High-dynamic-range neutron time-of-flight detector used to infer the D(t,n)He-4 and D(d,n)He-3 reaction yield and ion temperature on OMEGA

作者：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 III; Stoeckl C

来源：Review of Scientific Instruments, 2016, 87(11): 11D814.

DOI：10.1063/1.4960412

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 C15H11NO + 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 x 10(6). With these enhancements, the 13.4-m nTOF can measure the D(t,n)He-4 and D(d,n)He-3 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 x 10(9) to 1 x 10(14) and the ion temperature with an accuracy approaching 5% for both the D(t,n)He-4 and D(d,n)He-3 reactions. Published by AIP Publishing.

• 出版日期2016-11