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Title: Studies of ultra-intense laser plasma interactions for fast ignition

Abstract

Laser plasma interactions in a relativistic parameter regime have been intensively investigated for studying the possibility of fast ignition in inertial confinement fusion (ICF). Using ultra-intense laser systems and particle-in-cell (PIC) simulation codes, relativistic laser light self-focusing, super hot electrons, ions, and neutron production, are studied. The experiments are performed with ultra-intense laser with 50 J energy, 0.5-1 ps pulse at 1053 nm laser wavelength at a laser intensity of 10{sup 19} W/cm{sup 2}. Most of the laser shots are studied under preformed plasma conditions with a 100 {mu}m plasma scale length condition. In the study of laser pulse behavior in the preformed plasmas, a special mode has been observed which penetrated the preformed plasma all the way very close to the original planar target surface. On these shots, super hot electrons have been observed with its energy peak exceeding 1 MeV. The energy transport of the hot electrons has been studied with making use of K{alpha} emissions from a seeded metal layer in planar targets. The details of ion acceleration followed by beam fusion reaction have been studied with neutron spectrometers. Laser ponderomotive force self-focusing and hot electron generation have been applied to a compressed core to see themore » effect of heating by injecting 12 beams of 100 ps, 1 TW pulses. (c) 2000 American Institute of Physics.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871 Japan (Japan)
  2. Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871 Japan (Japan) (and others)
Publication Date:
OSTI Identifier:
20216066
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER-PRODUCED PLASMA; BEAM-PLASMA SYSTEMS; ICF DEVICES; INERTIAL CONFINEMENT; THERMONUCLEAR IGNITION; LASER-RADIATION HEATING; LASER FUSION REACTORS; NEUTRON SPECTROSCOPY; ENERGY SPECTRA; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Tanaka, K. A., Kodama, R., Fujita, H., Heya, M., Izumi, N., Kato, Y., Kitagawa, Y., Mima, K., Miyanaga, N., and Norimatsu, T. Studies of ultra-intense laser plasma interactions for fast ignition. United States: N. p., 2000. Web. doi:10.1063/1.874023.
Tanaka, K. A., Kodama, R., Fujita, H., Heya, M., Izumi, N., Kato, Y., Kitagawa, Y., Mima, K., Miyanaga, N., & Norimatsu, T. Studies of ultra-intense laser plasma interactions for fast ignition. United States. doi:10.1063/1.874023.
Tanaka, K. A., Kodama, R., Fujita, H., Heya, M., Izumi, N., Kato, Y., Kitagawa, Y., Mima, K., Miyanaga, N., and Norimatsu, T. Mon . "Studies of ultra-intense laser plasma interactions for fast ignition". United States. doi:10.1063/1.874023.
@article{osti_20216066,
title = {Studies of ultra-intense laser plasma interactions for fast ignition},
author = {Tanaka, K. A. and Kodama, R. and Fujita, H. and Heya, M. and Izumi, N. and Kato, Y. and Kitagawa, Y. and Mima, K. and Miyanaga, N. and Norimatsu, T.},
abstractNote = {Laser plasma interactions in a relativistic parameter regime have been intensively investigated for studying the possibility of fast ignition in inertial confinement fusion (ICF). Using ultra-intense laser systems and particle-in-cell (PIC) simulation codes, relativistic laser light self-focusing, super hot electrons, ions, and neutron production, are studied. The experiments are performed with ultra-intense laser with 50 J energy, 0.5-1 ps pulse at 1053 nm laser wavelength at a laser intensity of 10{sup 19} W/cm{sup 2}. Most of the laser shots are studied under preformed plasma conditions with a 100 {mu}m plasma scale length condition. In the study of laser pulse behavior in the preformed plasmas, a special mode has been observed which penetrated the preformed plasma all the way very close to the original planar target surface. On these shots, super hot electrons have been observed with its energy peak exceeding 1 MeV. The energy transport of the hot electrons has been studied with making use of K{alpha} emissions from a seeded metal layer in planar targets. The details of ion acceleration followed by beam fusion reaction have been studied with neutron spectrometers. Laser ponderomotive force self-focusing and hot electron generation have been applied to a compressed core to see the effect of heating by injecting 12 beams of 100 ps, 1 TW pulses. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874023},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}