Reentrant cone angle dependence of the energetic electron slope temperature in high-intensity laser-plasma interactions

被引：16
|
作者：
Nakatsutsumi, M.
Kodama, R.
Norreys, P. A.
Awano, S.
Nakamura, H.
Norimatsu, T.
Ooya, A.
Tampo, M.
Tanaka, K. A.
Tanimoto, T.
Tsutsumi, T.
Yabuuchi, T.
机构：
[1] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan
[2] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan
[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
来源：
PHYSICS OF PLASMAS | 2007年 / 14卷 / 05期
基金：
日本科学技术振兴机构;
关键词：
D O I：
10.1063/1.2730490
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Energy spectra of fast electrons, generated when high-intensity laser pulses irradiated hollow conical targets, have been measured experimentally. It is shown here that the slope temperature of the fast electrons is strongly dependent on the opening angle of the cone, and has a maximum value at 25 degrees. The data confirms optical guiding of the laser pulse, by comparison of the measured electron temperature with ray-tracing calculations that include absorption in plasmas. The enhanced energy flow and intensity induced by optical guiding of the laser pulse inside the cone as a function of the opening angle as well as the f-number of the focusing optics is discussed. (C) 2007 American Institute of Physics.
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页数：4
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