TY  - JOUR
AU  - Windisch, T.
AU  - Krämer-Flecken, A.
AU  - Velasco, JL
AU  - Könies, A.
AU  - Nührenberg, C.
AU  - Grulke, O.
AU  - Klinger, T.
TI  - Poloidal correlation reflectometry at W7-X: radial electric field and coherent fluctuations
JO  - Plasma physics and controlled fusion
VL  - 59
IS  - 10
SN  - 1361-6587
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2017-06363
SP  - 105002 -
PY  - 2017
AB  - Poloidal correlation reflectometry measurements during the first plasma campaign of the optimized stellarator Wendelstein-7X are presented. The radial electric field is determined and a comparison with neoclassical calculations and shows good qualitative agreement. The measured density fluctuation spectrum exhibits coherent low- and high-frequency modes. Magneto-hydrodynamic (MHD) modeling results suggest that the coherent fluctuations are caused by stable MHD-modes and Alfvén waves.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000406839500002
DO  - DOI:10.1088/1361-6587/aa759b
UR  - https://juser.fz-juelich.de/record/837450
ER  -