Simulated performance of the optical Thomson scattering diagnostic designed for the National Ignition Facility

Journal Article · Tue Nov 15 00:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4959568· OSTI ID:22596582

Datte, P.; Divol, L.; Galbraith, J.; Hatch, B.; Landen, O.; Manuel, A. M.; Molander, W.; Moody, J. D.; Swadling, G. ^[1]; Froula, D. H.; Katz, J. ^[2]; Glenzer, S. H. ^[3]; Kilkenny, J. ^[4]; Montgomery, D. S. ^[5]; Weaver, J. ^[6]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
3. SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)
4. General Atomics, San Diego, California 92186 (United States)
5. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
6. Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375 (United States)

An optical Thomson scattering diagnostic has been designed for the National Ignition Facility to characterize under-dense plasmas. We report on the design of the system and the expected performance for different target configurations. The diagnostic is designed to spatially and temporally resolve the Thomson scattered light from laser driven targets. The diagnostic will collect scattered light from a 50 × 50 × 200 μm volume. The optical design allows operation with different probe laser wavelengths. A deep-UV probe beam (λ{sub 0} = 210 nm) will be used to Thomson scatter from electron plasma densities of ∼5 × 10{sup 20} cm{sup −3} while a 3ω probe will be used for plasma densities of ∼1 × 10{sup 19} cm{sup −3}. The diagnostic package contains two spectrometers: the first to resolve Thomson scattering from ion acoustic wave fluctuations and the second to resolve scattering from electron plasma wave fluctuations. Expected signal levels relative to background will be presented for typical target configurations (hohlraums and a planar foil).

• OSTI ID: 22596582
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 Author(s); 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
CONFIGURATION
DESIGN
ELECTRON PLASMA WAVES
ELECTRONS
FLUCTUATIONS
FOILS
IGNITION
ION ACOUSTIC WAVES
IONS
LASERS
PERFORMANCE
PLASMA DENSITY
PROBES
SIGNALS
SIMULATION
SPECTROMETERS
THOMSON SCATTERING
WAVELENGTHS