Analysis of thermal response of new diagnostic probe in TCV

Abstract

• Thermal response of the new probe head during triple plunge into the TCV tokamak has been analysed numerically. • The applied heat load corresponds to the heat flux distribution in the Scrape-Off-Layer. • Thermal resistance between shroud cap and the shroud cylinder determines the probe’s thermal behaviour. • The predicted temperatures show that the critical values are not exceeded in any of the probe components. • The results demonstrated suitability of the probe’s design for the measurements in TCV. Thermal response of the new multi-purpose diagnostic probe inside the TCV (Tokamak à Configuration Variable) tokamak is studied. The New Probe Head (NPH) was constructed at the University of Innsbruck and developed in collaboration with various European laboratories within EUROfusion program. The NPH can be used in different MST devices by applying corresponding adapters. Its design, followed by the prototype, has to go through a number of tests (numerical and experimental), before it can be used in the tokamak environment, where it has to withstand repeated exposure to the Scrape-Off-Layer (SOL) plasma. Presented numerical analyses of the NPH thermal response inside the TCV tokamak are performed by the Jožef Stefan Institute.