Abstract
An Electrical-Model is developed for ADITYA-U Tokamak to study the generation of different shapes and duration of LVs out of the total available flux, which is 0.6 Vs in positive convertor supply. Loop voltage (LV) is required to be controlled during plasma discharge to optimize and predict the breakdown of plasma, proper impurity burn-through time, plasma current magnitude and duration of the plasma as per the experimental requirement. Loop voltage waveform is governed by selecting different magnitudes of resistance values, switching time and duration of external resistance in the wave shaping primary circuit. Loop voltage control system has been modelled using simulation code (Electrical-Model). Same results have been validated with the modelling of ohmic wave shaping circuit in MATLAB-Simulink. Temporal profile of loop voltage has been incorporated for ADITYA-U Tokamak for several plasma discharges, and detailed observations and results are presented in the paper.
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