Damping of the trapped-particle diocotron mode.
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.
Hilsabeck
T J
TJ
Physics Department, University of California at San Diego, La Jolla, California 92093, USA.
Kabantsev
A A
AA
Driscoll
C F
CF
O'Neil
T M
TM