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Author: Jungpyo Lee
Requested Type: Poster
Submitted: 2018-02-16 20:27:40


Contact Info:
Hanyang University
222 Wangsimni-ro, Seongdong-gu
Seoul,   04763
South Korea

Abstract Text:
A similarity relation between RF wave systems in tokamaks is found by investigating the coupled equations, which model the RF wave propagation and damping. The scaling conditions of plasma density and temperature, tokamak size and magnetic fields, and RF wave frequency and power are obtained for the similar self-consistent solutions of the coupled equations: Maxwell’s equations, Grad-Shafranov equation, and Fokker-Planck equation. The wave solution of Maxwell’s equations in a tokamak is based on the static magnetic field solution of Grad-Shafranov equation, and it is coupled with Fokker-Planck equation to include the kinetic effect of non-Maxwellian plasmas. The consistency of the scaling conditions with the existing transport scaling of tokamak is also investigated. The similarity found in this study can make two types of contributions. The first one is to find the possibility of a test system (wind tunnel) for the RF wave system. Because building a high power RF wave system in a large tokamak is significantly expensive, finding an alternative test system similar to the original one with a low cost can be beneficial. The other is to verify existing codes to solve the coupled equations. The coupled codes (AORSA-ECOM-CQL3D) solving the system of equations are verified by confirming that the solutions satisfy the similarity relations.