from replacing traditional photomultiplier tubes (PMTs) in some applications. Here we develop an active gain-control system to keep the APD gain stable under moderate temperature variations. As a performance demonstration of the proposed system, we have tested the response of a scintillation photon detector consisting of a 5×5mm reverse-type APD optically coupled with a CsI(Tl) crystal. We show that the APD gain was successfully controlled under a temperature variation of ΔT=20C, within a time-cycle of 6000 s. The best FWHM energy resolution of 6.1±0.2% was obtained for 662 keV γ-rays, and the energy threshold was as low as 6.5 keV, by integrating data from +20C 0C cycles. The corresponding values for -20C 0C cycles were 6.9±0.2% and 5.2 keV, respectively. These results are comparable, or only slightly worse than that obtained at a fixed temperature. Our results suggest new potential uses for APDs in various space researches and nuclear physics. As examples, we briefly introduce the NeXT and Cute-1.7 satellite missions that will carry the APDs as scientific instruments for the first time.

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