Generation of Whistler Wave by a Rotating Magnetic Field Source

Details Generation of Whistler Wave by a Rotating Magnetic Field Source Generation of Whistler Wave by a Rotating Magnetic Field Source

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm21a1663k&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM21A-1663

Physics

Plasma Physics

2471 Plasma Waves And Instabilities (2772), 2483 Wave/Particle Interactions (7867), 2487 Wave Propagation (0689, 3285, 4275, 4455, 6934)

Scientific paper

The interaction of Rotating Magnetic Fields (RMF) with plasmas is a fundamental plasma physics problem with implications to fusion related Field-Reversed Configurations (FRC), space propulsion, astronaut protection from cosmic rays in long interstellar travel, control of the energetic population in the radiation belts and near zone processes in pulsar magnetospheres. In this paper we report recent experiments on the generation of whistler waves with a new type RMF-based antenna. The experiments were conducted on UCLA's Large Plasma Device (LAPD). The Rotating Magnetic Field (RMF) is created using poly-phased loop antennas. A number of parameter combinations, e.g. plasma density, background magnetic field, and driving current, were used. It was found that RMF created by a two phase-delayed loop antenna drives significant currents along the ambient magnetic field. The measured amplitude of induced wave field was proportional to the square-root of the plasma density. The spatial decay rate for the wave perturbation across the background magnetic field was found to scale with the plasma skin depth. A small amplitude second harmonic was also measured. The paper will also present analytic and simulation results that account for the experimental results; in particular, the scaling of the induced magnetic field as a function of the RMF and plasma parameters and the spatial decay rate of magnetic field. Applications of RMF as an efficient radiation source of plasma waves in space plasmas will be discussed. This work was sponsored by ONR MURI Grant 5-28828

Affiliated with

Also associated with

No associations

Rating

Generation of Whistler Wave by a Rotating Magnetic Field Source does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Generation of Whistler Wave by a Rotating Magnetic Field Source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generation of Whistler Wave by a Rotating Magnetic Field Source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1093901