Abstract

To improve energy confinement time, the next generation of tokamaks will operate with vertically elongated plasmas. The main drawback of such a shaped cross section is that the plasma is unstable with respect to vertical displacements from the reference equilibrium position. To avoid contact with the containment structures, it is necessary to design reliable control systems that stabilise the plasma's vertical instability. In our previous work [2, 5, 6], several control systems were designed to control these plasma instabillties, the aim of this paper is two fold, firstly, we will investigate "anti-windup'" compensation and secondly "bumpless transfer" schemes applied to the vertical position control of ITER plasmas.

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