Publication

Poloidal field coils optimization for the MANTA tokamak using TokaMaker

2026

Abstract

Utilizing the TokaMaker code, this manuscript presents a scheme for determining the optimal locations of poloidal field coils in tokamak configurations, aimed at reducing the currents required to reproduce target equilibrium in future devices. The definition of the coil position space is described, as well as the cost function is to be minimized, which incorporates the constraints of the problem. The MANTA reactor design, featuring strong negative triangularity shaping, is considered as a test example, where preliminary results are obtained with a reduced number of degrees of freedom in order to highlight the procedure for finding local minima. Application of the optimization procedure, guided by a study of the electric current regularization parameter, results in new suggestions for the placement of each poloidal field (PF) coil. This leads to a reduction in the total current flowing through the PF coils by 37% while accurately reproducing the target plasma boundary compared to a baseline case.

Official source

https://infoscience.epfl.ch/entities/publication/623ed341-02fb-4431-9b65-a7958bfeee25

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/623ed341-02fb-4431-9b65-a7958bfeee25

About this result

Related concepts (32)

Reversed field pinch

A reversed-field pinch (RFP) is a device used to produce and contain near-thermonuclear plasmas. It is a toroidal pinch which uses a unique magnetic field configuration as a scheme to magnetically confine a plasma, primarily to study magnetic confinement fusion. Its magnetic geometry is somewhat different from that of the more common tokamak. As one moves out radially, the portion of the magnetic field pointing toroidally reverses its direction, giving rise to the term reversed field.

Tokamak

A tokamak (ˈtoʊkəmæk; токамáк) is a device which uses a powerful magnetic field to confine plasma in the shape of a torus. The tokamak is one of several types of magnetic confinement devices being developed to produce controlled thermonuclear fusion power. , it was the leading candidate for a practical fusion reactor. Tokamaks were initially conceptualized in the 1950s by Soviet physicists Igor Tamm and Andrei Sakharov, inspired by a letter by Oleg Lavrentiev. The first working tokamak was attributed to the work of Natan Yavlinsky on the T-1 in 1958.

Field-reversed configuration

A field-reversed configuration (FRC) is a type of plasma device studied as a means of producing nuclear fusion. It confines a plasma on closed magnetic field lines without a central penetration. In an FRC, the plasma has the form of a self-stable torus, similar to a smoke ring. FRCs are closely related to another self-stable magnetic confinement fusion device, the spheromak. Both are considered part of the compact toroid class of fusion devices.

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Poloidal field coils optimization for the MANTA tokamak using TokaMaker

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