1. Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009

2. 2CWGM5, Stuttgart, 7.7.2009 Edge/SOL - transition [J. Horacek et al] Drift- waves Interchange- instabilities

3. 3CWGM5, Stuttgart, 7.7.2009 Edge/SOL – dynamics in TJ-K Reduced confinement region

4. 4CWGM5, Stuttgart, 7.7.2009 Probe array in TJ-K 8 tungsten pins Poloidal distance 5mm

5. 5CWGM5, Stuttgart, 7.7.2009 „Blob“-dynamics [T.Happel et al, PRL 102, 2009]

6. 6CWGM5, Stuttgart, 7.7.2009 Probability density function (PDF) of Isat [P. Abdul] S=-0.6 S=+0.9

7. 7CWGM5, Stuttgart, 7.7.2009 Probe array in AUG 14 carbon pins Poloidal distance 3mm

8. 8CWGM5, Stuttgart, 7.7.2009 Probability density function (PDF) of Isat #22505 AUG: “holes” “blobs” [B. Nold]

9. 9CWGM5, Stuttgart, 7.7.2009 Phase velocity shear layer

10. 10CWGM5, Stuttgart, 7.7.2009 Probe arrangement floating potential ion-saturation current [C. Lechte]

11. 11CWGM5, Stuttgart, 7.7.2009 Radial profiles

12. 12CWGM5, Stuttgart, 7.7.2009 Distribution of I i,sat fluctuations No indication of density holes Change in number of positive events (blobs) in edge shear region

13. 13CWGM5, Stuttgart, 7.7.2009 Propagation of blobs U dia,i U ExB

14. 14CWGM5, Stuttgart, 7.7.2009  t: time dependence

15. 15CWGM5, Stuttgart, 7.7.2009 Potential raise at plasma edge

16. 16CWGM5, Stuttgart, 7.7.2009 Turbulent transport

17. 17CWGM5, Stuttgart, 7.7.2009 Common: increasing number of intermittent events („blobs“) across separatrix Uncommon: reversal of phase velocity (mechanism?), „holes“ Insights from other experiments needed to work out differences and universalities, role of islands, mechanism of velocity reversal...