Electrostatic ion cyclotron wave fields are determined in a magnetized and weakly collisional plasma. A phased‐locked Laser Induced Fluorescence (LIF) diagnostic is used to directly measure the wave perturbed ion velocity distribution. Comparing these local LIF measurements with a theoretical model uniquely determines the wave parameters, such as the wave potential, the three‐dimensional wave vector, and the effective wave damping. The self‐consistent wave–particle interaction is modeled by Boltzmann–Poisson equations in the limit of weak collisions. The wave parameters determined from local measurements agree with those determined from spatial scans.

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© 1996 American Institute of Physics.
1996
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