title: High-resolution spectroscopy used to measure inertial confinement fusion neutron spectra on Omega (invited).
abstract: The areal density (ρR) of cryogenic DT implosions on Omega is inferred by measuring the spectrum of neutrons that elastically scatter off the dense deuterium (D) and tritium (T) fuel. Neutron time-of-flight (nTOF) techniques are used to measure the energy spectrum with high resolution. High signal-to-background data has been recorded on cryogenic DT implosions using a well-collimated 13.4-m line of sight and an nTOF detector with an advanced liquid scintillator compound. An innovative method to analyze the elastically scattered neutron spectra was developed using well-known cross sections of the DT nuclear reactions. The estimated areal densities are consistent with alternative ρR measurements and 1-D simulations.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, New York 14623-1299, USA. cforrest@lle.rochester.edu
authors.forename: C J
authors.initials: CJ
authors.lastname: Forrest
authors.forename: P B
authors.initials: PB
authors.lastname: Radha
authors.forename: V Yu
authors.initials: VY
authors.lastname: Glebov
authors.forename: V N
authors.initials: VN
authors.lastname: Goncharov
authors.forename: J P
authors.initials: JP
authors.lastname: Knauer
authors.forename: A
authors.initials: A
authors.lastname: Pruyne
authors.forename: M
authors.initials: M
authors.lastname: Romanofsky
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: M J
authors.initials: MJ
authors.lastname: Shoup
authors.forename: C
authors.initials: C
authors.lastname: Stoeckl
authors.forename: D T
authors.initials: DT
authors.lastname: Casey
authors.forename: M
authors.initials: M
authors.lastname: Gatu-Johnson
authors.forename: S
authors.initials: S
authors.lastname: Gardner