ESTIMATION OF PLASMA VERTICAL POSITION CONTROLLABILITY REGION IN KTM TOKAMAK WITH THE HFC COIL

ОЦЕНКА ОБЛАСТИ УПРАВЛЯЕМОСТИ ВЕРТИКАЛЬНЫМ ПОЛОЖЕНИЕМ ПЛАЗМЫ В ТОКАМАКЕ КТМ С КАТУШКОЙ HFC
Korenev P.S. Konkov A.E. Chektybayev B.Z. Kotov S.V. Zarva D.B.
2024 National Research Center Kurchatov Institute

Problems of Atomic Science and Technology, Series Thermonuclear Fusion
2024 #47 Issue 3 49 - 59 pp.

In modern tokamaks, plasma with a vertically elongated cross-section is created. However, the vertical position of the plasma in such a configuration is unstable, necessitating control systems to stabilize the plasma position. An important parameter characterizing the ability of a tokamak’s poloidal field coil system to control the vertical position of the plasma is the size of the controllability region. This article estimates the controllability region size of the KTM tokamak plasma with the HFC as the control coil, taking into account the power supply constraints. To estimate this region, plasma equilibria were reconstructed from magnetic diagnostic experimental signals, and plasma motion models were constructed based on these equilibria. Subsequently, current control system simulations were conducted for the HFC coil powered by a PWM inverter. The calculated lower estimate of the plasma controllability region is 23 cm, which is sufficiently large for a tokamak with a minor radius of 45 cm, demonstrating the feasibility of an effective plasma position control system using the HFC coil in the KTM tokamak.

controllability region , equilibrium reconstruction , linear plasma model , plasma position control , tokamak , voltage inverter

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V. A. Trapeznikov Institute of Control Sciences, Russian Academy of Sciences, Profsoyuznaya str. 65, Moscow, 117997, Russian Federation
Branch of the «Institute of Atomic Energy», The National Research Center of the Republic of Kazakhstan, Beibit atom str. 10, region Abai, Kurchatov, 180010, Kazakhstan
National Nuclear Center of Republic Kazakhstan, Beibit atom str., 2B, region Abai, Kurchatov, 180010, Kazakhstan

V. A. Trapeznikov Institute of Control Sciences
Branch of the «Institute of Atomic Energy»
National Nuclear Center of Republic Kazakhstan

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