Nonuniform discharge currents in active plasma lenses

被引：40

作者：

van Tilborg, J. ^{[1
]}

Barber, S. K. ^{[1
]}

Tsai, H-E. ^{[1
]}

Swanson, K. K. ^{[1
,2
]}

Steinke, S. ^{[1
]}

Geddes, C. G. R. ^{[1
]}

Gonsalves, A. J. ^{[1
]}

Schroeder, C. B. ^{[1
]}

Esarey, E. ^{[1
]}

Bulanov, S. S. ^{[1
]}

Bobrova, N. A. ^{[3
]}

Sasorov, P. V. ^{[3
]}

Leemans, W. P. ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Keldysh Inst Appl Math, Moscow 125047, Russia

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2017年 / 20卷 / 03期

基金：

美国国家科学基金会;

关键词：

Z-PINCH; ELECTRON-BEAMS;

D O I：

10.1103/PhysRevAccelBeams.20.032803

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：

Active plasma lenses have attracted interest in novel accelerator applications due to their ability to provide large-field-gradient (short focal length), tunable, and radially symmetric focusing for charged particle beams. However, if the discharge current is not flowing uniformly as a function of radius, one can expect a radially varying field gradient as well as potential emittance degradation. We have investigated this experimentally for a 1-mm-diameter active plasma lens. The measured near-axis field gradient is approximately 35% larger than expected for a uniform current distribution, and at overfocusing currents ring-shaped electron beams are observed. These observations are explained by simulations.

引用

页数：6

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