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Title: Investigation of ion kinetic effects in direct-drive exploding-pusher implosions at the NIF

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4905064· OSTI ID:1546778
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  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. General Atomics, San Diego, CA (United States)

Measurements of yield, ion temperature, areal density (ρR), shell convergence, and bang time have been obtained in shock-driven, D2 and D3He gas-filled “exploding-pusher” inertial confinement fusion (ICF) implosions at the National Ignition Facility to assess the impact of ion kinetic effects. These measurements probed the shock convergence phase of ICF implosions, a critical stage in hot-spot ignition experiments. The data complement previous studies of kinetic effects in shock-driven implosions. Ion temperature and fuel ρR inferred from fusion-product spectroscopy are used to estimate the ion-ion mean free path in the gas. A trend of decreasing yields relative to the predictions of 2D draco hydrodynamics simulations with increasing Knudsen number (the ratio of ion-ion mean free path to minimum shell radius) suggests that ion kinetic effects are increasingly impacting the hot fuel region, in general agreement with previous results. Lastly, the long mean free path conditions giving rise to ion kinetic effects in the gas are often prevalent during the shock phase of both exploding pushers and ablatively driven implosions, including ignition-relevant implosions.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001857; B600100
OSTI ID:
1546778
Alternate ID(s):
OSTI ID: 1226645
Journal Information:
Physics of Plasmas, Vol. 21, Issue 12; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

References (63)

