1,721,283 research outputs found
A mechanism for plasma heating in driven relaxing magnetic field configurations
No full textMagnetic configurations used for laboratory plasma confinement and those naturally occurring in the solar corona are both driven systems: in the former, the energy input is generally supplied by externally applied voltages; in the latter, by boundary fluid motions in the photosphere. Moreover, solar corona dynamics has been described in a very similar way to Reversed Field Pinch dynamics. Using these analogies as a starting point, a description is presented, supported by experimental results, of plasma heating in driven partially relaxed RFP configurations resulting from energy dissipation during reconnection processes. The power deposited in the plasma through this mechanism adds to the Joule heating of the mean field dissipation and may also provide a direct channel for ion heating through viscous dissipation
Experimental evidence of on axis q oscillations in ETA-BETA II
No full textMagnetic field profiles have been measured in the ETA BETA II reversed field pinch (RFP) experiment by a set of insertable probes for discharges in which both the plasma current and the toroidal field at the wall are sustained. At a high value of the pinch parameter large oscillations are externally measured on the toroidal flux and on the other global quantities during the sustainment of the discharge. These oscillations are found to correspond to large current redistributions in the plasma
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