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2008 Modifications of the edge electric field in the Compact Toroidal Hybrid PDF Print E-mail

2008 - American Physical Society - Division of Plasma Physics

 

Sheared flows arising from spatially inhomogeneous, transverse electric fields are of interest in space, laboratory and fusion plasmas.
 

                                                           Sheared flows
arising from spatially inhomogeneous, transverse electric fields are of in-
terest in space, laboratory and fusion plasmas. In toroidal fusion plas-
mas, these flows are often associated with enhanced stability regimes.
This presentation reports on recent experiments performed on the Com-
pact Toroidal Hybrid (CTH) device (R = 0.75 m, a ∼ 0.2 m , B ≤ 0.7,
ne ≤ 1019 m−3 ) in which a biased limiter inserted into the edge of
the plasma is used to modify the edge radial electric field. Probe mea-
surements indicate an asymmetric plasma response depending upon the
sign of the bias. Probe measurements are also compared with interfer-
ometer measurements, which confirm the asymmetric plasma response.
1 Supported  by US DOE Grant DE-FG02-00ER54476.
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