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This content will become publicly available on March 1, 2019

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

Collisionless coupling between super Alfvénic 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-Alfvénic 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-Alfvénic 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. To conclude, we compared measurements to 2D hybrid simulations of the experiment.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [1] ;  [2] ;  [1] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1] ;  [3]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy; Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Grant/Contract Number:
SC0006538; HDTRA1-12-1-0024; SC0006538:0003; SC0017900; 1414591; FC02-07ER54918; PHY-1561912
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 3; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of California, Los Angeles, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE; USDOD, Defense Threat Reduction Agency (DTRA); National Science Foundation (NSF); Space and Naval Warfare Systems Command (SPAWAR)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS; Beam instability; parallel shock; plasma waves; Shock waves; Nonlinear acoustics; Spectroscopy; Time resolved spectroscopy; Lasers; Particle beam optics; Chemical analysis; Optical metrology; Hydrodynamic waves; Plasma devices
OSTI Identifier:
1429109
Alternate Identifier(s):
OSTI ID: 1423402