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Title: Thermal Temperature Measurements of Inertial Fusion Implosions

Journal Article · · Physical Review Letters
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Accurate measurement of the thermal temperature in inertially confined fusion plasmas is essential for characterizing ignition performance and validating the basic physics understanding of the stagnation conditions. Here we present experimental results from cryogenic deuterium-tritium implosions on the National Ignition Facility using a differential filter spectrometer designed to measure the thermal electron temperature from x-ray continuum emission from the stagnated plasma. Furthermore, electron temperature measurements, used in conjunction with the Doppler-broadened DT neutron spectra, allow one to infer the partition of energy in the hot spot between internal energy and unconverted kinetic energy.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1482877
Report Number(s):
LLNL-JRNL--749938; 934546
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 121; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (21)

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Symmetry control of an indirectly driven high-density-carbon implosion at high convergence and high velocity journal May 2017
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High-Adiabat High-Foot Inertial Confinement Fusion Implosion Experiments on the National Ignition Facility journal February 2014
First High-Convergence Cryogenic Implosion in a Near-Vacuum Hohlraum journal April 2015
Alpha Heating and Burning Plasmas in Inertial Confinement Fusion journal June 2015
X-ray and neutron sensitivity of imaging plates conference September 2013
Species separation and modification of neutron diagnostics in inertial-confinement fusion journal September 2014
Species separation and modification of neutron diagnostics in inertial-confinement fusion text January 2014

Cited By (4)

Approaching a burning plasma on the NIF journal May 2019
Laboratory measurements of geometrical effects in the x-ray emission of optically thick lines for ICF diagnostics journal June 2019
Interpreting the electron temperature inferred from x-ray continuum emission for direct-drive inertial confinement fusion implosions on OMEGA journal August 2019
Laboratory measurements of geometrical effects in the X-ray emission of optically thick lines for ICF diagnostics text January 2019

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
indirect drive
inertial confinement fusion