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Author Forrest, C. J. ♦ Glebov, V. Yu. ♦ Goncharov, V. N. ♦ Knauer, J. P. ♦ Radha, P. B. ♦ Regan, S. P. ♦ Romanofsky, M. H. ♦ Sangster, T. C. ♦ Shoup, M. J. ♦ Stoeckl, C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ ACCURACY ♦ BENZENE ♦ DIAGNOSTIC USES ♦ DOPED MATERIALS ♦ DYES ♦ GAIN ♦ HARBORS ♦ HELIUM 3 ♦ HELIUM 4 ♦ ION TEMPERATURE ♦ LASERS ♦ MICROCHANNEL ELECTRON MULTIPLIERS ♦ NEUTRONS ♦ PHOTOMULTIPLIERS ♦ SENSITIVITY ♦ SHAPE ♦ SIGNALS ♦ TIME-OF-FLIGHT METHOD ♦ XYLENES ♦ YIELDS
Abstract Upgraded microchannel-plate–based photomultiplier tubes (MCP-PMT’s) with increased stability to signal-shape linearity have been implemented on the 13.4-m neutron time-of-flight (nTOF) detector at the Omega Laser Facility. This diagnostic uses oxygenated xylene doped with diphenyloxazole C{sub 15}H{sub 11}NO + p-bis-(o-methylstyryl)-benzene (PPO + bis-MSB) wavelength shifting dyes and is coupled through four viewing ports to fast-gating MCP-PMT’s, each with a different gain to allow one to measure the light output over a dynamic range of 1 × 10{sup 6}. With these enhancements, the 13.4-m nTOF can measure the D(t,n){sup 4}He and D(d,n){sup 3}He reaction yields and average ion temperatures in a single line of sight. Once calibrated for absolute neutron sensitivity, the nTOF detectors can be used to measure the neutron yield from 1 × 10{sup 9} to 1 × 10{sup 14} and the ion temperature with an accuracy approaching 5% for both the D(t,n){sup 4}He and D(d,n){sup 3}He reactions.
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-11-15
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 87
Issue Number 11


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