microchannel plate detector


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microchannel plate detector

(mÿ -kroh-chan-ĕl) (MCP) A high-resolution (15–25 μm pixel) imaging device for recording X-ray, ultraviolet, or electron images. The incident photon (or electron) strikes the front surface of a thin glass plate consisting of a very large number of fine-bore tubes (usually aligned perpendicular to the plate surfaces). Secondary electrons are produced and are accelerated down the tubes by an applied voltage, striking the walls and creating further electrons. Charge multiplication factors of about 103 (or 106 in a ‘cascaded pair’ of MCPs) yield a signal that is easily read on a collector at the rear of the plate(s). Proximity focusing ensures retention of the initial photon (or electron) image and resolutions of 20–50 μm have been achieved. MCP detectors have been used successfully in a number of X-ray astronomy satellites, including the Einstein Observatory, EXOSAT, and ROSAT. MCPs are also the basis of the highest resolution X-ray camera in AXAF–I.
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Tenders are invited for Microchannel Plate Detector
MicroChannel Plate Detector, Hamamatsu F2226-24P136 with a P46 phosphor screen or acceptable alternate meeting the following minimum specifications:
The next presentation describe d current microchannel plate detector enhancements that are aimed at increasing their sensitivity to high mass ions without compromising the detector response time.