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Title: Anomalous Absorption by the Two-Plasmon Decay Instability

Journal Article · · Physical Review Letters

Radiation-hydrodynamic simulations of directly driven fusion experiments at the Omega Laser Facility predict absorption accurately when targets are driven at low overlapped laser intensity. Discrepancies appear at increased intensity, however, with higher-than-expected laser absorption on target. Strong correlations with signatures of the two-plasmon decay (TPD) instability—including half-harmonic and hard-x-ray emission—indicate that TPD is responsible for this anomalous absorption. Scattered light data suggest that up to 30 % of the laser power reaching quarter-critical density can be absorbed locally when the TPD threshold is exceeded. A scaling of absorption versus TPD threshold parameter was empirically determined and validated using the laser–plasma simulation environment code.

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:
1618431
Report Number(s):
2019-310, 1565, 2521; PRLTAO; 2019-310, 1565, 2521; TRN: US2106817
Journal Information:
Physical Review Letters, Vol. 124, Issue 18; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (36)

Time-resolved absorption in cryogenic and room-temperature direct-drive implosions journal May 2008
Role of Hot-Electron Preheating in the Compression of Direct-Drive Imploding Targets with Cryogenic D 2 Ablators journal May 2008
Hot-electron production and suprathermal heat flux scaling with laser intensity from the two-plasmon–decay instability journal October 2012
Saturation of the Two-Plasmon Decay Instability in Long-Scale-Length Plasmas Relevant to Direct-Drive Inertial Confinement Fusion journal April 2012
Determining acceptable limits of fast-electron preheat in direct-drive-ignition–scale target designs journal June 2019
Effects of laser-plasma instabilities on hydro evolution in an OMEGA-EP long-scale-length experiment journal February 2017
Laser-direct-drive program: Promise, challenge, and path forward journal March 2017
Simulations and measurements of hot-electron generation driven by the multibeam two-plasmon-decay instability journal October 2017
Crossed-beam energy transfer in direct-drive implosions journal May 2012
Two-plasmon-decay instability in direct-drive inertial confinement fusion experiments journal May 2009
Early stage of implosion in inertial confinement fusion: Shock timing and perturbation evolution journal January 2006
Improving the hot-spot pressure and demonstrating ignition hydrodynamic equivalence in cryogenic deuterium–tritium implosions on OMEGA journal May 2014
The dynamics of hot-electron heating in direct-drive-implosion experiments caused by two-plasmon-decay instability journal February 2012
Generating energetic electrons through staged acceleration in the two-plasmon-decay instability in inertial confinement fusion journal April 2012
Unified Theory of Stimulated Raman Scattering and Two-Plasmon Decay in Inhomogeneous Plasmas: High Frequency Hybrid Instability journal December 1995
Measurement of preheat due to fast electrons in laser implosions of cryogenic deuterium targets journal June 2005
Parametric decay of electromagnetic waves into two plasmons and its consequences journal January 1976
On the inhomogeneous two-plasmon instability journal January 1983
Direct drive: Simulations and results from the National Ignition Facility journal April 2016
Measured hot-electron intensity thresholds quantified by a two-plasmon-decay resonant common-wave gain in various experimental configurations journal May 2013
Nonuniformly Driven Two-Plasmon-Decay Instability in Direct-Drive Implosions journal April 2014
Laser-plasma interaction in direct-drive inertial confinement fusion journal May 2016
Effect of laser illumination nonuniformity on the analysis of time-resolved x-ray measurements in uv spherical transport experiments journal October 1987
Measurements of the divergence of fast electrons in laser-irradiated spherical targets journal September 2013
Direct-drive inertial confinement fusion: A review journal November 2015
Mitigation of two-plasmon decay in direct-drive inertial confinement fusion through the manipulation of ion-acoustic and Langmuir wave damping journal May 2013
Analysis of trends in experimental observables: Reconstruction of the implosion dynamics and implications for fusion yield extrapolation for direct-drive cryogenic targets on OMEGA journal June 2018
Two-Plasmon Decay Mitigation in Direct-Drive Inertial-Confinement-Fusion Experiments Using Multilayer Targets journal April 2016
LPSE: A 3-D wave-based model of cross-beam energy transfer in laser-irradiated plasmas journal December 2019
Refractive Index Seen by a Probe Beam Interacting with a Laser-Plasma System journal January 2017
Crossed-beam energy transfer: polarization effects and evidence of saturation journal April 2018
Direct observation of the two-plasmon-decay common plasma wave using ultraviolet Thomson scattering journal March 2015
Multiple Beam Two-Plasmon Decay: Linear Threshold to Nonlinear Saturation in Three Dimensions journal September 2014
Crossed-beam energy transfer in implosion experiments on OMEGA journal December 2010
Multibeam Effects on Fast-Electron Generation from Two-Plasmon-Decay Instability journal June 2003
A variational approach to parametric instabilities in inhomogeneous plasmas IV: The mixed polarization high-frequency instability journal November 1997

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