Interaction between high power ICRF waves and turbulence in LAPD
POSTER
Abstract
Experiments studying high power ion cyclotron range of frequencies (ICRF) wave excitation have been carried out in the Large Plasma Device (LAPD) at UCLA. Fast waves are excited using a single-strap antenna, driven by a high power (100kW) amplifier at ~2.5 MHz (~5 fci). During high power wave excitation, modification of edge turbulence is observed with edge density fluctuations (in the 1-100kHz frequency range) increasing with increasing ICRF power. This work investigates the possible mechanisms for this increase, including profile modification (increased density or flow gradients) and nonlinear three-wave processes.
Presenters
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Joshua J Larson
University of California, Los Angeles
Authors
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Joshua J Larson
University of California, Los Angeles
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Troy A Carter
University of California, Los Angeles
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Gurleen Bal
University of California, Los Angeles
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Bart G Van Compernolle
General Atomics - San Diego