The effect of high intensity laser propagation instabilities on channel formation in underdense plasmas

被引：59

作者：

Najmudin, Z

Krushelnick, K

Tatarakis, M

Clark, EL

Danson, CN

Malka, V

Neely, D

Santala, MIK

Dangor, AE

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

[2] AWE Plc, Dept Radiat Phys, Reading RG7 4PR, Berks, England

[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[4] Univ Paris 06, Lab Utilisat Lasers Intenses, Unite Mixte 7605, CNRS CEA,Ecole Polytech, Palaiseau, France

[5] Aalto Univ, Dept Engn Phys & Math, Espoo 02015, Finland

来源：

PHYSICS OF PLASMAS | 2003年 / 10卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.1534585

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：

Experiments have been performed using high power laser pulses (up to 50 TW) focused into underdense helium plasmas (n(e)less than or equal to5x10(19) cm(-3)). Using shadowgraphy, it is observed that the laser pulse can produce irregular density channels, which exhibit features such as long wavelength hosing and "sausage-like" self-focusing instabilities. This phenomenon is a high intensity effect and the characteristic period of oscillation of these instabilities is typically found to correspond to the time required for ions to move radially out of the region of highest intensity. (C) 2003 American Institute of Physics.

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页码：438 / 442

页数：5

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