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Title: First Laser-Plasma Interaction and Hohlraum Experiments on NIF

Abstract

Recently the first hohlraum experiments have been performed at the National Ignition Facility (NIF) in support of indirect drive Inertial Confinement Fusion (ICF) designs. The effects of laser beam smoothing by spectral dispersion (SSD) and polarization smoothing (PS) on the beam propagation in long scale gas-filled pipes has been studied at plasma scales as found in indirect drive gas filled ignition hohlraum designs. The long scale gas-filled target experiments have shown propagation over 7 mm of dense plasma without filamentation and beam break up when using full laser smoothing. Vacuum hohlraums have been irradiated with laser powers up to 6 TW, 1-9 ns pulse lengths and energies up to 17 kJ to activate several diagnostics, to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed at the NOVA and Omega laser facilities. Subsequently, novel long laser pulse hohlraum experiments have tested models of hohlraum plasma filling and long pulse hohlraum radiation production. The validity of the plasma filling assessment in analytical models and in LASNEX calculations has been proven for the first time. The comparison of these results with modeling will be discussed.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
877908
Report Number(s):
UCRL-CONF-214524
TRN: US0601671
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 32nd EPS Conference on Plasma Physics, Tarragona, Spain, Jun 26 - Jul 01, 2005
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 42 ENGINEERING; IGNITION; INERTIAL CONFINEMENT; LASERS; PHYSICS; PLASMA; POLARIZATION; PRODUCTION; RADIATIONS; SIMULATION; TARGETS; US NATIONAL IGNITION FACILITY

Citation Formats

Dewald, E L, Glenzer, S H, Landen, O L, Suter, L J, Jones, O S, Schein, J, Froula, D, Divol, L, Campbell, K, Schneider, M S, McDonald, J W, Niemann, C, and Mackinnon, A J. First Laser-Plasma Interaction and Hohlraum Experiments on NIF. United States: N. p., 2005. Web.
Dewald, E L, Glenzer, S H, Landen, O L, Suter, L J, Jones, O S, Schein, J, Froula, D, Divol, L, Campbell, K, Schneider, M S, McDonald, J W, Niemann, C, & Mackinnon, A J. First Laser-Plasma Interaction and Hohlraum Experiments on NIF. United States.
Dewald, E L, Glenzer, S H, Landen, O L, Suter, L J, Jones, O S, Schein, J, Froula, D, Divol, L, Campbell, K, Schneider, M S, McDonald, J W, Niemann, C, and Mackinnon, A J. Fri . "First Laser-Plasma Interaction and Hohlraum Experiments on NIF". United States. https://www.osti.gov/servlets/purl/877908.
@article{osti_877908,
title = {First Laser-Plasma Interaction and Hohlraum Experiments on NIF},
author = {Dewald, E L and Glenzer, S H and Landen, O L and Suter, L J and Jones, O S and Schein, J and Froula, D and Divol, L and Campbell, K and Schneider, M S and McDonald, J W and Niemann, C and Mackinnon, A J},
abstractNote = {Recently the first hohlraum experiments have been performed at the National Ignition Facility (NIF) in support of indirect drive Inertial Confinement Fusion (ICF) designs. The effects of laser beam smoothing by spectral dispersion (SSD) and polarization smoothing (PS) on the beam propagation in long scale gas-filled pipes has been studied at plasma scales as found in indirect drive gas filled ignition hohlraum designs. The long scale gas-filled target experiments have shown propagation over 7 mm of dense plasma without filamentation and beam break up when using full laser smoothing. Vacuum hohlraums have been irradiated with laser powers up to 6 TW, 1-9 ns pulse lengths and energies up to 17 kJ to activate several diagnostics, to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed at the NOVA and Omega laser facilities. Subsequently, novel long laser pulse hohlraum experiments have tested models of hohlraum plasma filling and long pulse hohlraum radiation production. The validity of the plasma filling assessment in analytical models and in LASNEX calculations has been proven for the first time. The comparison of these results with modeling will be discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {6}
}

Conference:
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