PHENOMENOLOGICAL RELATIONS FOR TOKAMAK TRANSPORT
The formalism of non-equilibrium thermodynamics is applied to the problem of transport in fully ionized (tokamak) plasmas. Phenomenological relations between generalized forces and fluxes, consistent with empirically determined scalings, are suggested. A simple one-dimensional transport model incorporating these relations is shown to reproduce the main features of recent pellet injection experiments. Simulations of pellet injection on ALCATOR-C show: a drop in the central temperature preceeding pellet penetration, rapid (<500 usec) peaking of the density profiles, a marked rise in the energy confinement time immediately following injection, and long term (>30 msec) persistence of the state of high confinement time and peaked density.
Bibliographic Reference: WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(86)13, 1986
Record Number: 1989125023100 / Last updated on: 1987-02-01
Available languages: en