2K x 2K resolution element photon counting MCP sensor with > 200 kHz eventrate capability

Siegmund Scientific undertook a NASA Small Business Innovative Research (SB IR) contract to develop a versatile, high-performance photon (or particle) counting detector combining recent technical advances in all aspects of Mic rochannel Plate (MCP) detector development in a low cost, commercially viab le 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 el ectronics. The delay line anode allows high-resolution photon event centroi ding at very high event rates and can be scaled to large formats (> 40 mm) while maintaining good linearity and high temporal stability. The optimal s ensitivity wavelength range is determined by the choice of opaque photocath odes. Specific achievements included: spatial resolution of < 25 mu m FWHM; formats from 25 to 40 mm with digitized pixel sizes of similar to 3 mu m; total detector rates of > 200 000 events s(-1); local rates of > 100 events s(-1) per resolution element; event timing of < 1 ns; and low background c ounting rates (< 1 event cm(-2)s(-1)). (C) 2000 Elsevier Science B.V. All r ights reserved.