Probe measurements of plasma fluctuations in the divertor region of ASDEX Upgrade reveal the existence of two quiescent regions close to the separatrix: one on the low field side scrape-off layer and one on the high field side of the private flux region. The X-point manipulator at ASDEX Upgrade provides the unique possibility of obtaining continuous measurements of the ion-saturation current from the low field side scrape-off layer through the private flux region and into the high field side scrape-off layer.
Quiescent regions below the X-point in ASDEX upgrade
Nem R.D.; Manz P.; Rasmussen J.J.; Vianello N.; Walkden N.; Naulin V.; Sieglin B.; Herrmann A.; Brida D.; ASDEX Upgrade Team
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