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Please use this identifier to cite or link to this item: http://arks.princeton.edu/ark:/88435/dsp0170795b055
Title: Observation of quasi-coherent edge fluctuations in Ohmic plasmas on NSTX
Contributors: Banerjee, Santanu
Banerjee, S.
A. Diallo
S.J. Zweben
U. S. Department of Energy contract number DE-AC02-09CH11466
Keywords: Turbulence
Issue Date: Apr-2016
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Physics of Plasmas, vol. 23, p. 044502, April 2016
Abstract: A quasi-coherent mode with frequency f = 40 kHz is observed in Ohmic plasmas in NSTX with the gas puff imaging diagnostic (GPI). This mode is located predominantly just inside the separatrix, with a maximum fluctuation amplitude similar to that of the broadband turbulence in the same frequency range. The quasi-coherent mode has a poloidal wavelength 16 cm and a poloidal velocity 49 km/s in the electron diamagnetic direction, which are similar to the characteristics expected from a linear drift-wave like mode in the edge.
URI: http://arks.princeton.edu/ark:/88435/dsp0170795b055
Referenced By: doi: 10.1063/1.4946871
Appears in Collections:NSTX

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