Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Time- and space-resolved X-ray spectroscopy for observation of the hot compressed core region in a laser driven implosion
Autore:
Ochi, Y; Fujita, K; Niki, I; Nishimura, H; Izumi, N; Sunahara, A; Naruo, S; Kawamura, T; Fukao, M; Shiraga, H; Takabe, H; Mima, K; Nakai, S; Uschmann, I; Butzbach, R; Forster, E;
Indirizzi:
Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan Osaka Univ SuitaOsaka Japan 5650871 er Engn, Suita, Osaka 5650871, Japan Osaka Univ, Dept Electromagnet Energy Engn, Suita, Osaka 5650871, Japan Osaka Univ Suita Osaka Japan 5650871 gy Engn, Suita, Osaka 5650871, Japan Univ Jena, Inst Opt & Quantumelect, Xray Opt Grp, D-07743 Jena, Germany Univ Jena Jena Germany D-07743 lect, Xray Opt Grp, D-07743 Jena, Germany
Titolo Testata:
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
fascicolo: 1-3, volume: 65, anno: 2000,
pagine: 393 - 404
SICI:
0022-4073(200004/05)65:1-3<393:TASXSF>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
GEKKO-XII LASER; ALUMINUM PLASMA; INSTABILITY; DENSITY; FUSION; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Ochi, Y Osaka Univ, Inst Laser Engn, 2-6 Yamadaoka, Suita, Osaka 5650871, Japan Osaka Univ 2-6 Yamadaoka Suita Osaka Japan 5650871 5650871, Japan
Citazione:
Y. Ochi et al., "Time- and space-resolved X-ray spectroscopy for observation of the hot compressed core region in a laser driven implosion", J QUAN SPEC, 65(1-3), 2000, pp. 393-404

Abstract

Fusion pellet implosion by direct laser irradiation was investigated by means of time- and space-resolved X-ray spectroscopic measurements. Fusion pellets filled with a deuterium fuel gas including a small amount of Ar dopant were irradiated with 12 beams of intense partially coherent light and line emissions from the dopant were observed. There were two type of implosionstudies. First, experimental conditions were carefully chosen to provide implosions that were as stable as possible, these we refer to as the "balanced" cases. Second, the energy balance was manipulated so that two specific beams, diametrically opposed to each other, had relatively large energy differences. This imposes additional low-modal non-uniformity on the pellet! and these experiments are called that the "unbalanced" cases. Experimental results were compared with hydrocode simulations, which were post-processed by the aid of X-ray spectrum analysis code. The experimental results in terms of temporal variations of the Ar He-beta line and their spatial profilesobtained with an X-ray monochromatic imager were well replicated by one-dimensional (1-D) simulation for the balanced case, whereas those for the unbalanced case showed large discrepancies. Furthermore, a clear difference was found in the emission of Li-like satellite lines between two cases: In the unbalanced case, the satellite lines became much more intense than the He-beta line at late time in the implosion. These experimental results suggest that the imposed low-modal non-uniformities assisted in the quenching of hot, compressed core formation. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 09:42:24