Measurements of laser-hole boring into overdense plasmas using x-ray laser refractometry (invited)

被引：10

作者：

Kodama, R ^{[1
]}

Takahashi, K

Tanaka, KA

Kato, Y

Murai, K

Weber, F

Barbee, TW

DaSilva, LB

机构：

[1] Osaka Univ, Inst Laser Engn, Suita, Osaka 565, Japan

[2] Osaka Natl Res Inst, DMP, Ikeda, Osaka 563, Japan

[3] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1999年 / 70卷 / 01期

关键词：

D O I：

10.1063/1.1149380

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We developed a 19.6 nm laser x-ray laser grid-image refractometer (XRL-GIR) to diagnose laser-hole boring into overdense plasmas. The XRL-GIR was optimized to measure two-dimensional electron density perturbation on a scale of a few tens of mu m in underdense plasmas. Electron density profiles of laser-produced plasmas were obtained for 10(20)-10(22) cm(-3) with the XRL-GIR and for 10(19)-10(20) cm(-3) from an ultraviolet interferometer, the profiles of which were compared with those from hydrodynamic simulation. By using this XRL-GIR, we directly observed laser channeling into overdense plasmas accompanied by a bow shock wave showing a Mach cone ascribed to supersonic propagation of the channel front. (C) 1999 American Institute of Physics. [S0034-6748(99)61901-3].

引用

页码：543 / 548

页数：6

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