Improvement of light coupling in BGO detector module by optimization of the crystal shape
| Autor: | S.K. Hilal, Y.M. Ro, Zang-Hee Cho, Chi-Woong Mun, Y.S. Kim |
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| Rok vydání: | 1989 |
| Předmět: |
Coupling
Physics Nuclear and High Energy Physics Physics::Instrumentation and Detectors business.industry Physics::Medical Physics Detector Photodetector Particle detector Photocathode Crystal Optics Nuclear Energy and Engineering Scintillation counter Shape optimization Electrical and Electronic Engineering business |
| Zdroj: | IEEE Transactions on Nuclear Science. 36:1043-1046 |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/23.34602 |
| Popis: | A detector shape optimization study was carried out for the high-resolution 4*4 array BGO-PMT (bismuth-germanate-photomultiplier-tube) coupling scheme to be used in the spherical positron emission tomograph. To improve the light collection efficiency in the BGO detector array, the authors used bullet-nose-shaped BGO crystal at both the front- and the back-side of the detector, the latter being coupled to the PMT's photocathode. It was hypothesized that the smooth, round front-side bullet-nose shape, by eliminating the sharp corners of the crystal, would improve the light collection efficiency and that the bullet-nose shape at the back-side of crystal, coupled to the PMT, would provide optimal coupling between the crystal and the PMT by the focusing property of the bullet-nose shape. Computer simulations and experimental studies were carried out, confirming these suppositions. > |
| Databáze: | OpenAIRE |
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