The Spherical Tokamak (ST) is a
compact, low-aspect-ratio variant of the conventional tokamak, known for its
ability to operate at very high plasma pressure relative to the magnetic field
— a crucial advantage for future fusion reactors. With its naturally high
elongation and strong shaping, the ST are recently in focus to explore
high-beta plasma physics and non-inductive current drive techniques essential
for steady-state operation.
We have recently commissioned a
laboratory-scale spherical tokamak at our institute. Designed and built
primarily by a young team of scientists and engineers under the able guidance
of experienced faculty members, this device marks India’s first spherical
tokamak.
The primary objective of this
facility is to carry out fundamental physics research on spherical tokamak
equilibria, non-inductive plasma start-up and current sustainment, high-beta
plasma operation, and wall conditioning techniques. These studies will provide
valuable proof-of-principle insights relevant to the development of
steady-state tokamak-based fusion reactors.
