On the stability of laser wakefield electron accelerators in the monoenergetic regime

被引：70

作者：

Mangles, S. P. D.

Thomas, A. G. R.

Lundh, O.

Lindau, F.

Kaluza, M. C.

Persson, A.

Wahlstrom, C.-G.

Krushelnick, K.

Najmudin, Z.

机构：

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

[2] Lund Univ, Dept Phys, S-22100 Lund, Sweden

来源：

PHYSICS OF PLASMAS | 2007年 / 14卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.2436481

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：

The effects of plasma density and laser energy on the stability of laser produced monoenergetic electron beams are investigated. Fluctuations in the principal beam parameters, namely, electron energy, energy-spread, charge, and pointing, are demonstrated to be minimized at low densities. This improvement in stability is attributed to the reduced time for pulse evolution required before self-injection occurs; i.e., that the pulse is closest to the matched conditions for these densities. It is also observed that electrons are only consistently produced above a density-dependent energy threshold. These observations are consistent with there being a threshold intensity (a(0)greater than or similar to 3) required for the occurrence of self-injection after accounting for pulse compression. (C) 2007 American Institute of Physics.

引用

页数：7

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