Anomalous thermal confinement in ohmically heated tokamaks

Technical Report · Sat Feb 01 04:00:00 EST 1986

DOI:https://doi.org/10.2172/6022305· OSTI ID:6022305

Romanelli, F; Tang, W M; White, R B

A model is proposed to explain the behavior of the gross energy confinement time in ohmically heated tokamak plasmas. The analysis takes into account the effect of the anomalous thermal conductivity due to small scale turbulence and of the macroscopic MHD behavior, which provides some constraints on the temperature profile. Results indicate that the thermal conductivity associated with the dissipative trapped-electron mode and with the ion temperature gradient (eta/sub i/) mode can account, respectively, for the Neo-Alcator scaling and the saturation of the energy confinement time with density. Comparisons with experimental results show reasonable agreement. 32 refs., 12 figs.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6022305
• Report Number(s): PPPL-2310; ON: DE86007528
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED PLASMA DEVICES
CONFINEMENT TIME
ELECTRIC CONDUCTIVITY
ELECTRIC DISCHARGES
ELECTRIC HEATING
ELECTRICAL PROPERTIES
FLUID MECHANICS
HEATING
HYDRODYNAMICS
JOULE HEATING
MAGNETOHYDRODYNAMICS
MECHANICS
PHYSICAL PROPERTIES
PLASMA HEATING
PLASMA SIMULATION
RESISTANCE HEATING
SIMULATION
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES