Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed...
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![Page 1: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/1.jpg)
Institut für PlasmaforschungUniversität Stuttgart
Plasma Turbulenceat the Transition from
Closed to Open Fieldlines
Mirko Ramisch
07.07.2009
![Page 2: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/2.jpg)
2CWGM5, Stuttgart, 7.7.2009
Edge/SOL - transition
[J. Horacek et al]Drift-
wavesInterchange-instabilities
![Page 3: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/3.jpg)
3CWGM5, Stuttgart, 7.7.2009
Edge/SOL – dynamics in TJ-K
Reduced confinement region
![Page 4: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/4.jpg)
5CWGM5, Stuttgart, 7.7.2009
„Blob“-dynamics
[T.Happel et al, PRL 102, 2009]
![Page 5: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/5.jpg)
6CWGM5, Stuttgart, 7.7.2009
Probability density function (PDF) of Isat
[P. Abdul]
S=-0.6 S=+0.9
![Page 6: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/6.jpg)
7CWGM5, Stuttgart, 7.7.2009
Probe array in AUG
14 carbon pins
Poloidal distance 3mm
![Page 7: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/7.jpg)
8CWGM5, Stuttgart, 7.7.2009
Probability density function (PDF) of Isat
#22505
AUG:
“holes” “blobs”
[B. Nold]
![Page 8: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/8.jpg)
9CWGM5, Stuttgart, 7.7.2009
Phase velocity shear layer
![Page 9: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/9.jpg)
10CWGM5, Stuttgart, 7.7.2009
Probe arrangement
floating potential
ion-saturation current
[C. Lechte]
![Page 10: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/10.jpg)
11CWGM5, Stuttgart, 7.7.2009
Radial profiles
![Page 11: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/11.jpg)
12CWGM5, Stuttgart, 7.7.2009
Distribution of Ii,sat fluctuations
No indication of density holes Change in number of positive events (blobs) in edge shear region
![Page 12: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/12.jpg)
13CWGM5, Stuttgart, 7.7.2009
Propagation of blobs
Udia,i
UExB
![Page 13: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/13.jpg)
14CWGM5, Stuttgart, 7.7.2009
t: time dependence
![Page 14: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/14.jpg)
15CWGM5, Stuttgart, 7.7.2009
Potential raise at plasma edge
-2
-10
12
0.81
0.82
0.83
0.84
0.85
20
40
60
80
100
r-rsep (cm)time (s)
f (V
)
![Page 15: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/15.jpg)
16CWGM5, Stuttgart, 7.7.2009
Turbulent transport
-2-1
01
2
0.81
0.82
0.83
0.84
0.85
0
5
x 104
r-rsep (cm)time (s)
(a
.u.)
cosv~n~rvnr
![Page 16: Institut für Plasmaforschung Universität Stuttgart Plasma Turbulence at the Transition from Closed to Open Fieldlines Mirko Ramisch 07.07.2009.](https://reader036.fdocuments.us/reader036/viewer/2022062322/5697c0021a28abf838cc2eba/html5/thumbnails/16.jpg)
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...