Oblique pellet injection experiments have been performed in RTP ohmic and electron cyclotron (EC) heated plasmas. Peripheral cooling induces a transient rise of the electron temperature (Te) in the plasma core, with the formation of a region of a high Tegradient (transient transport barrier). The position of the barrier appears to be linked with the location of low-order rational magnetic surfaces. For Ohmic and EC heated plasmas with resonance moderately off-axis, the Terise is peaked in the plasma centre and the footpoint of the barrier is located close to the q = 2 surface. For EC plasmas with far off-axis resonance, i.e. in plasmas exhibiting hollow Teprofiles, the Terise starts off-axis, near the innermost low order rational surface (typically q = 3). It then propagates to the centre in a seemingly diffusive way. © 2000 IOP Publishing Ltd.
All Science Journal Classification (ASJC) codes
- Nuclear Energy and Engineering
- Condensed Matter Physics
Gorini, G., Mantica, P., Hogeweij, G. M. D., De Kloe, J., & Lopes Cardozo, N. J. (2000). Transient transport barriers in ohmic and electron cyclotron heated RTP plasmas: Relation with rational magnetic surfaces. Plasma Physics and Controlled Fusion, 42(SUPPL. 5A), -. https://doi.org/10.1088/0741-3335/42/5A/317