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Drift-Wave Eigenmodes and Spectral Gaps in Tandem Mirrors

J. Pratt, H. L. Berk, W. Horton

Fusion Science and Technology / Volume 55 / Number 2T / February 2009 / Pages 25-29

Technical Paper / Seventh International Conference on Open Magnetic Systems for Plasma Confinement /

In recent years, breakthroughs in the GAMMA-10 tandem mirror device and new designs such as the Kinetically Stabilized Tandem Mirror have renewed enthusiasm for investigation of mirror plasmas. With a discrete eigenmode solver and shooting code we calculate kinetic Alfvén waves in a model GAMMA-10 experiment, and then examine the nature of the spectral gaps. We validate the results of these calculations by comparing with magnetic probe signals recorded in the LAPD as a function of frequency of the antenna and the axial position.

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