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Title: Time-resolved, two-dimensional electron-temperature distribution of laser-imploded core plasmas

Abstract

We have developed a multichannel, multiimaging x-ray streak camera technique to measure two-dimensional electron-temperature distributions with a high temporal resolution by adding a multichannel spectrum selection capability to a multiimaging x-ray streak camera technique, and applied it to direct-drive implosion experiments with partially coherent light at Gekko-XII laser facility. It was found that electron-temperature distributions in the laser-imploded core plasmas of ICF targets had low-mode nonuniform structures changing with a temporal scale of 20 ps, and the abrupt drop of the electron temperature appeared in the deceleration phase. We have compared temporal profiles of the experimentally observed x-ray intensity and electron-temperature with those predicted by a one-dimensional hydrodynamic code {open_quotes}ILESTA{close_quotes} to investigate the hot spark heating in the core plasmas. {copyright} {ital 1997 American Institute of Physics.}

Authors:
; ; ; ; ; ; ;  [1]
  1. Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565 (Japan)
Publication Date:
OSTI Identifier:
451889
Report Number(s):
CONF-960543-
Journal ID: RSINAK; ISSN 0034-6748; TRN: 97:006247
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 68; Journal Issue: 1; Conference: 11. annual high-temperature plasma diagnostics conference, Monterey, CA (United States), 12-16 May 1996; Other Information: PBD: Jan 1997
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; DIRECT DRIVE LASER IMPLOSION; ELECTRON TEMPERATURE; PLASMA DIAGNOSTICS; TIME DEPENDENCE; EXPLOSIONS; GEKKO FACILITY; INERTIAL CONFINEMENT; LASER TARGETS; SPATIAL DISTRIBUTION; TIME RESOLUTION; X-RAY EQUIPMENT; STREAK CAMERAS; COMPUTERIZED SIMULATION; IMAGE PROCESSING; plasma inertial confinement; plasma temperature; X-ray imaging; plasma production by laser; fusion reactor ignition; fusion reactor fuel; plasma heating by laser

Citation Formats

Heya, M, Nakasuji, M, Shiraga, H, Miyanaga, N, Azechi, H, Takabe, H, Yamanaka, T, and Mima, K. Time-resolved, two-dimensional electron-temperature distribution of laser-imploded core plasmas. United States: N. p., 1997. Web. doi:10.1063/1.1147698.
Heya, M, Nakasuji, M, Shiraga, H, Miyanaga, N, Azechi, H, Takabe, H, Yamanaka, T, & Mima, K. Time-resolved, two-dimensional electron-temperature distribution of laser-imploded core plasmas. United States. https://doi.org/10.1063/1.1147698
Heya, M, Nakasuji, M, Shiraga, H, Miyanaga, N, Azechi, H, Takabe, H, Yamanaka, T, and Mima, K. Wed . "Time-resolved, two-dimensional electron-temperature distribution of laser-imploded core plasmas". United States. https://doi.org/10.1063/1.1147698.
@article{osti_451889,
title = {Time-resolved, two-dimensional electron-temperature distribution of laser-imploded core plasmas},
author = {Heya, M and Nakasuji, M and Shiraga, H and Miyanaga, N and Azechi, H and Takabe, H and Yamanaka, T and Mima, K},
abstractNote = {We have developed a multichannel, multiimaging x-ray streak camera technique to measure two-dimensional electron-temperature distributions with a high temporal resolution by adding a multichannel spectrum selection capability to a multiimaging x-ray streak camera technique, and applied it to direct-drive implosion experiments with partially coherent light at Gekko-XII laser facility. It was found that electron-temperature distributions in the laser-imploded core plasmas of ICF targets had low-mode nonuniform structures changing with a temporal scale of 20 ps, and the abrupt drop of the electron temperature appeared in the deceleration phase. We have compared temporal profiles of the experimentally observed x-ray intensity and electron-temperature with those predicted by a one-dimensional hydrodynamic code {open_quotes}ILESTA{close_quotes} to investigate the hot spark heating in the core plasmas. {copyright} {ital 1997 American Institute of Physics.}},
doi = {10.1063/1.1147698},
url = {https://www.osti.gov/biblio/451889}, journal = {Review of Scientific Instruments},
number = 1,
volume = 68,
place = {United States},
year = {1997},
month = {1}
}