Gyro-Landau fluid model of tokamak core fluctuations. Progress report

Technical Report · Mon Jun 01 04:00:00 EDT 1992

OSTI ID:10145499

Leboeuf, J N; Carreras, B A; Dominguez, N; Hedrick, C L; Sidikman, K L; Lynch, V E; Drake, J B; Walker, D W

Dissipative trapped electron modes (DTEM) may be one of the causes of deterioration of confinement in tokamak and stellatator plasmas. We have implemented a fluid model to study DTEM turbulence in slab geometry. The electron dynamics include in addition to the adiabatic part, a non-adiabatic piece modeled with an i-delta-type response. The ion dynamics include Landau damping and FLR corrections through Landau fluid approximate techniques and Pade approximants for {Gamma}{sub 0}(b)=I{sub 0}(b)e{sup {minus}b}. The model follows from the gyrokinetic equation. Evolution equations, which closely resemble those used in standard reduced MHD, are presented since these are better suited to non-linear calculations. The numerical results of radially resolved calculations will be discussed. A recently developed hybrid model, which consists of a gyrokinetic implementation for the ions using particles and the same description for the electron dynamics as in the fluid model, will also be presented.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10145499
• Report Number(s): CONF-9204132--1-Extd.Abst.; ON: DE92013277
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700370
FLOW MODELS
FLUCTUATIONS
LANDAU DAMPING
PLASMA FLUID AND MHD PROPERTIES
PROGRESS REPORT
TOKAMAK DEVICES
TRAPPED ELECTRONS
TURBULENCE