High-bootstrap, noninductively sustained electron internal transport barriers in the Tokamak à Configuration Variable

High-bootstrap, noninductively sustained electron internal transport barriers in the Tokamak à Configuration Variable

Important ingredients of the advanced-tokamak route to fusion have been explored in depth in the Tokamak à Configuration Variable fF. Hofmann, J. B. Lister, M. Anton et al., Plasma Phys. Controlled Fusion 36, B277 s1994dg over the past two years. Using a uniquely powerful and flexible electron-cyclotron resonance heating sECRHd system as the primary actuator, fully noninductive, steady-state el...

Global Plasma Oscillations in Electron Internal Transport Barriers in TCV

Global plasma oscillations have been observed in the Tokamak à Configuration Variable (TCV; R/a=0.88m/ 0.25m, BT<1.54T) in reversed magnetic shear discharges (fully non-inductive driven) with electron Internal Transport Barriers (eITBs). These slow oscillations involve the electron temperature and density and the plasma current. The triggering mechanism is the periodic destabilisation and stabi...

Recent results from the electron cyclotron heated plasmas in Tokamak à Configuration Variable „TCV..

Recent results from the electron cyclotron heated plasmas in Tokamak à Configuration Variable „TCV... M. A. Henderson, S. Alberti, C. Angioni, G. Arnoux, R. Behn, P. Blanchard, P. Bosshard, Y. Camenen, S. Coda, I. Condrea, T. P. Goodman, F. Hofmann, J.-Ph. Hogge, A. Karpushov, A. Manini, An. Martynov, J.-M. Moret, P. Nikkola, E. Nelson-Melby, A. Pochelon, L. Porte, O. Sauter, S. M. Ahmed, Y. An...

Recent Experimental Studies of Edge and Internal Transport Barriers in the Diii–d Tokamak

Interpretation of negative central shear electron internal transport barriers

Box-type electron temperature profiles observed in negative central shear plasmas with electron internal transport barriers are explained with the help of a novel instability mechanism that is predicted when keeping account of the radial component of the trapped electron gradB and curvature drifts in the theory of the trapped electron mode. These radial velocity components lead to a new term in...