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

  • Joshua J Larson

    • University of California, Los Angeles

Authors

  • Joshua J Larson

    • University of California, Los Angeles

  • Troy A Carter

    • University of California, Los Angeles

  • Gurleen Bal

    • University of California, Los Angeles

  • Bart G Van Compernolle

    • General Atomics - San Diego