Fundamental studies of fusion plasmas

Technical Report · Tue Apr 27 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/6601972· OSTI ID:6601972

Aamodt, R E; Catto, P J; D'Ippolito, D A; Myra, J R; Russell, D A

Work on ICRF interaction with the edge plasma is reported. ICRF generated convective cells have been established as an important mechanism for influencing edge transport and interaction with the H-mode, and for controlling profiles in the tokamak scrape-off-layer. Power dissipation by rf sheaths has been shown to be significant for some misaligned ICRF and IIBW antenna systems. Near-field antenna sheath work has been extended to the far-field case, important for experiments with low single pass absorption. Impurity modeling and Faraday screen design support has been provided for the ICRF community. In the area of core-ICRF physics, the kinetic theory of heating by applied ICRF waves has been extended to retain important geometrical effects relevant to modeling minority heated tokamak plasmas, thereby improving on the physics base that is standard in presently employed codes. Both the quasilinear theory of ion heating, and the plasma response function important in wave codes have been addressed. In separate studies, it has been shown that highly anisotropic minority heated plasmas can give rise to unstable field fluctuations in some situations. A completely separate series of studies have contributed to the understanding of tokamak confinement physics. Additionally, a diffraction formalism has been produced which will be used to access the focusability of lower hybrid, ECH, and gyrotron scattering antennas in dynamic plasma configurations.

• Research Organization: Lodestar Research Corp., Boulder, CO (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-88ER53263
• OSTI ID: 6601972
• Report Number(s): DOE/ER/53263-28; LRC-93-41; ON: DE93013144
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ICR HEATING
TOKAMAK DEVICES
ANTENNAS
IMPURITIES
LOWER HYBRID HEATING
MATHEMATICAL MODELS
PLASMA SHEATH
PROGRESS REPORT
CLOSED PLASMA DEVICES
DOCUMENT TYPES
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
PLASMA HEATING
THERMONUCLEAR DEVICES
700350* - Plasma Production
Heating
Current Drive
& Interactions- (1992-)