Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Fluids
28 (1985), S. 2248-2257
ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Recent experiments on the TMX-U device at the Lawrence Livermore National Laboratory have indicated the possibility of a low-frequency (ω(very-much-less-than)Ωci) drift wave being driven unstable by the injection of neutral beams in the thermal barrier region. Nonlocal linear theory is performed for this instability using slab geometry and the electrostatic approximation. Particle simulations are used to verify the linear theory and to recover relevant nonlinear phenomena. Important nonlinear effects include: (1) E×B trapping (2) relaxation of the beam density profiles, and (3) weakly nonlinear electrons (eδφ/Te ≈0.1). These nonlocal simulations are compared with previous simulations of Ref. 1 [Phys. Fluids 28, 2235 (1985)] which used a local approximation for the particle simulations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.865277
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