Temperature profiles of time-dependent tokamak plasmas from parallel Ohm's law
A profile consistency transport model based on the parallel component of the ohmic law has been used to obtain electronic temperature profiles, both for stationary and nonstationary tokamak plasmas. Ohm's law contains a resistive neoclassical term and a term that accounts for the bootstrap current contributions. A numerical code has been developed to find solutions according to the MHD equilibrium equations. For stationary plasmas, the temperature profiles obtained are close to the experimental data for several very different machines (JET, TFTR, ASDEX, Alcator-C and FT). The main feature of the model is its capability to provide an easy parametrisation of the ohmic law in nonstationary cases. A rule for estimating the current diffusion times inside the plasma volume in such situations can also be given. The values predicted by the model can account for both the temperature profiles and the stabilisation times in the nonstationary pulses observed at JET.
Bibliographic Reference: Report: RT/NUCL/90/35 EN (1991) 38 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199210148 / Last updated on: 1994-12-02
Original language: en
Available languages: en