Supersonic jets of hydrogen and helium for laser wakefield acceleration

被引：2

作者：

Svensson, K. ^{[1
]}

Hansson, M. ^{[1
]}

Wojda, F. ^{[1
]}

Senje, L. ^{[1
]}

Burza, M. ^{[1
]}

Aurand, B. ^{[1
]}

Genoud, G. ^{[1
]}

Persson, A. ^{[1
]}

Wahlstrom, C. -G. ^{[1
]}

Lundh, O. ^{[1
]}

机构：

[1] Lund Univ, Dept Phys, POB 118, SE-22100 Lund, Sweden

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2016年 / 19卷 / 05期

基金：

瑞典研究理事会; 欧盟第七框架计划;

关键词：

PLASMA;

D O I：

10.1103/PhysRevAccelBeams.19.051301

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The properties of laser wakefield accelerated electrons in supersonic gas flows of hydrogen and helium are investigated. At identical backing pressure, we find that electron beams emerging from helium show large variations in their spectral and spatial distributions, whereas electron beams accelerated in hydrogen plasmas show a higher degree of reproducibility. In an experimental investigation of the relation between neutral gas density and backing pressure, it is found that the resulting number density for helium is similar to 30% higher than for hydrogen at the same backing pressure. The observed differences in electron beam properties between the two gases can thus be explained by differences in plasma electron density. This interpretation is verified by repeating the laser wakefield acceleration experiment using similar plasma electron densities for the two gases, which then yielded electron beams with similar properties.

引用

页数：5

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