Author/Authors :
Adamek، نويسنده , , J. and Rohde، نويسنده , , Janeta V. Popovici-Müller، نويسنده , , H.W. and Herrmann، نويسنده , , A. and Ionita، نويسنده , , C. and Schrittwieser، نويسنده , , R. and Mehlmann، نويسنده , , F. and Stِckel، نويسنده , , J. and Horacek، نويسنده , , J. and Brotankova، نويسنده , , J. and ASDEX Upgrade team and Contributors to EFDA-JET work programme، نويسنده ,
Abstract :
Experimental investigations of the plasma potential and electric field were performed for ELMy H-mode plasmas in the vicinity of the limiter shadow of ASDEX Upgrade. A fast reciprocating probe with a probe head containing four ball-pen probes (BPPs) [J. Adamek et al., Czech. J. Phys. 54 (2004) C95 – C99.] was used on the midplane manipulator. Different gradients of the plasma potential were observed during ELMs and in between them. The temporal resolution of the direct plasma potential measurements with BPP was determined by using power-spectra analysis.
