Dissipative trapped particle modes in tandem mirrors

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.865202· OSTI ID:5292853

Berk, H L; Rosenbluth, M N; Cohen, R H; Nevins, W M

Dissipative trapped particle modes are studied in tandem mirrors by including electron collisions and ion Landau damping. A variational approach is used to obtain a collisional response in terms of the collisionless result plus a collisional term. The collisional term is then self-consistently solved in all collision frequency regimes. When ..nu../..omega..<<1 (..nu..equivalentelectron collision frequency) and the dissipationless mode is stable through a positive (negative) charge uncovering mechanism, there are two stable waves with phase velocities in the ion (electron) diamagnetic direction. The higher frequency wave with ..omega..approx...omega..(/sub i/(..omega..(/sub e/) is destabilized by ion (electron) dissipation while the lower frequency wave is destabilized by electron (ion) dissipation. At high collision frequency (..nu..>..omega..(/sub e/), the only unstable trapped particle wave has ..omega..approx...omega..(/sub e/, with electron collisions being destabilizing.

• Research Organization: Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712
• OSTI ID: 5292853
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 28:9; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
CHARGED PARTICLES
COLLISIONAL PLASMA
COLLISIONS
DAMPING
ELECTRON COLLISIONS
ENERGY LOSSES
INSTABILITY
IONS
LANDAU DAMPING
LOSSES
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES
TANDEM MIRRORS
THERMONUCLEAR DEVICES
TRAPPED-PARTICLE INSTABILITY
VARIATIONAL METHODS