Staircase temperature profiles and plasma transport self-organisation in a minimum kinetic model of turbulence based on the trapped ion mode instability

Joint Varenna-Lausanne International Workshop 2014

Cartier-Michaud, T.^1 ; Ghendrih, P.^1 ; Sarazin, Y.^1 ; Dif-Pradalier, G.^1 ; Drouot, T.^2 ; Estève, D.^1 ; Garbet, X.^1 ; Grandgirard, V.^1 ; Latu, G.^1 ; Norscini, C.^1 ; Passeron, C.^1

CEA/DSM/IRFM, Cadarache, Saint-Paul-Lez-Durance

13108, France^1

IJL, Nancy, France^2

关键词: Confinement properties;    Kinetic modeling;    Mode instabilities;    Parameter spaces;    Plasma transport;    Relaxation event;    Self organisation;    Temperature profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/561/1/012003/pdf
DOI  :  10.1088/1742-6596/561/1/012003

来源: IOP

【 摘 要 】

A minimum model of plasma turbulence in a kinetic framework is presented. It is based on trapped ion turbulence, gyro and bounce averaged, and implemented in the versatile and efficient code TERESA. Zonal flow - streamer interplay are readily shown to be key players that govern the confinement properties of the model. The parameter space of the model is explored with brute force numerics. A generic result is either a streamer dominated pattern with large transport, or a staircase temperature profile with very marked corrugations and quenched transport. A case with off-axis heating is found to exhibit quasiperiodic relaxation events relevant to investigate dynamical turbulence self-organisation.