Return To: Session PD/P - Post Deadline Posters
Prev Page: (PD/P-03) Anomalous Transparency Induced by High Intensity Laser
Next Page: (PD/P-06) Rokkasho: Japanese Site for ITER

(PD/P-04) Statistical Theory of L-H Transition and its Implication to Threshold Data Base

S.-I. Itoh¹⁾, K. Itoh²⁾, S. Toda^2)
 
1) Research Institute for Applied Mechanics, Kyushu University, Kasuga, Japan
²⁾ National Institute for Fusion Science, Toki, Japan

Abstract.  A statistical model for the bifurcation of the radial electric field E_r is analyzed in view of describing L-H transitions of toroidal plasmas. Noise in micro fluctuations is shown to lead to random changes of E_r, if a deterministic approach allows for more than one solution. The probability density function for and the ensemble average of Er are obtained. The L-to-H and the H-to-L transition probabilities are calculated, and the effective phase limit is derived. Due to the suppression of turbulence by shear in E_r, the limit deviates from Maxwell's rule.

Read the full paper in PDF format.