Time dependent Equilibrium Reconstruction in LTX_B

The conventional equilibrium reconstruction represents a time slice of measurements

where unknown contribution of eddy currents in conducting structures is replaced by a set

of time independent basis contributions with adjusted weights for better fit of measurements.

reconstruction technique targets reconstruction of plasma profiles using 

The response function technique, developed for LTX-B allows to eliminate the

eddy currents using their full time history. In addition to numerical technique for simulating

response functions from a set of basis plasma configuration, the same technique allows for

elimination of contribution of the eddy currents, excited by the plasma itself. As a result, the

equioibrium reconstruction in situation with significant eddy current distribution is reduced

to standard thechnique of adjsuting plasma current distribution to the signals from the 

equilibrium coil system and plasma. The results of application of this technique for recent 

high plasma current discharges on LTX-B are reported.