Modelling of RFX-mod2 tokamak equilibria with DEMO-like shape conditions and negative triangularity. (22nd June 2020)

• Record Type: Journal Article
• Authors: Abate, D; Marchiori, G; Bettini, P; Villone, F
• Is Part Of: Plasma physics and controlled fusion. Volume 62:Number 8(2020)
• Publication Date: 2020-06-22
• Subjects: tokamak -- negative triangularity -- plasma equilibrium -- vertical stability -- optimization -- plasma shape; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/1361-6587/ab93a5
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: In this paper, DEMO-like shaped plasma equilibria are defined for RFX-mod2 tokamak operations by using the Inverse Equilibrium Tool (IET code). IET allows for the computation of the coil currents needed to obtain a predetermined plasma shape with well defined plasma global parameters (i.e. total plasma current and total poloidal magnetic flux at the boundary) by solving a constrained minimization problem. The new shape conditions would allow achieving higher plasma current and plasma density values at the same toroidal magnetic field and safety factor limits of previous RFX-mod tokamak operations. The feasibility of these new equilibria is explored in terms of coil current requirements and vertical stability analysis. This study shows that RFX-mod2 is a flexible device, able to perform DEMO-like shaped tokamak operations with low requirements on both magnitude and distribution of active coil currents.