29 May 2013 Performance of a compact position-sensitive photon counting detector with image charge coupling to an air-side anode
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Abstract
We discuss a novel micro-channel plate (MCP) photomultiplier with resistive screen (RS-PMT) as a detection device for space- and time-correlated single photon counting, illustrated by several applications. The photomultiplier tube resembles a standard image intensifier device. However, the rear phosphor screen is replaced by a ceramic “window” with resistive coating. The MCP output is transferred through the ceramic plate to the read-out electrode (on the air side) via capacity-coupling of the image charge. This design allows for an easy reconfiguration of the read-out electrode (e.g. pixel, charge-sharing, cross-strip, delay-line) without breaking the vacuum for optimizing the detector performance towards a certain task. It also eases the design and manufacturing process of such a multi-purpose photomultiplier tube. Temporal and spatial resolutions well below 100 ps and 100 microns, respectively, have been reported at event rates as high as 1 MHz, for up to 40 mm effective detection diameter. In this paper we will discuss several applications like wide-field fluorescence microscopy and dual γ/fast-neutron radiography for air cargo screening and conclude with an outlook on large-area detectors for thermal neutrons based on MCPs.
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O. Jagutzki, O. Jagutzki, A. Czasch, A. Czasch, S. Schössler, S. Schössler, } "Performance of a compact position-sensitive photon counting detector with image charge coupling to an air-side anode", Proc. SPIE 8727, Advanced Photon Counting Techniques VII, 87270T (29 May 2013); doi: 10.1117/12.2016016; https://doi.org/10.1117/12.2016016
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