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Title: First hohlraum drive studies on the National Ignition Facility

Abstract

The first hohlraum experiments on the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Nucl. Fusion 44, 228 (2004)] 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:
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  1. LLNL, P.O. Box 808, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
20783163
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 13; Journal Issue: 5; Other Information: DOI: 10.1063/1.2178783; (c) 2006 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; COMPUTERIZED SIMULATION; ELECTRON TEMPERATURE; HARD X RADIATION; ICF DEVICES; ION TEMPERATURE; IRRADIATION; LASERS; LIGHT TRANSMISSION; PLASMA; PLASMA DIAGNOSTICS; PLASMA HEATING; PLASMA SIMULATION; PULSES; THERMONUCLEAR IGNITION; US NATIONAL IGNITION FACILITY; X-RAY SOURCES

Citation Formats

Dewald, E L, Landen, O L, Suter, L J, Schein, J, Holder, J, Campbell, K, Glenzer, S H, McDonald, J W, Niemann, C, Mackinnon, A J, Schneider, M S, Haynam, C, Hinkel, D, and Hammel, B A. First hohlraum drive studies on the National Ignition Facility. United States: N. p., 2006. Web. doi:10.1063/1.2178783.
Dewald, E L, Landen, O L, Suter, L J, Schein, J, Holder, J, Campbell, K, Glenzer, S H, McDonald, J W, Niemann, C, Mackinnon, A J, Schneider, M S, Haynam, C, Hinkel, D, & Hammel, B A. First hohlraum drive studies on the National Ignition Facility. United States. doi:10.1063/1.2178783.
Dewald, E L, Landen, O L, Suter, L J, Schein, J, Holder, J, Campbell, K, Glenzer, S H, McDonald, J W, Niemann, C, Mackinnon, A J, Schneider, M S, Haynam, C, Hinkel, D, and Hammel, B A. Mon . "First hohlraum drive studies on the National Ignition Facility". United States. doi:10.1063/1.2178783.
@article{osti_20783163,
title = {First hohlraum drive studies on the National Ignition Facility},
author = {Dewald, E L and Landen, O L and Suter, L J and Schein, J and Holder, J and Campbell, K and Glenzer, S H and McDonald, J W and Niemann, C and Mackinnon, A J and Schneider, M S and Haynam, C and Hinkel, D and Hammel, B A},
abstractNote = {The first hohlraum experiments on the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Nucl. Fusion 44, 228 (2004)] 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 = {5}
}