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Title: Rugby-like hohlraum experimental designs for demonstrating x-ray drive enhancement

Abstract

A suite of experimental designs for the Omega laser facility [Boehly et al., Opt. Commun. 133, 495 (1997)] using rugby and cylindrical hohlraums is proposed to confirm the energetics benefits of rugby-shaped hohlraums over cylinders under optimal implosion symmetry conditions. Postprocessed Dante x-ray drive measurements predict a 12-17 eV (23%-36%) peak hohlraum temperature (x-ray flux) enhancement for a 1 ns flattop laser drive history. Simulated core self-emission x-ray histories also show earlier implosion times by 200-400 ps, depending on the hohlraum case-to-capsule ratio and laser-entrance-hole size. Capsules filled with 10 or 50 atm of deuterium (DD) are predicted to give in excess of 10{sup 10} neutrons in two-dimensional hohlraum simulations in the absence of mix, enabling DD burn history measurements for the first time in indirect-drive on Omega. Capsule designs with 50 atm of D{sup 3}He are also proposed to make use of proton slowing for independently verifying the drive benefits of rugby hohlraums. Scale-5/4 hohlraum designs are also introduced to provide further margin to potential laser-plasma-induced backscatter and hot-electron production.

Authors:
; ; ; ; ;  [1]
  1. Lawrence Livermore National Laboratory, University of California, Livermore, California 94551 (United States)
Publication Date:
OSTI Identifier:
21069969
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 15; Journal Issue: 1; Other Information: DOI: 10.1063/1.2825662; (c) 2008 American Institute of Physics; 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; CAPSULES; DESIGN; DEUTERIUM; ELECTRON TEMPERATURE; ELECTRONS; ICF DEVICES; INERTIAL CONFINEMENT; ION TEMPERATURE; LASER IMPLOSIONS; LASERS; NEUTRONS; OMEGA FACILITY; PLASMA; PLASMA PRODUCTION; PLASMA SIMULATION; PROTONS; X RADIATION

Citation Formats

Amendt, Peter, Cerjan, C, Hinkel, D E, Milovich, J L, Park, H -S, and Robey, H F. Rugby-like hohlraum experimental designs for demonstrating x-ray drive enhancement. United States: N. p., 2008. Web. doi:10.1063/1.2825662.
Amendt, Peter, Cerjan, C, Hinkel, D E, Milovich, J L, Park, H -S, & Robey, H F. Rugby-like hohlraum experimental designs for demonstrating x-ray drive enhancement. United States. doi:10.1063/1.2825662.
Amendt, Peter, Cerjan, C, Hinkel, D E, Milovich, J L, Park, H -S, and Robey, H F. Tue . "Rugby-like hohlraum experimental designs for demonstrating x-ray drive enhancement". United States. doi:10.1063/1.2825662.
@article{osti_21069969,
title = {Rugby-like hohlraum experimental designs for demonstrating x-ray drive enhancement},
author = {Amendt, Peter and Cerjan, C and Hinkel, D E and Milovich, J L and Park, H -S and Robey, H F},
abstractNote = {A suite of experimental designs for the Omega laser facility [Boehly et al., Opt. Commun. 133, 495 (1997)] using rugby and cylindrical hohlraums is proposed to confirm the energetics benefits of rugby-shaped hohlraums over cylinders under optimal implosion symmetry conditions. Postprocessed Dante x-ray drive measurements predict a 12-17 eV (23%-36%) peak hohlraum temperature (x-ray flux) enhancement for a 1 ns flattop laser drive history. Simulated core self-emission x-ray histories also show earlier implosion times by 200-400 ps, depending on the hohlraum case-to-capsule ratio and laser-entrance-hole size. Capsules filled with 10 or 50 atm of deuterium (DD) are predicted to give in excess of 10{sup 10} neutrons in two-dimensional hohlraum simulations in the absence of mix, enabling DD burn history measurements for the first time in indirect-drive on Omega. Capsule designs with 50 atm of D{sup 3}He are also proposed to make use of proton slowing for independently verifying the drive benefits of rugby hohlraums. Scale-5/4 hohlraum designs are also introduced to provide further margin to potential laser-plasma-induced backscatter and hot-electron production.},
doi = {10.1063/1.2825662},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 1,
volume = 15,
place = {United States},
year = {2008},
month = {1}
}