GEM;
radiation detector;
digital imaging device;
readout electronics;
multichannel readout;
D O I:
10.1016/j.radmeas.2007.09.009
中图分类号:
TL [原子能技术];
O571 [原子核物理学];
学科分类号:
0827 ;
082701 ;
摘要:
We fabricated a gas electron multiplier (GEM) for application to digital imaging devices such as X-ray or gamma-ray detectors. Sixty-four square (3 x 3 mm) copper pads were used to collect avalanched electron charge clusters from the GEM chamber. A 128-channel charge sensitive preamplifier, which also includes sample/hold amplifiers and a multiplexer, was used as the front end electronics of the readout circuits for data acquisition. With this system, we successfully took a two-dimensional digital image under the irradiation of the Fe-55 radiation source. (C) 2007 Elsevier Ltd. All rights reserved.