Measurements of fuel and ablator ρR in Symmetry-Capsule implosions with the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility
Abstract
The Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility (NIF) measures the neutron spectrum in the energy range of 4–20 MeV. This paper describes MRS measurements of DT-fuel and CH-ablator ρR in DT gas-filled symmetry-capsule implosions at the NIF. DT-fuel ρR's of 80–140 mg/cm2 and CH-ablator ρR's of 400–680 mg/cm2 are inferred from MRS data. The measurements were facilitated by an improved correction of neutron-induced background in the low-energy part of the MRS spectrum. This work demonstrates the accurate utilization of the complete MRS-measured neutron spectrum for diagnosing NIF DT implosions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 11, 2014
- Source ID
- 10.1063/1.4886418
Entities
People
- C. K. Li
- D. B. Sayre
- D. T. Casey
- F. H. Séguin
- H. W. Herrmann
- H. Y. Khater
- J. A. Caggiano
- J. D. Kilkenny
- J. P. Knauer
- Johan A. Frenje
- M. Gatu Johnson
- R. D. Petrasso
- R. Hatarik
- R. M. Bionta
- T. C. Sangster
Organizations
- General Atomics
- Lawrence Livermore National Laboratory
- Los Alamos National Laboratory
- Massachusetts Institute of Technology
- United States Department of Energy
- University of Rochester