A compact neutron spectrometer for characterizing inertial confinement fusion implosions at OMEGA and the NIF

被引：5

作者：

Zylstra, A. B. ^{[1
]}

Johnson, M. Gatu ^{[1
]}

Frenje, J. A. ^{[1
]}

Seguin, F. H. ^{[1
]}

Rinderknecht, H. G. ^{[1
]}

Rosenberg, M. J. ^{[1
]}

Sio, H. W. ^{[1
]}

Li, C. K. ^{[1
]}

Petrasso, R. D. ^{[1
]}

McCluskey, M.

Mastrosimone, D. ^{[2
]}

Glebov, V. Yu. ^{[2
]}

Forrest, C. ^{[2
]}

Stoeckl, C. ^{[2
]}

Sangster, T. C. ^{[2
]}

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[2] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 06期

基金：

美国国家科学基金会;

关键词：

NATIONAL-IGNITION-FACILITY; PLASTIC TRACK DETECTOR; PERFORMANCE; UNIFORMITY; SPECTRA; PLASMAS; DESIGN;

D O I：

10.1063/1.4880203

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A compact spectrometer for measurements of the primary deuterium-tritium neutron spectrum has been designed and implemented on the OMEGA laser facility [T. Boehly et al., Opt. Commun. 133, 495 (1997)]. This instrument uses the recoil spectrometry technique, where neutrons produced in an implosion elastically scatter protons in a plastic foil, which are subsequently detected by a proton spectrometer. This diagnostic is currently capable of measuring the yield to similar to +/- 10% accuracy, and mean neutron energy to similar to +/- 50 keV precision. As these compact spectrometers can be readily placed at several locations around an implosion, effects of residual fuel bulk flows during burn can be measured. Future improvements to reduce the neutron energy uncertainty to +/- 15-20 keV are discussed, which will enable measurements of fuel velocities to an accuracy of similar to +/- 25-40 km/s. (C) 2014 AIP Publishing LLC.

引用

页数：9

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