Neutron collimation with microchannel plates: calibration of existing technology and near future possibilities

A new type of high performance and compact neutron collimator can be manufactured from Gd- or B-doped microchannel plates (MCPs). Structures only a few mm thick have very narrow rocking curves and high out-of-angle rejection ratios, as observed previously with a cold neutron beam. In this paper we p...

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Bibliographic Details
Main Authors: Tremsin, A.S., Hussey, D.S., Downing, R.G., Feller, W.B., Mildner, D.F.R., Jacobson, D.L., Arif, M., Siegmund, O.H.W.
Format: Conference Proceeding
Language:English
Subjects:
Calibration
Collimators
Glass
Manufacturing
Microchannel
Network address translation
Neutrons
Particle beams
Radiography
Scattering
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Summary:A new type of high performance and compact neutron collimator can be manufactured from Gd- or B-doped microchannel plates (MCPs). Structures only a few mm thick have very narrow rocking curves and high out-of-angle rejection ratios, as observed previously with a cold neutron beam. In this paper we present the results of measurements with a collimated (L/D ratio ~280:1) thermal neutron beam. MCP collimators doped with 3 mole% of nat Gd 2 O 3 as well as doped with 10 mole% of 10 B 2 O 3 were calibrated for transmission versus tilt angle. The MCPs used in this study were only 0.6 and 0.8 mm thick with ~8.5 mum circular pores on 11.5 mum centers. All the measured rocking curves agree well with the theoretically predicted performance. Both experimental and modeling results indicate that very efficient MCP collimators (with
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2005.1596220