\def\Topic{Role of external magnetic fields on plasma performance}

\def\Description{The purpose of the task is to try to characterize the influence of external magnetic fields on plasma behavior. Due to plasma 
current in toroidal direction, presence of magnetic field external to plasma of either vertical or horizontal direction should 
result in Lorentz force action on plasma column as a whole, which should shift plasma either vertically or horizontally. Such a 
field is generated by external sets of coils and is irreplaceable in plasma position control. Of the two possible major directions 
of generated field, the vertical direction is of more merit due to the fact that outward (e.g. horizontal) motion of plasma column is 
always present due to action of hoop force on the plasma column.   

To carry out the task successfully, it will be necessary to understand the issues of external magnetic field generation and quantification 
of the effect of this field on plasma, as a function of coil location and coil current magnitude and direction. This implies that development
of appropriate model of magnetic field will be crucial, as well as collaboration with groups working on 
magnetic diagnostics -- in order to obtain experimental means to scan relevant plasma parameters under different discharge regimes and different
currents in stabilization windings.}