title: Damping of the trapped-particle diocotron mode.
abstract: The damping mechanism of a recently discovered trapped-particle mode is identified as collisional velocity scattering of marginally trapped particles. The mode exists on non-neutral plasma columns that are partially divided by an electrostatic potential. This damping mechanism is similar to that responsible for damping of the dissipative trapped-ion mode. The damping rate is calculated using a Fokker-Planck analysis and agrees with measurement to within 50%. Also, an experimental signature confirms a causal relation between scattering of marginally trapped particles and damping.
authors.affiliation: Physics Department, University of California at San Diego, La Jolla, California 92093, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Hilsabeck
authors.forename: A A
authors.initials: AA
authors.lastname: Kabantsev
authors.forename: C F
authors.initials: CF
authors.lastname: Driscoll
authors.forename: T M
authors.initials: TM
authors.lastname: O'Neil