Abstract
Microchannel plate (MCP) gain linearity for high output count rate operation can be extended one to two orders of magnitude, by bonding the MCP to a heat sink [W.B. Feller, Proc. SPIE 1243 (1990) 149]. MCPs in conventional mounting configurations must dissipate resistive heating radiatively, constraining the maximum output count rate to 10 8 − 10 9 cm −2 s −1. A very low resistance MCP was indium-bonded to metal anode pads on a ceramic substrate. Under continuous duty cycle operation, and at very high bias currents (several mA), normal pulse-counting operation was observed at near-ambient temperatures, with measured output count rates approaching 10 10 cm −2 s −1.
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