We have studied the performance of two different types of front-end systems for our gamma camera based on Hamamatsu H8500 (flat-panel 64 channels multi-anode PSPMT) with a CsI(Tl) scintillator array. The array consists of 64 pixels of 6×6×20mm3 which corresponds to the anode pixels of H8500. One of the system is based on commercial ASIC chips in order to readout every anode. The others are based on resistive charge divider network between anodes to reduce readout channels. In both systems, each pixel (6mm) was clearly resolved by flood field irradiation of 137Cs. We also investigated the energy resolution of these systems and showed the performance of the cascade connection of resistive network between some PMTs for large area detectors.
@article{arxiv.physics/0510221,
title = {Studies of the performance of different front-end systems for flat-panel multi-anode PMTs with CsI(Tl) scintillator arrays},
author = {H. Sekiya and K. Hattori and H. Kubo and K. Miuchi and T. Nagayoshi and H. Nishimura and Y. Okada and R. Orito and A. Takada and A. Takeda and T. Tanimori and K. Ueno},
journal= {arXiv preprint arXiv:physics/0510221},
year = {2009}
}
Comments
9 pages, 6 figures, proceedings of the 7th International Workshop on Radiation Imaging Detectors (IWORID7), submitted to NIMA