2005年12月
Study of fast electron transport in hot dense matter using x-ray spectroscopy
PLASMA PHYSICS AND CONTROLLED FUSION
- 巻
- 47
- 号
- 12 B
- 開始ページ
- B823
- 終了ページ
- B831
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/0741-3335/47/12B/S64
- 出版者・発行元
- IOP PUBLISHING LTD
Experimental study on energy transport in ultra-high intensity laser plasma was made. X-ray emission from a triple-layer target irradiated at 10(19) W cm(-2) was observed with x-ray spectrographs, monochromatic imagers and an x-ray polarimeter to provide a temperature profile in the depth of the target, lateral extension of the heated region and the velocity distribution function of hot electrons. For PW plasma, a very shallow region (similar to 0.5 mu m from the target surface) was heated up to 650 eV but the temperature of deeper region (up to 5 mu m) was around 100 eV. These depths are much shorter than those expected from the classical penetration of the hot electrons. The localized energy deposition is also found for the plasma generated at 10(17) W cm(-2), and the degree of polarization of the helium-like Cl-He mu line (1s(2 1)S(0)-ls2p P-1(1)) from the surface region is polarized parallel to the surface direction whereas that from a deeper region is in perpendicular to it. The experimental result is analysed using a two-dimensional Maxwellian distribution function for hot electrons. Beam-like distribution was found in the depth of plasma.
- リンク情報
- ID情報
-
- DOI : 10.1088/0741-3335/47/12B/S64
- ISSN : 0741-3335
- eISSN : 1361-6587
- Web of Science ID : WOS:000234420700066