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A new compact position-sensitive PMT for scintillation detectors

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5 Author(s)
Nagai, S. ; Hamamatsu Photonics KK, Japan ; Watanabe, M. ; Shimoi, H. ; Liu, H.
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A new compact position-sensitive photomultiplier tube (PS-PMT), Hamamatsu R7600-C12, has been developed for scintillation detectors. The PS-PMT has 11 stages of metal channel dynodes [2] and 6(X)+6(Y) crossed plate anodes in a 25.7 mm square×20 mm high metal can package, where the photo-sensitive area is 22 mm square. The performance of the PS-PMT was evaluated in terms of applicability to radiation imaging systems. In comparison with the former type of PS-PMT (Hamamatsu R5900-C8), the new PS-PMT provides smaller light spread and better position response. Also, by removing the flange at the bottom of the PS-PMT, the ratio of the effective area to the outward area is increased. The spatial resolution capability was demonstrated by imaging a stratified LSO array having an element of 1.8 mm×1.8 mm×10 mm. Each crystal element is clearly identified on the image map with 662 keV uniform gamma-ray irradiation. This paper describes the characteristics of the new PS-PMT and the experimental results for a gamma-ray imaging detector

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Nuclear Science, IEEE Transactions on  (Volume:46 ,  Issue: 3 )