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  • Presentation | SH21A: Fundamental Mechanisms in Highly Collisionless Plasmas: Wave-Particle Interactions, Turbulence, Structures, and Instabilities with Applications to Heliospheric, Magnetospheric, and Laboratory Plasma Physics I Oral
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  • SH21A-08: Excitation of whistler-mode waves by an electron temperature anisotropy in a laboratory plasma
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Author(s):
Donglai Ma, University of California Los Angeles (First Author, Presenting Author)
Xin An, University of California Los Angeles
Jia Han, University of California, Los Angeles
Shreekrishna Tripathi, University of California Los Angeles
Jacob Bortnik, University of California Los Angeles
Anton Artemyev, University of California Los Angeles
Vassilis Angelopoulos, University of California Los Angeles
Walter Gekelman, UCLA
Patrick Pribyl, University of California Los Angeles


Whistler-mode waves govern energetic electron dynamics across diverse plasma systems, while these electrons simultaneously drive wave excitation through velocity-space micro-instabilities. Our stable, reproducible experiments demonstrate controlled whistler-mode wave excitation via temperature anisotropy instabilities. These waves exhibit periodic excitation patterns analogous to natural whistler emissions in space, revealing a repetitive cycle of wave emission and electron anisotropy buildup-relaxation in both magnetospheric and laboratory driven systems. Our experiments create a new avenue to investigate whistler wave excitation mechanisms highly relevant to near-Earth space, enhancing our understanding of energetic electron behavior and associated space weather phenomena.



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