title: Excitation of shear Alfvén waves by a spiraling ion beam in a large magnetoplasma.
abstract: Generation of shear Alfvén waves by the Doppler-shifted ion-cyclotron-resonance (DICR) of a spiraling H(+) ion beam with magnetic fluctuations in a dual-species magnetized plasma with He(+) and H(+) ions has been investigated on the Large Plasma Device. The ambient plasma density and electron temperature were significantly enhanced by the beam. The Alfvén waves were left-handed polarized and traveled in the direction opposite to the ion beam. This is the first experimental demonstration of the DICR excitation of traveling shear Alfvén waves in a laboratory magnetoplasma.
authors: Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095.
authors: S K P
authors: SK
authors: Tripathi
authors: Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095.
authors: B
authors: B
authors: Van Compernolle
authors: Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095.
authors: W
authors: W
authors: Gekelman
authors: Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095.
authors: P
authors: P
authors: Pribyl
authors: Physics and Astronomy, University of California at Irvine, Irvine, California 92697.
authors: W
authors: W
authors: Heidbrink