Physics of giant electromagnetic pulse generation in short-pulse laser experiments

被引：108

作者：

Poye, A. ^{[1
]}

Hulin, S. ^{[1
]}

Bailly-Grandvaux, M. ^{[1
]}

Dubois, J. -L. ^{[2
]}

Ribolzi, J. ^{[2
]}

Raffestin, D. ^{[2
]}

Bardon, M. ^{[2
]}

Lubrano-Lavaderci, F. ^{[2
]}

D'Humieres, E.

Santos, J. J. ^{[1
]}

Nicolai, Ph. ^{[1
]}

Tikhonchuk, V. ^{[1
]}

机构：

[1] Univ Bordeaux, CEA, CNRS, Ctr Lasers Intenses & Applicat, F-33405 Talence, France

[2] CESTA, CEA, DAM, F-33405 Le Barp, France

来源：

PHYSICAL REVIEW E | 2015年 / 91卷 / 04期

关键词：

PLASMAS; DRIVEN; POWER;

D O I：

10.1103/PhysRevE.91.043106

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：

In this paper we describe the physical processes that lead to the generation of giant electromagnetic pulses (GEMPs) at powerful laser facilities. Our study is based on experimental measurements of both the charging of a solid target irradiated by an ultra-short, ultra-intense laser and the detection of the electromagnetic emission in the GHz domain. An unambiguous correlation between the neutralization current in the target holder and the electromagnetic emission shows that the source of the GEMP is the remaining positive charge inside the target after the escape of fast electrons accelerated by the ultra-intense laser. A simple model for calculating this charge in the thick target case is presented. From this model and knowing the geometry of the target holder, it becomes possible to estimate the intensity and the dominant frequencies of the GEMP at any facility.

引用

页数：6

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Raffestin, D.
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