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Title: Observation of an Alfvén Wave Parametric Instability in a Laboratory Plasma

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1252596
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 19; Related Information: CHORUS Timestamp: 2016-05-11 18:10:31; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Dorfman, S., and Carter, T. A. Observation of an Alfvén Wave Parametric Instability in a Laboratory Plasma. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.116.195002.
Dorfman, S., & Carter, T. A. Observation of an Alfvén Wave Parametric Instability in a Laboratory Plasma. United States. doi:10.1103/PhysRevLett.116.195002.
Dorfman, S., and Carter, T. A. Wed . "Observation of an Alfvén Wave Parametric Instability in a Laboratory Plasma". United States. doi:10.1103/PhysRevLett.116.195002.
@article{osti_1252596,
title = {Observation of an Alfvén Wave Parametric Instability in a Laboratory Plasma},
author = {Dorfman, S. and Carter, T. A.},
abstractNote = {},
doi = {10.1103/PhysRevLett.116.195002},
journal = {Physical Review Letters},
number = 19,
volume = 116,
place = {United States},
year = {Wed May 11 00:00:00 EDT 2016},
month = {Wed May 11 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.116.195002

Citation Metrics:
Cited by: 1work
Citation information provided by
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  • Parametric decays of a left-handed circularly polarized Alfvén wave propagating along a constant background magnetic field in a relativistic thermal electron-positron plasma are studied by means of a one dimensional relativistic particle-in-cell simulation. Relativistic effects are included in the Lorentz equation for the momentum of the particles and in their thermal motion, by considering a Maxwell-Jüttner velocity distribution function for the initial condition. In the linear stage of the simulation, we find many instabilities that match the predictions of relativistic fluid theory. In general, the growth rates of the instabilities increase as the pump wave amplitude is increased, and decreasemore » with a raise in the plasma temperatures. We have confirmed that for very high temperatures the Alfvén branch is suppressed, consistent with analytical calculations.« less
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  • Turbulence is a phenomenon found throughout space and astrophysical plasmas. It plays an important role in solar coronal heating, acceleration of the solar wind, and heating of the interstellar medium. Turbulence in these regimes is dominated by Alfvén waves. Most turbulence theories have been established using ideal plasma models, such as incompressible MHD. However, there has been no experimental evidence to support the use of such models for weakly to moderately collisional plasmas which are relevant to various space and astrophysical plasma environments. We present the first experiment to measure the nonlinear interaction between two counterpropagating Alfvén waves, which ismore » the building block for astrophysical turbulence theories. We present here four distinct tests that demonstrate conclusively that we have indeed measured the daughter Alfvén wave generated nonlinearly by a collision between counterpropagating Alfvén waves.« less