2K×2K resolution element photon counting MCP sensor with >200 kHz event rate capability
2000; Elsevier BV; Volume: 442; Issue: 1-3 Linguagem: Inglês
10.1016/s0168-9002(99)01215-2
ISSN1872-9576
Autores Tópico(s)Radiation Therapy and Dosimetry
ResumoSiegmund Scientific undertook a NASA Small Business Innovative Research (SBIR) contract to develop a versatile, high-performance photon (or particle) counting detector combining recent technical advances in all aspects of Microchannel Plate (MCP) detector development in a low cost, commercially viable package that can support a variety of applications. The detector concept consists of a set of MCPs whose output electron pulses are read out with a crossed delay line (XDL) anode and associated high-speed event encoding electronics. The delay line anode allows high-resolution photon event centroiding at very high event rates and can be scaled to large formats (>40 mm) while maintaining good linearity and high temporal stability. The optimal sensitivity wavelength range is determined by the choice of opaque photocathodes. Specific achievements included: spatial resolution of 200000 events s−1; local rates of >100 events s−1 per resolution element; event timing of <1ns; and low background counting rates (<1 event cm−2s−1).
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