Progress towards ignition on the National Ignition Facility journal July 2013
Polar-drive implosions on OMEGA and the National Ignition Facility journal May 2013
Direct-drive, cryogenic target implosions on OMEGA journal May 2005
Fuel gain exceeding unity in an inertially confined fusion implosion journal February 2014
Charged-particle acceleration and energy loss in laser-produced plasmas journal December 2000
Neutron spectra from inertial confinement fusion targets for measurement of fuel areal density and charged particle stopping powers journal September 1987
D–3He proton spectra for diagnosing shell ρR and fuel Ti of imploded capsules at OMEGA journal June 2000
Assembly of High-Areal-Density Deuterium-Tritium Fuel from Indirectly Driven Cryogenic Implosions journal May 2012
Improving the hot-spot pressure and demonstrating ignition hydrodynamic equivalence in cryogenic deuterium–tritium implosions on OMEGA journal May 2014
Prototypes of National Ignition Facility neutron time-of-flight detectors tested on OMEGA journal October 2004
Precision Shock Tuning on the National Ignition Facility journal May 2012
The production spectrum in fusion plasmas journal February 2011
Species separation in inertial confinement fusion fuels journal January 2013
The effect of turbulent kinetic energy on inferred ion temperature from neutron spectra journal July 2014
Using nuclear data and Monte Carlo techniques to study areal density and mix in D2 implosions journal March 2005
Scaling laws for laser driven exploding pusher targets journal May 1981
2-D Lagrangian studies of symmetry and stability of laser fusion targets journal December 1986
Tuning the Implosion Symmetry of ICF Targets via Controlled Crossed-Beam Energy Transfer journal January 2009
Species separation and modification of neutron diagnostics in inertial-confinement fusion journal September 2014
Using secondary-proton spectra to study the compression and symmetry of deuterium-filled capsules at OMEGA journal June 2002
Effect of laser illumination nonuniformity on the analysis of time-resolved x-ray measurements in uv spherical transport experiments journal October 1987
Measuring symmetry of implosions in cryogenic Hohlraums at the NIF using gated x-ray detectors (invited) journal October 2010
South pole bang-time diagnostic on the National Ignition Facility (invited) journal October 2012
Observation of a Reflected Shock in an Indirectly Driven Spherical Implosion at the National Ignition Facility journal June 2014
Exploration of the Transition from the Hydrodynamiclike to the Strongly Kinetic Regime in Shock-Driven Implosions journal May 2014
Revised Knudsen-layer reduction of fusion reactivity journal December 2013
Implosion dynamics measurements at the National Ignition Facility journal December 2012
K-L turbulence model for the self-similar growth of the Rayleigh-Taylor and Richtmyer-Meshkov instabilities journal August 2006
Design of a High-Foot High-Adiabat ICF Capsule for the National Ignition Facility journal February 2014
Polar-direct-drive simulations and experiments journal May 2006
Two-dimensional simulations of the neutron yield in cryogenic deuterium-tritium implosions on OMEGA journal October 2010
A novel particle time of flight diagnostic for measurements of shock- and compression-bang times in D 3 He and DT implosions at the NIF journal October 2012
Polar direct drive on the National Ignition Facility journal May 2004
Neutron activation diagnostics at the National Ignition Facility (invited) journal October 2012
Influence of high-energy ion loss on DT reaction rate in laser fusion pellets journal December 1979
Development of nuclear diagnostics for the National Ignition Facility (invited) journal October 2006
Improving cryogenic deuterium–tritium implosion performance on OMEGA journal May 2013
DT Fusion with Microshells journal February 1975
Kinetic simulations of fuel ion transport in ICF target implosions journal November 2003
Evidence for Stratification of Deuterium-Tritium Fuel in Inertial Confinement Fusion Implosions journal February 2012
First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions journal April 2014
A study of ALE simulations of Rayleigh–Taylor instability journal March 2001
A nonlocal electron conduction model for multidimensional radiation hydrodynamics codes journal January 2000
Thermal electron transport in direct-drive laser fusion journal August 1986
Cryogenic thermonuclear fuel implosions on the National Ignition Facility journal May 2012
Spectrometry of charged particles from inertial-confinement-fusion plasmas journal February 2003
Advances in compact proton spectrometers for inertial-confinement fusion and plasma nuclear science journal October 2012
A hardened gated x-ray imaging diagnostic for inertial confinement fusion experiments at the National Ignition Facility journal October 2010
Two-dimensional simulations of plastic-shell, direct-drive implosions on OMEGA journal March 2005
Laser Fusion Experiments at 4 TW journal June 1978
The National Ignition Facility journal December 2004
Charged-particle spectroscopy for diagnosing shock ρR and strength in NIF implosions journal October 2012
Exploding pusher performance − A theoretical model journal January 1979
A magnetic particle time-of-flight (MagPTOF) diagnostic for measurements of shock- and compression-bang time at the NIF (invited) journal November 2014
Time-Dependent Electron Thermal Flux Inhibition in Direct-Drive Laser Implosions journal August 2003
A compact proton spectrometer for measurement of the absolute DD proton spectrum from which yield and ρR are determined in thin-shell inertial-confinement-fusion implosions journal October 2014
Knudsen Layer Reduction of Fusion Reactivity journal August 2012
Ion Fokker-Planck simulation of D- 3 He gas target implosions journal December 2012
Direct-drive cryogenic target implosion performance on OMEGA journal May 2004
The magnetic recoil spectrometer for measurements of the absolute neutron spectrum at OMEGA and the NIF journal April 2013
The National Ignition Facility conference May 2004
Direct-drive cryogenic target implosion performance on OMEGA journal May 2003
Species separation and modification of neutron diagnostics in inertial-confinement fusion text January 2014

Cited By (12)

Nuclear diagnosis of the fuel areal density for direct-drive deuterium fuel implosion at the Shenguang-II Upgrade laser facility journal December 2018
Assessment of ion kinetic effects in shock-driven inertial confinement fusion implosions using fusion burn imaging journal June 2015
Using multiple secondary fusion products to evaluate fuel ρR, electron temperature, and mix in deuterium-filled implosions at the NIF journal August 2015
Ion-kinetic simulations of D- 3 He gas-filled inertial confinement fusion target implosions with moderate to large Knudsen number journal January 2016
Resolving hot spot microstructure using x-ray penumbral imaging (invited) journal August 2016
Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments journal May 2018
Ion species stratification within strong shocks in two-ion plasmas journal March 2018
Development and modeling of a polar-direct-drive exploding pusher platform at the National Ignition Facility journal July 2018
Hybrid particle-in-cell simulations of laser-driven plasma interpenetration, heating, and entrainment journal November 2019
Kinetic physics in ICF: present understanding and future directions journal April 2018
Deciphering the Kinetic Structure of Multi-Ion Plasma Shocks text January 2017
Ion Species Stratification Within Strong Shocks in Two-Ion Plasmas text January 2017

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