Abstract Statistical analysis of magnetic fluctuations on Alcator C-Mod from 5 to 300 kHz provides a direct measurement of the propagation velocity of the instabilities and thereby of the plasma flow.
Sawtooth precursors characterize the core plasma velocity.
The magnetic fluctuations confirm the co-rotation measured by argon Doppler spectroscopy but with a small offset which might be attributable to neoclassical impurity drift relative to bulk ions. Details of the variation with plasma parameter regime will be presented. IE is incapable of rendering them. Use Netscape and complain to Microsoft. Core Plasma Rotation Tokamak plasmas often rotate rapidly.