skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Simulation study of enhancing laser driven multi-keV line-radiation through application of external magnetic fields

Abstract

Here, we present a path forward for enhancing laser driven, multi-keV line-radiation from mid- to high-Z, sub-quarter-critical density, non-equilibrium plasmas through inhibited thermal transport in the presence of an externally generated magnetic field. Preliminary simulations with Kr and Ag suggest that as much as 50%–100% increases in peak electron temperatures are possible—without any changes in laser drive conditions—with magnetized interactions. The increase in temperature results in ~2–3× enhancements in laser-to-x-ray conversion efficiency for K-shell emission with simultaneous ≲4× reduction in L-shell emission using current field generation capabilities on the Omega laser and near-term capabilities on the National Ignition Facility laser. Increased plasma temperatures and enhanced K-shell emission are observed to come at the cost of degraded volumetric heating. Such enhancements in high-photon-energy x-ray sources could expand the existing laser platforms for increasingly penetrating x-ray radiography.

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1357372
Alternate Identifier(s):
OSTI ID: 1329490
Report Number(s):
LLNL-JRNL-692158
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 10; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 70 PLASMA PHYSICS AND FUSION

Citation Formats

Kemp, G. E., Colvin, J. D., Blue, B. E., and Fournier, K. B. Simulation study of enhancing laser driven multi-keV line-radiation through application of external magnetic fields. United States: N. p., 2016. Web. doi:10.1063/1.4965236.
Kemp, G. E., Colvin, J. D., Blue, B. E., & Fournier, K. B. Simulation study of enhancing laser driven multi-keV line-radiation through application of external magnetic fields. United States. https://doi.org/10.1063/1.4965236
Kemp, G. E., Colvin, J. D., Blue, B. E., and Fournier, K. B. 2016. "Simulation study of enhancing laser driven multi-keV line-radiation through application of external magnetic fields". United States. https://doi.org/10.1063/1.4965236. https://www.osti.gov/servlets/purl/1357372.
@article{osti_1357372,
title = {Simulation study of enhancing laser driven multi-keV line-radiation through application of external magnetic fields},
author = {Kemp, G. E. and Colvin, J. D. and Blue, B. E. and Fournier, K. B.},
abstractNote = {Here, we present a path forward for enhancing laser driven, multi-keV line-radiation from mid- to high-Z, sub-quarter-critical density, non-equilibrium plasmas through inhibited thermal transport in the presence of an externally generated magnetic field. Preliminary simulations with Kr and Ag suggest that as much as 50%–100% increases in peak electron temperatures are possible—without any changes in laser drive conditions—with magnetized interactions. The increase in temperature results in ~2–3× enhancements in laser-to-x-ray conversion efficiency for K-shell emission with simultaneous ≲4× reduction in L-shell emission using current field generation capabilities on the Omega laser and near-term capabilities on the National Ignition Facility laser. Increased plasma temperatures and enhanced K-shell emission are observed to come at the cost of degraded volumetric heating. Such enhancements in high-photon-energy x-ray sources could expand the existing laser platforms for increasingly penetrating x-ray radiography.},
doi = {10.1063/1.4965236},
url = {https://www.osti.gov/biblio/1357372}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 10,
volume = 23,
place = {United States},
year = {Thu Oct 20 00:00:00 EDT 2016},
month = {Thu Oct 20 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Seeding magnetic fields for laser-driven flux compression in high-energy-density plasmas
journal, April 2009


An electron conductivity model for dense plasmas
journal, January 1984


Imposed magnetic field and hot electron propagation in inertial fusion hohlraums
journal, December 2015


An implicit Monte Carlo scheme for calculating time and frequency dependent nonlinear radiation transport
journal, December 1971


X-ray diffraction diagnostic design for the National Ignition Facility
conference, September 2013


Interstellare Magnetfelder
journal, May 1950


VISRAD—A 3-D view factor code and design tool for high-energy density physics experiments
journal, September 2003


Multi-keV x-ray source development experiments on the National Ignition Facility
journal, August 2010


OMEGA Upgrade laser for direct-drive target experiments
journal, June 1993


Non-LTE kinetics modeling of krypton ions: Calculations of radiative cooling coefficients
journal, June 2006


Advances in NLTE modeling for integrated simulations
journal, January 2010


An Improved Algebraic Multigrid Method for Solving Maxwell's Equations
journal, January 2003


Electron-density scaling of conversion efficiency of laser energy into L-shell X-rays
journal, May 2006


Tuning the Implosion Symmetry of ICF Targets via Controlled Crossed-Beam Energy Transfer
journal, January 2009


Krypton K-shell X-ray spectra recorded by the HENEX spectrometer
journal, May 2006


Energy transfer between crossing laser beams
journal, January 1996


Solid Iron Compressed Up to 560 GPa
journal, August 2013


Calculation of the radiative cooling coefficient for krypton in a low density plasma
journal, April 2000


The physics basis for ignition using indirect-drive targets on the National Ignition Facility
journal, February 2004


Magnetic flux and heat losses by diffusive, advective, and Nernst effects in magnetized liner inertial fusion-like plasma
journal, April 2015


A higher-than-predicted measurement of iron opacity at solar interior temperatures
journal, December 2014


Use of external magnetic fields in hohlraum plasmas to improve laser-coupling
journal, January 2015


Laser–plasma interactions in ignition‐scale hohlraum plasmas
journal, May 1996


A computational study of x-ray emission from high-Z x-ray sources on the National Ignition Facility laser
journal, December 2011


Laser ray tracing and power deposition on an unstructured three-dimensional grid
journal, January 2000


Opacity spectrometer design for opacity measurements at the National Ignition Facility
conference, August 2015


Basic considerations for scaling Z ‐pinch x‐ray emission with atomic number
journal, February 1990


Nernst effect in laser-produced plasmas
journal, January 1985


Three-dimensional HYDRA simulations of National Ignition Facility targets
journal, May 2001


Works referencing / citing this record:

Nernst thermomagnetic waves in magnetized high energy density plasmas
journal, November 2019


Confinement of laser plasma expansion with strong external magnetic field
journal, March 2018