Design of the ohmic system for SST-1

Design, simulation and construction of the Taban tokamak

“…The OH coils consist of two main components including a central solenoid and its outer turns. The first produces the high ionizing electric field as well as the desired flux and the second part guides the return flux from the solenoid out around the plasma, adding minimal field contribution, which interferes with the initiation positioning of the plasma [21,22] The combination of field lines of the TF and poloidal fields generated by the plasma current leads to a helical magnetic field to confine the plasma in the tokamak [5,23,24].…”

“…The required high peak voltage and power to initiate the plasma discharge are obtained by the OH coil as an inductive energy storage element and the OH coils are poloidally distributed to maintain B OH =0 within the plasma volume. The 2D FEM simulation has been performed to position the coils [24,27,28]. The system has been designed for a maximum stray magnetic field of 40 G kA −1 current in the primary of the OH coils, at the plasma center.…”

“…The OH coils consist of the central solenoid with sets of compensating windings that are poloidally distributed around the VV to minimize the stray fields in the plasma volume [21,24,27]. This arrangement has been simulated with 2D axisymmetric in magneto-static mode using the FEM.…”