First measurements of the absolute neutron spectrum using the magnetic recoil spectrometer at OMEGA (invited)

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2956837· OSTI ID:21266491

Frenje, J A; Casey, D T; Li, C K; Rygg, J R; Seguin, F H; Petrasso, R D ^[1]; Yu Glebov, V; Meyerhofer, D D; Sangster, T C ^[2]; Hatchett, S; Haan, S; Cerjan, C; Landen, O; Moran, M; Song, P ^[3]; Wilson, D C ^[4]; Leeper, R J ^[5]

---

1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
4. Los Alamos National Laboratory, New Mexico 87545 (United States)
5. Sandia National Laboratory, New Mexico 87123 (United States)

A neutron spectrometer, called a magnetic recoil spectrometer (MRS), has been built and implemented at the OMEGA laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] for absolute measurements of the neutron spectrum in the range of 6-30 MeV, from which fuel areal density ({rho}R), ion temperature (T{sub i}), and yield (Y{sub n}) can be determined. The results from the first MRS measurements of the absolute neutron spectrum are presented. In addition, measuring {rho}R at the National Ignition Facility (NIF) [G. H. Miller et al., Nucl. Fusion 44, S228 (2004)] will be essential for assessing implosion performance during all stages of development from surrogate implosions to cryogenic fizzles to ignited implosions. To accomplish this, we are also developing an MRS for the NIF. As much of the research and development and instrument optimization of the MRS at OMEGA are directly applicable to the MRS at the NIF, a description of the design and characterization of the MRS on the NIF is discussed as well.

• OSTI ID: 21266491
• Journal Information: Review of Scientific Instruments, Vol. 79, Issue 10; Other Information: DOI: 10.1063/1.2956837; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DESIGN
ELECTRON TEMPERATURE
IMPLOSIONS
INERTIAL CONFINEMENT
ION TEMPERATURE
LASERS
NEUTRON SPECTRA
NEUTRON SPECTROMETERS
PLASMA DENSITY
PLASMA DIAGNOSTICS
RECOILS
US NATIONAL IGNITION FACILITY