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Title: Cross-beam energy transfer saturation: ion heating and pump depletion

Journal Article · · Plasma Physics and Controlled Fusion
ORCiD logo [1];  [2];  [3];  [4];  [3];  [3];  [3];  [3];  [3];  [4];  [3];  [3]
  1. Univ. of Rochester, NY (United States); Laboratory for Laser Energetics, University of Rochester
  2. Univ. of Rochester, NY (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of Rochester, NY (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Cross-beam energy transfer (CBET) was measured in two regimes where the energy transfer saturation mechanism was determined by the plasma and laser beam conditions. Here, linear kinetic CBET theory agrees well with the measured energy transfer in all experimental configurations and at all probe beam intensities when accounting for pump depletion and the plasma conditions measured using Thomson-scattering. Simultaneous CBET and Thomson-scattering measurements enabled uncertainties in the plasma conditions to be isolated from CBET theory, which allowed the saturation mechanisms to be identified. In the perpendicular-beam configuration the saturation mode was through ion heating, which resulted from ion trapping in the driven waves and subsequent ion-ion collisional heating. In the co-propagating beam configuration there was minimal ion heating and the saturation mode was through pump depletion.

Research Organization:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003856
OSTI ID:
1845836
Journal Information:
Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 3 Vol. 64; ISSN 0741-3335
Publisher:
IOP ScienceCopyright Statement
Country of Publication:
United States
Language:
English

References (32)

A binary collision model for plasma simulation with a particle code journal November 1977
Impact of the Langdon effect on crossed-beam energy transfer journal December 2019
The upgrade to the OMEGA laser system journal January 1995
Saturation and Spectral Characteristics of the Stokes Emission in the Stimulated Brillouin Process journal July 1966
Crossed-beam energy transfer in implosion experiments on OMEGA journal December 2010
Reduction of laser imprinting using polarization smoothing on a solid-state fusion laser journal April 1999
Magnetic bucket for rotating unmagnetized plasma journal June 2012
Self-organized coherent bursts of stimulated Raman scattering and speckle interaction in multi-speckled laser beams journal January 2013
Saturation of multi-laser beams laser-plasma instabilities from stochastic ion heating journal May 2013
New insights into the decay of ion waves to turbulence, ion heating, and soliton generation journal April 2014
Isolating and quantifying cross-beam energy transfer in direct-drive implosions on OMEGA and the National Ignition Facility journal May 2016
Full-wave and ray-based modeling of cross-beam energy transfer between laser beams with distributed phase plates and polarization smoothing journal October 2017
Supersonic gas-jet characterization with interferometry and Thomson scattering on the OMEGA Laser System journal October 2018
Saturation of cross-beam energy transfer for multispeckled laser beams involving both ion and electron dynamics journal August 2019
Theory and simulation of stimulated Brillouin scatter excited by nonabsorbed light in laser fusion systems journal January 1981
Resonantly excited nonlinear ion waves journal April 1997
A transmitted-beam diagnostic for the wavelength-tunable UV drive beam on OMEGA journal March 2021
Cross-beam energy transfer saturation by ion trapping-induced detuning journal August 2021
Non-Maxwellian electron distributions and continuum X-ray emission in inverse Bremsstrahlung heated plasmas journal November 1988
Crossed-beam energy transfer: polarization effects and evidence of saturation journal April 2018
Tuning the Implosion Symmetry of ICF Targets via Controlled Crossed-Beam Energy Transfer journal January 2009
Stochastic Ion Heating from Many Overlapping Laser Beams in Fusion Plasmas journal November 2012
Dynamic Control of the Polarization of Intense Laser Beams via Optical Wave Mixing in Plasmas journal November 2014
Interplay of Laser-Plasma Interactions and Inertial Fusion Hydrodynamics journal January 2017
Longitudinal and Transverse Instability of Ion Acoustic Waves journal August 2017
Evolution of the Electron Distribution Function in the Presence of Inverse Bremsstrahlung Heating and Collisional Ionization journal January 2020
Cross-Beam Energy Transfer Saturation by Ion Heating journal February 2021
Nonlinear Inverse Bremsstrahlung and Heated-Electron Distributions journal March 1980
Thomson Scattering Measurements of Saturated Ion Waves in Laser Fusion Plasmas journal March 2001
Observation of Saturation of Energy Transfer between Copropagating Beams in a Flowing Plasma journal November 2002
Some General Properties of Nonlinear Elements-Part I. General Energy Relations journal July 1956
Tunable UV upgrade on OMEGA EP conference March 2019