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Titolo:
Observation of proton rear emission and possible gigagauss scale magnetic fields from ultra-intense laser illuminated plastic target
Autore:
Murakami, Y; Kitagawa, Y; Sentoku, Y; Mori, M; Kodama, R; Tanaka, KA; Mima, K; Yamanaka, T;
Indirizzi:
Osaka Univ, Inst Laser Engn, Osaka 5650871, Japan Osaka Univ Osaka Japan5650871 iv, Inst Laser Engn, Osaka 5650871, Japan
Titolo Testata:
PHYSICS OF PLASMAS
fascicolo: 9, volume: 8, anno: 2001,
pagine: 4138 - 4143
SICI:
1070-664X(200109)8:9<4138:OOPREA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLID TARGETS; PLASMA; ELECTRON; ACCELERATION; OVERDENSE; PULSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Murakami, Y Osaka Univ, Inst Laser Engn, Osaka 5650871, Japan Osaka Univ Osaka Japan 5650871 er Engn, Osaka 5650871, Japan
Citazione:
Y. Murakami et al., "Observation of proton rear emission and possible gigagauss scale magnetic fields from ultra-intense laser illuminated plastic target", PHYS PLASMA, 8(9), 2001, pp. 4138-4143

Abstract

CR-39 film stacks are used to measure the energy and angular distribution of protons emitted from the rear surface of ultra-intense laser illuminatedplastic foils. The experiment suggests that the energetic protons are dragged away from the rear surface, where the hot electron formed a virtual cathode. The two-dimensional particle in cell simulation supports this hypothesis. For 5 (100) mum thick target, 1.8 x 10(9) protons have a slope temperature of 3 (2) MeV. The ring structure of proton emission leads us to the hypothesis that a toroidal magnetic field associated with the hot electrons works on the fast ions and deflects them. From the logarithmic slope of the ring diameter versus the ion energy, the product of the magnetic field x the length over which it works on the ions is estimated to be up to 1000 MG.mum. The simulation shows that a strong toroidal magnetic field was excited at the target rear side with expansion of plasmas. The proton's angular distribution from the rear surface has the logarithmic slope similar to the experimental results due to this magnetic field. (C) 2001 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 19:03:46