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Title: Performance of indirectly driven capsule implosions on the National Ignition Facility using adiabat-shaping

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4944821· OSTI ID:1259782
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

A series of indirectly driven capsule implosions has been performed on the National Ignition Facility to assess the relative contributions of ablation-front instability growth vs. fuel compression on implosion performance. Laser pulse shapes for both low and high-foot pulses were modified to vary ablation-front growth and fuel adiabat, separately and controllably. Three principal conclusions are drawn from this study: (1) It is shown that reducing ablation-front instability growth in low-foot implosions results in a substantial (3-10X) increase in neutron yield with no loss of fuel compression. (2) It is shown that reducing the fuel adiabat in high-foot implosions results in a significant (36%) increase in fuel compression together with a small (10%) increase in neutron yield. (3) Increased electron preheat at higher laser power in high-foot implosions, however, appears to offset the gain in compression achieved by adiabat-shaping at lower power. These results taken collectively bridge the space between the higher compression low-foot results and the higher yield high-foot results.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1259782
Alternate ID(s):
OSTI ID: 1420669
Report Number(s):
LLNL-PROC-680487
Journal Information:
Physics of Plasmas, Vol. 23, Issue 5; Conference: Presented at: International Fusion Sciences and Applications 2015, Seattle, WA, United States, Sep 20 - Sep 25, 2015; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

References (56)

The effects of early time laser drive on hydrodynamic instability growth in National Ignition Facility implosions journal September 2014
Progress towards ignition on the National Ignition Facility journal July 2013
Line-imaging velocimeter for shock diagnostics at the OMEGA laser facility journal November 2004
First results of radiation-driven, layered deuterium-tritium implosions with a 3-shock adiabat-shaped drive at the National Ignition Facility journal August 2015
Measurements of the effects of the intensity pickets on laser imprinting for direct-drive, adiabat-shaping designs on OMEGA journal March 2007
Fuel gain exceeding unity in an inertially confined fusion implosion journal February 2014
Stabilization of high-compression, indirect-drive inertial confinement fusion implosions using a 4-shock adiabat-shaped drive journal August 2015
Laser interferometer for measuring high velocities of any reflecting surface journal November 1972
Direct observation of mass oscillations due to ablative Richtmyer–Meshkov instability and feedout in planar plastic targets journal May 2002
High-density carbon ablator experiments on the National Ignition Facility journal May 2014
Test of Thermal Transport Models through Dynamic Overpressure Stabilization of Ablation-Front Perturbation Growth in Laser-Driven CH Foils journal March 2006
Onset of Hydrodynamic Mix in High-Velocity, Highly Compressed Inertial Confinement Fusion Implosions journal August 2013
Reduction of early-time perturbation growth in ablatively driven laser targets using tailored density profiles journal August 1999
Reduced instability growth with high-adiabat high-foot implosions at the National Ignition Facility journal July 2014
Precision Shock Tuning on the National Ignition Facility journal May 2012
Effect of the mounting membrane on shape in inertial confinement fusion implosions journal February 2015
Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility journal May 2011
Theory of laser-induced adiabat shaping in inertial fusion implosions: The decaying shock journal November 2003
Tuning the Implosion Symmetry of ICF Targets via Controlled Crossed-Beam Energy Transfer journal January 2009
2D X-Ray Radiography of Imploding Capsules at the National Ignition Facility journal May 2014
An in-flight radiography platform to measure hydrodynamic instability growth in inertial confinement fusion capsules at the National Ignition Facility journal July 2014
Direct Observation of Mass Oscillations Due to Ablative Richtmyer-Meshkov Instability in Plastic Targets journal December 2001
Suppression of Rayleigh-Taylor Instability in Z -Pinch Loads with Tailored Density Profiles journal July 1996
The National Ignition Facility: Ushering in a new age for high energy density science journal April 2009
Improved performance of direct-drive inertial confinement fusion target designs with adiabat shaping using an intensity picket journal May 2003
High-Adiabat High-Foot Inertial Confinement Fusion Implosion Experiments on the National Ignition Facility journal February 2014
Design of a High-Foot High-Adiabat ICF Capsule for the National Ignition Facility journal February 2014
First Measurements of Hydrodynamic Instability Growth in Indirectly Driven Implosions at Ignition-Relevant Conditions on the National Ignition Facility journal May 2014
Shock timing experiments on the National Ignition Facility: Initial results and comparison with simulation journal April 2012
Differential ablator-fuel adiabat tuning in indirect-drive implosions journal March 2015
Three-dimensional HYDRA simulations of National Ignition Facility targets journal May 2001
Symmetry tuning for ignition capsules via the symcap technique journal May 2011
Adiabat-shaping in indirect drive inertial confinement fusion journal May 2015
Optimized beryllium target design for indirectly driven inertial confinement fusion experiments on the National Ignition Facility journal February 2014
Hot-Spot Mix in Ignition-Scale Inertial Confinement Fusion Targets journal July 2013
Tent-induced perturbations on areal density of implosions at the National Ignition Facilitya) journal May 2015
Deuterium-Tritium Fuel Layer Formation for the National Ignition Facility journal January 2011
Theory of laser-induced adiabat shaping in inertial fusion implosions: The relaxation method journal April 2005
Numerical simulation of ablative Rayleigh–Taylor instability journal April 1991
A nonlocal electron conduction model for multidimensional radiation hydrodynamics codes journal January 2000
The Physics of Inertial Fusion book January 2004
A survey of pulse shape options for a revised plastic ablator ignition design journal November 2014
Validating hydrodynamic growth in National Ignition Facility implosionsa) journal May 2015
Creating High-Energy-Density Conditions book January 2006
Radiochemical determination of Inertial Confinement Fusion capsule compression at the National Ignition Facility journal June 2014
Convergent ablator performance measurements journal October 2010
The physics basis for ignition using indirect-drive targets on the National Ignition Facility journal February 2004
Instability of the interface of two gases accelerated by a shock wave journal January 1972
The instability of liquid surfaces when accelerated in a direction perpendicular to their planes. I journal March 1950
Direct-drive laser fusion: Status and prospects journal May 1998
Design of indirectly driven, high-compression Inertial Confinement Fusion implosions with improved hydrodynamic stability using a 4-shock adiabat-shaped drive journal December 2015
Taylor instability in shock acceleration of compressible fluids journal May 1960
Hot electron measurements in ignition relevant Hohlraums on the National Ignition Facility journal October 2010
Improved Performance of High Areal Density Indirect Drive Implosions at the National Ignition Facility using a Four-Shock Adiabat Shaped Drive journal September 2015
Theory of the Ablative Richtmyer-Meshkov Instability journal March 1999
Direct Observation of Mass Oscillations Due to Ablative Richtmyer-Meshkov Instability in Plastic Targets text January 2001

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Resolving hot spot microstructure using x-ray penumbral imaging (invited) journal August 2016
Experimental results of radiation-driven, layered deuterium-tritium implosions with adiabat-shaped drives at the National Ignition Facility journal October 2016
Improving ICF implosion performance with alternative capsule supports journal May 2017
Zonal flow generation in inertial confinement fusion implosions journal March 2017
Hydrodynamic instability growth of three-dimensional modulations in radiation-driven implosions with “low-foot” and “high-foot” drives at the National Ignition Facility journal April 2017
The potential of imposed magnetic fields for enhancing ignition probability and fusion energy yield in indirect-drive inertial confinement fusion journal June 2017
Hydro-instability growth of perturbation seeds from alternate capsule-support strategies in indirect-drive implosions on National Ignition Facility journal October 2017
Mitigation of X-ray shadow seeding of hydrodynamic instabilities on inertial confinement fusion capsules using a reduced diameter fuel fill-tube journal May 2018
Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes journal August 2018
Review of hydro-instability experiments with alternate capsule supports in indirect-drive implosions on the National Ignition Facility journal July 2018
Announcement: The 2018 Ronald C. Davidson Award for Plasma Physics journal May 2019
Indirect drive ignition at the National Ignition Facility journal October 2016
Capsule modeling of high foot implosion experiments on the National Ignition Facility journal March 2017
Beyond alpha-heating: driving inertially confined fusion implosions toward a burning-plasma state on the National Ignition Facility journal November 2018
Review of hydrodynamic instability experiments in inertially confined fusion implosions on National Ignition Facility journal October 2019
X-ray penumbral imaging diagnostic developments at the National Ignition Facility
  • Felker, Sean J.; Bachmann, Benjamin; Abu Shawareb, Hatim
  • Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI https://doi.org/10.1117/12.2274611
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