Optimization of experimental snowflake configurations on TCV

Optimization of experimental snowflake configurations on TCV

The design of a snowflake (SF) equilibrium requires a strong effort on the poloidal field (PF) currents in terms of MAturns and mechanical loads. This has limited the maximum plasma current in SF configurations on Tokamak à Configuration Variable (TCV) to values well below the intrinsic MHD limits. In this paper the definition of optimized snowflake (SF) configurations in TCV and their experime...

Scrape-Off Layer Properties of Single-Null and Snowflake Diverted Plasmas in TCV

Function spaces on the snowflake

We consider two types of Besov spaces on the closed snowflake, defined by traces and with the help of the homeomorphic map from the interval [0, 3]. We compare these spaces and characterize them in terms of Daubechies wavelets.

Optimization, real-time simulation and feedback control of tokamak plasma profiles on TCV

Introduction Control of plasma profiles is an essential ingredient in tokamak operation, in particular to access improved confinement regimes where the safety factor (q) profile plays a major role in determining plasma confinement and stability. This paper shows how physics models of profile transport can be used for improved plasma profile control methods. We show two distinct applications. In...

Experimental Study of Energy-Minimizing Point Configurations on Spheres

In this paper we report on massive computer experiments aimed at finding spherical point configurations that minimize potential energy. We present experimental evidence for two new universal optima (consisting of 40 points in 10 dimensions and 64 points in 14 dimensions), as well as evidence that there are no others with at most 64 points. We also describe several other new polytopes, and we pr...