Open AccessA compact neutron spectrometer for characterizing inertial confinement fusion implosions at OMEGA and the NIF
Author(s) -
A. B. Zylstra,
M. Gatu Johnson,
J. A. Frenje,
F. H. Séguin,
H. G. Rinderknecht,
M. J. Rosenberg,
H. Sio,
C. K. Li,
R. D. Petrasso,
Michelle McCluskey,
D. Mastrosimone,
V. Yu. Glebov,
C. J. Forrest,
C. Stöeckl,
T. C. Sangster
Publication year - 2014
Publication title -
review of scientific instruments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.605
H-Index - 165
eISSN - 1089-7623
pISSN - 0034-6748
DOI - 10.1063/1.4880203
Subject(s) - implosion , spectrometer , inertial confinement fusion , neutron , nuclear physics , physics , neutron spectroscopy , national ignition facility , deuterium , plasma diagnostics , recoil , nuclear engineering , materials science , optics , neutron scattering , plasma , engineering
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 ~±10% accuracy, and mean neutron energy 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 ~±25-40 km/s.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom