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Title: High-density carbon ablator ignition path with low-density gas-filled rugby hohlraum

Abstract

A recent low gas-fill density (0.6 mg/cc {sup 4}He) cylindrical hohlraum experiment on the National Ignition Facility has shown high laser-coupling efficiency (>96%), reduced phenomenological laser drive corrections, and improved high-density carbon capsule implosion symmetry [Jones et al., Bull. Am. Phys. Soc. 59(15), 66 (2014)]. In this Letter, an ignition design using a large rugby-shaped hohlraum [Amendt et al., Phys. Plasmas 21, 112703 (2014)] for high energetics efficiency and symmetry control with the same low gas-fill density (0.6 mg/cc {sup 4}He) is developed as a potentially robust platform for demonstrating thermonuclear burn. The companion high-density carbon capsule for this hohlraum design is driven by an adiabat-shaped [Betti et al., Phys. Plasmas 9, 2277 (2002)] 4-shock drive profile for robust high gain (>10) 1-D ignition performance and large margin to 2-D perturbation growth.

Authors:
; ;  [1]
  1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
Publication Date:
OSTI Identifier:
22408283
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; CAPSULES; CARBON; CYLINDRICAL CONFIGURATION; DENSITY; DISTURBANCES; HELIUM 4; IMPLOSIONS; LASER CAVITIES; THERMONUCLEAR IGNITION; US NATIONAL IGNITION FACILITY

Citation Formats

Amendt, Peter, Ho, Darwin D., and Jones, Ogden S. High-density carbon ablator ignition path with low-density gas-filled rugby hohlraum. United States: N. p., 2015. Web. doi:10.1063/1.4918951.
Amendt, Peter, Ho, Darwin D., & Jones, Ogden S. High-density carbon ablator ignition path with low-density gas-filled rugby hohlraum. United States. https://doi.org/10.1063/1.4918951
Amendt, Peter, Ho, Darwin D., and Jones, Ogden S. 2015. "High-density carbon ablator ignition path with low-density gas-filled rugby hohlraum". United States. https://doi.org/10.1063/1.4918951.
@article{osti_22408283,
title = {High-density carbon ablator ignition path with low-density gas-filled rugby hohlraum},
author = {Amendt, Peter and Ho, Darwin D. and Jones, Ogden S.},
abstractNote = {A recent low gas-fill density (0.6 mg/cc {sup 4}He) cylindrical hohlraum experiment on the National Ignition Facility has shown high laser-coupling efficiency (>96%), reduced phenomenological laser drive corrections, and improved high-density carbon capsule implosion symmetry [Jones et al., Bull. Am. Phys. Soc. 59(15), 66 (2014)]. In this Letter, an ignition design using a large rugby-shaped hohlraum [Amendt et al., Phys. Plasmas 21, 112703 (2014)] for high energetics efficiency and symmetry control with the same low gas-fill density (0.6 mg/cc {sup 4}He) is developed as a potentially robust platform for demonstrating thermonuclear burn. The companion high-density carbon capsule for this hohlraum design is driven by an adiabat-shaped [Betti et al., Phys. Plasmas 9, 2277 (2002)] 4-shock drive profile for robust high gain (>10) 1-D ignition performance and large margin to 2-D perturbation growth.},
doi = {10.1063/1.4918951},
url = {https://www.osti.gov/biblio/22408283}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 22,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2015},
month = {Wed Apr 15 00:00:00 EDT 2015}
}

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