Abstract
The distinction between the bounce-resonant and the velocity-resonant conditions involving electrostatically trapped particles and standing waves in plasma are clarified for the bounce-resonance Landau damping mechanism. Depending on the ratio between the turning-points' separation L for bouncing particles and the end-nodes' separation L' for standing waves in a square electrostatic well, damping can be possible by particles that are bounce resonant but not velocity resonant. The effect of non-coincident locations for the particle turning points and the wave nodes L ≠ L' is investigated. Also presented is the effect of a cut-off in the velocity distribution of the particles, above which no particles exist. It is shown that adjusting the particle turning points with respect to the wave nodes permits damping in the absence of velocity-resonant particles.
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