In cooperation with the Iranian Nuclear Society

Document Type : Scientific Note

Authors

1 Faculty of Physics and Energy Engineering, Amirkabir University of Technology, P.O.Box:15875-4413, Tehran-Iran

2 Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box: 14399-51113, Tehran - Iran

Abstract

Determining the magnetic field profile is very important for studying flux surfaces, elongation, plasma boundaries, and real-time control in tokamaks. In this research, a system for calculating and displaying the shape, position, and boundary of plasma for Damavand Tokamak control room has been developed. This system determines the magnetic field profile and flux surfaces in the time interval between two consecutive shots. This software is implemented based on measurements with the probes' sensors and electromagnetic flux loops. It also solves mathematical equations based on the physics of the problem. In order to calculate the magnetic field profile and the plasma shape, after preparing and collecting the data from the data acquisition system, a developed code is used to pre-process the data, such as noise reduction, removing unnecessary data, etc. Then, using another code, the cross-section parameters such as shape, position, and plasma boundary are calculated and displayed in the tokamak control room. All the codes of this system are written in MATLAB software and as a graphical user interface procedure. This is so the tokamak operator has easy access to the results after every shot. This system is currently installed and operated in the Damavand tokamak control room.

Highlights

  1. Ch. Rasouli, Equilibrium restoration in Damavand tokamak using gridless computing method, PhD Thesis, Shahid Beheshti University, (2015) (In Persian).

 

  1. J.M. Moret, et al, Tokamak equilibrium reconstruction code LIUQE and its real time implementation, Fusion Eng. Des., 91, 1 (2015).

 

  1. K. Yasuda, et al, Estimation of Tokamak Plasma Position and Shape in TOKASTAR-2 Using Magnetic Field Measurement, Plasma and Fusion Research, Regular Articles, 13, 3402072 (2018).

 

  1. R. Lopez-Callejas, et al, Plasma position measurement on the Novillo tokamak, Fusion Engineering and Design, 54, 21 (2001).

 

  1. C. Rasouli, F. Abbasi Davani, Identification of the plasma boundary shape and position in the Damavand tokamak, Plasma Phys. Rep., 43, 1 (2017).

 

  1. B. Pourshahab, et al, Temporal and spatial evolution of runaway electrons at the instability moments in Damavand tokamak, Physics of Plasmas, 23, 072501 (2016).

 

  1. M. Fatahi, et al, Optimal estimation of plasma boundary shape using magnetic probe measurements in Damavand tokamak, Fusion Engineering and Design, 170, 112519 (2021).

 

  1. D.W. Swain, G.H. Neilson, An efficient technique for magnetic analysis of non-circular, high-beta tokamak equilibria, Nuclear Fusion, 22, 1015 (1982).

 

  1. F. Hofmann, G. Tonetti, Fast identification of plasma boundary and X-points in elongated tokamaks, Nuclear Fusion, 28, 15 (1988).

Keywords

  1. Ch. Rasouli, Equilibrium restoration in Damavand tokamak using gridless computing method, PhD Thesis, Shahid Beheshti University, (2015) (In Persian).

 

  1. J.M. Moret, et al, Tokamak equilibrium reconstruction code LIUQE and its real time implementation, Fusion Eng. Des., 91, 1 (2015).

 

  1. K. Yasuda, et al, Estimation of Tokamak Plasma Position and Shape in TOKASTAR-2 Using Magnetic Field Measurement, Plasma and Fusion Research, Regular Articles, 13, 3402072 (2018).

 

  1. R. Lopez-Callejas, et al, Plasma position measurement on the Novillo tokamak, Fusion Engineering and Design, 54, 21 (2001).

 

  1. C. Rasouli, F. Abbasi Davani, Identification of the plasma boundary shape and position in the Damavand tokamak, Plasma Phys. Rep., 43, 1 (2017).

 

  1. B. Pourshahab, et al, Temporal and spatial evolution of runaway electrons at the instability moments in Damavand tokamak, Physics of Plasmas, 23, 072501 (2016).

 

  1. M. Fatahi, et al, Optimal estimation of plasma boundary shape using magnetic probe measurements in Damavand tokamak, Fusion Engineering and Design, 170, 112519 (2021).

 

  1. D.W. Swain, G.H. Neilson, An efficient technique for magnetic analysis of non-circular, high-beta tokamak equilibria, Nuclear Fusion, 22, 1015 (1982).

 

  1. F. Hofmann, G. Tonetti, Fast identification of plasma boundary and X-points in elongated tokamaks, Nuclear Fusion, 28, 15 (1988).