Laboratory Investigation of Whistler Wave Resonances and Wave-Particle Interactions*

Details Laboratory Investigation of Whistler Wave Resonances and Wave-Particle Interactions* Laboratory Investigation of Whistler Wave Resonances and Wave-Particle Interactions*

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm13b2087a&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM13B-2087

Physics

Plasma Physics

[7831] Space Plasma Physics / Laboratory Studies And Experimental Techniques, [7867] Space Plasma Physics / Wave/Particle Interactions

Scientific paper

Standing whistler wave patterns have been investigated in the Naval Research Laboratory's Space Physics Simulation Chamber. Partial reflection of the antenna-launched whistler waves from the chamber end boundaries sets up a combination of standing and traveling waves. By controlling the axial magnetic field strength profile, cyclotron absorption of the whistler waves can be induced before reflection occurs, leaving only the forward propagating waves. Under uniform axial magnetic field conditions, the addition of planar conducting grids across the vacuum chamber cross-section at the ends of the plasma column provides improved reflecting surfaces, improving the cavity Q. This experimental configuration is being used to investigate whistler wave-energetic electron interactions and pitch-angle scattering under simulated radiation belt plasma conditions. Electrons beams with controllable energy are produced by a hollow cathode source and introduced into the experimental region with selectable pitch angle. Experimental results from the whistler wave resonance and electron scattering experiments will be presented. *Work sponsored by the Office of Naval Research and the Defense Threat Reduction Agency.

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