Observations of a field-aligned ion/ion-beam instability in a magnetized laboratory plasma

被引：21

作者：

Heuer, P. V. ^{[1
]}

Weidl, M. S. ^{[1
]}

Dorst, R. S. ^{[1
]}

Schaeffer, D. B. ^{[1
,3
]}

Bondarenko, A. S. ^{[1
]}

Tripathi, S. K. P. ^{[1
]}

Van Compernolle, B. ^{[1
]}

Vincena, S. ^{[1
]}

Constantin, C. G. ^{[1
]}

Niemann, C. ^{[1
]}

Winske, D. ^{[2
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[3] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08540 USA

来源：

PHYSICS OF PLASMAS | 2018年 / 25卷 / 03期

基金：

美国国家科学基金会;

关键词：

ELECTROMAGNETIC INSTABILITIES; COLLISIONLESS SHOCKS; MACH-NUMBER; PARALLEL; IONS; ACCELERATION; SIMULATION; DRIVEN; SPACE;

D O I：

10.1063/1.5017637

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：

Collisionless coupling between super Alfvenic ions and an ambient plasma parallel to a background magnetic field is mediated by a set of electromagnetic ion/ion-beam instabilities including the resonant right hand instability (RHI). To study this coupling and its role in parallel shock formation, a new experimental configuration at the University of California, Los Angeles utilizes high-energy and high-repetition-rate lasers to create a super-Alfvenic field-aligned debris plasma within an ambient plasma in the Large Plasma Device. We used a time-resolved fluorescence monochromator and an array of Langmuir probes to characterize the laser plasma velocity distribution and density. The debris ions were observed to be sufficiently super-Alfvenic and dense to excite the RHI. Measurements with magnetic flux probes exhibited a right-hand circularly polarized frequency chirp consistent with the excitation of the RHI near the laser target. We compared measurements to 2D hybrid simulations of the experiment. Published by AIP Publishing.

引用

页数：10

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