Investigation of the radial electron heat diffusivity during neutral beam injection heating at TEXTOR
This paper reports on radial electron heat diffusivity experiments performed at TEXTOR which show different behaviour of power balance calculations (X(PB)), heat pulse propagation (X(HP)) and incremental electron heat (X(INC)) as a function of the total power and the electron temperature gradient respectively. The observed difference between these quantities is an indicator for more complicated transport phenomena during a sawtooth crash, disturbing the plasma outside the mixing radius. The results indicate that different physical processes are involved in the ECRH induced heat pulse experiments compared to the inverted sawtooth heat pulse studies. Therefore the X(HP) values estimated from both methods cannot easily be compared.
Bibliographic Reference: Article: 21st EPS Conference on Controlled Fusion and Plasma Physics, Montpellier, 27 June - 1 July, 1994, Vol. 18B (1994) Part I, pp. 122-125
Record Number: 199510180 / Last updated on: 1995-02-07
Original language: en
Available languages: en