Informatics Publishing Limited

J. Femila Roseline ¹, N. M. Nandhitha ²

Affiliations
1 Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai, 600 119, IN
2 Department of Electronics and Communication Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai, 600 119, IN

Abstract

Plasma position control is a major concern in Tokamak machines. Radial position and plasma current are the input parameters that affect the plasma stabilization current which in turn affects the plasma position. As the relationship between the input and output parameters are non linear in nature, intelligent controllers are to be developed. In this paper, FIS based plasma position controller is developed. Also the optimization of linguistic variables and membership functions is performed based on the accuracy of the results. It is found that triangular membership with 9 linguistic variable provide better results for stabilization current prediction.

Keywords

Feedback Coil Current, Fis, Plasma, Plasma Current, Radial Position

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J. Femila Roseline ¹, Yasser Arafat ², Jigneshkumar J. Patel ³, J. Govindarajan ⁴, N. M. Nandhitha ⁵, B. Sheela Rani ⁶

Affiliations
1 Department of Electrical and Electronics Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
2 Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
3 Electronics Group, Institute of Plasma Research, IN
4 Institute of Plasma Research, IN
5 Department of Electronics and Telecommunication Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
6 Electronics & Instrumentation, Sathyabama University, Chennai-600119, IN

Abstract

Tokamaks are machines used for generating electrical power through nuclear fusion from plasma that is confined within the toroidal chamber. As Tokamaks require large amount of input power to produce plasma, the efficiency can be improved only when significant output power is generated. Hence in recent years, research has begun in this area to improve its efficiency. From the literature, it is found that the amount of power generated is dependent on the density of the plasma, plasma position and time duration for which the plasma is properly stabilized. In order to improve the efficiency, it is necessary to confine the plasma for longer durations within the chamber. This paper provides an extensive review of various researches conducted in this area to improve the efficiency of the Tokamak machines by stabilizing the plasma. From the literature cited, it is obvious that an adaptive plasma positioning system is yet to be evolved.

Keywords

Tokamaks, Plasma, Position Confinement, PID Controller, Fuzzy Logic Controller.

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