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Content Provider | IEEE Xplore Digital Library |
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Author | Tremsin, A.S. Feller, W.B. Downing, R.G. Mildner, D.F.R. |
Copyright Year | 2004 |
Description | Author affiliation: Space Sci. Lab., UC Berkeley, CA, USA (Tremsin, A.S.) |
Abstract | Detectors with microchannel plates (MCPs) are currently widely used in photon and charged particle detection with high spatial (/spl sim/10 /spl mu/m) and temporal (<0.5 ns) resolution. All the advances in MCP detection technologies can be successfully implemented for the detection of thermal neutrons by using microchannel plates manufactured from a modified glass mixture doped with neutron absorbing atoms. In this paper we compare the efficiency of thermal neutron detection for two standard MCP geometries: circular-pore and square-pore microchannel plates doped with the /sup 10/B isotope. The results of our modeling indicate that the detection of thermal neutrons with a square-pore MCP is 11-23% more efficient than for the circular geometry, and can be as high as /spl sim/80% for the existing MCP technology. The same microchannel plates can be used as very efficient and compact thermal neutron collimators. In this paper we compare the efficiency of circular- and square-pore MCP collimators with the help of our model, the validity of which has already been verified by our experimental measurements reported last year. The rocking curve of 5 mm and 2.5 mm thick MCPs doped with 3 mole% of /sup nat/Gd/sub 2/O/sub 3/ is predicted to be only /spl plusmn/0.1/spl deg/ and /spl plusmn/0.3/spl deg/ wide, respectively, for both geometries. A very compact device with high thermal neutron detection efficiency and angular sensitivity can be built by combining an MCP neutron detector with an MCP collimator. |
Starting Page | 340 |
Ending Page | 344 |
File Size | 655840 |
Page Count | 5 |
File Format | |
ISBN | 0780387007 |
ISSN | 10823654 |
e-ISBN | 0780387015 |
DOI | 10.1109/NSSMIC.2004.1462209 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2004-10-16 |
Publisher Place | Italy |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Neutrons Collimators Microchannel Geometry Detectors Spatial resolution Glass manufacturing Isotopes Solid modeling Network address translation |
Content Type | Text |
Resource Type | Article |
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