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Title: First Hohlraum Drives Studies on the National Ignition Facility

Abstract

The first hohlraum experiments on the National Ignition Facility (NIF) using the first four laser beams have activated the indirect-drive experimental capabilities and tested radiation temperature limits imposed by hohlraum plasma filling. Vacuum hohlraums have been irradiated with laser powers up to 9 TW, 1 to 9 ns long square pulses and energies of up to 17 kJ to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed previously at other laser facilities. Furthermore, for a variety of hohlraum sizes and pulse lengths, the measured x-ray flux shows signatures of plasma filling that coincide with hard x-ray emission from plasma streaming out of the hohlraum. These observations agree with hydrodynamic simulations and with analytical modeling that includes hydrodynamic and coronal radiative losses. The modeling predicts radiation temperature limits on full NIF (1.8 MJ) that are significantly greater than required for ignition hohlraums.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
959461
Report Number(s):
BNL-82447-2009-JA
Journal ID: ISSN 1070-664X; PHPAEN; TRN: US1005745
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 13; Journal Issue: 5; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HYDRODYNAMICS; IGNITION; LASERS; PLASMA; RADIATIONS; SIMULATION; US NATIONAL IGNITION FACILITY; national synchrotron light source

Citation Formats

Dewald, E, Landen, O, Suter, L, and et al. First Hohlraum Drives Studies on the National Ignition Facility. United States: N. p., 2006. Web. doi:10.1063/1.2178783.
Dewald, E, Landen, O, Suter, L, & et al. First Hohlraum Drives Studies on the National Ignition Facility. United States. doi:10.1063/1.2178783.
Dewald, E, Landen, O, Suter, L, and et al. Sun . "First Hohlraum Drives Studies on the National Ignition Facility". United States. doi:10.1063/1.2178783.
@article{osti_959461,
title = {First Hohlraum Drives Studies on the National Ignition Facility},
author = {Dewald, E and Landen, O and Suter, L and et al},
abstractNote = {The first hohlraum experiments on the National Ignition Facility (NIF) using the first four laser beams have activated the indirect-drive experimental capabilities and tested radiation temperature limits imposed by hohlraum plasma filling. Vacuum hohlraums have been irradiated with laser powers up to 9 TW, 1 to 9 ns long square pulses and energies of up to 17 kJ to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed previously at other laser facilities. Furthermore, for a variety of hohlraum sizes and pulse lengths, the measured x-ray flux shows signatures of plasma filling that coincide with hard x-ray emission from plasma streaming out of the hohlraum. These observations agree with hydrodynamic simulations and with analytical modeling that includes hydrodynamic and coronal radiative losses. The modeling predicts radiation temperature limits on full NIF (1.8 MJ) that are significantly greater than required for ignition hohlraums.},
doi = {10.1063/1.2178783},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 13,
place = {United States},
year = {2006},
month = {1}
}