Determination of operating parameters of toroidal field coils of a tokamak based on a high-temperature superconductor

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Abstract

Aim: to determine the operating parameters of the toroidal magnetic field system (operating temperature, number of CORC cables, transport current value) of the MEPhIST-1 superconducting tokamak

Materials and Methods: numerical calculation of the toroidal magnetic field of a tokamak was performed in the COMSOL Multiphysics software

Results: magnetic field distributions were obtained for various values of the transport current flowing through the tokamak coil. The proportionality coefficients between the maximum magnetic field on the coil and the transport current, the operating magnetic field and the operating transport current were determined.

Conclusion: the number of CORC cables required to achieve an operating magnetic field induction of 1 T has been determined: 7 at a temperature of 37.6 K and 6 at a temperature of 33.6 K. It has been shown that it is possible to achieve an operating field value of about 1.5T with 7 CORC cables when the temperature is lowered to 21.1 K.

About the authors

D. A. Aleksandrov

National research nuclear university MEPHI

Email: cfrfcfrfdima123@gmail.com
ORCID iD: 0009-0001-7383-0094
SPIN-code: 5365-6190

research engineer

Russian Federation, Moscow

I. V. Martirosian

National research nuclear university MEPHI

Email: mephizic@gmail.com
ORCID iD: 0000-0003-2301-1768
SPIN-code: 3368-8809

Cand. Sci. (Phys. Math.), research engineer

Russian Federation, Moscow

E. A. Vinitskiy

National research nuclear university MEPHI

Email: egor.vinitsky@gmail.com
ORCID iD: 0009-0003-9462-5756
SPIN-code: 9216-7080

engineer

Russian Federation, Moscow

M. A. Osipov

National research nuclear university MEPHI

Author for correspondence.
Email: max.vfk@gmail.com
ORCID iD: 0000-0002-8981-5606
SPIN-code: 4776-7939

research engineer

Russian Federation, Moscow

S. V. Pokrovskii

National research nuclear university MEPHI

Email: sergeypokrovskii@gmail.com
ORCID iD: 0000-0002-3137-4289
SPIN-code: 6643-7817

Cand. Sci. (Phys. Math.), Head of the Laboratory

Russian Federation, Moscow

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Supplementary files

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2. Fig. 1. (a) - Cross section of the toroidal coil for the MIFIST-1 tokamak, inner radius R1 = 93 mm, outer radius R2= 0.7 m; (b) - Current line for the toroidal continuous solenoid for the MIFIST-1 tokamak

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3. Fig. 2. External view of the cryomagnetic system of the toroidal magnetic field of the tokamak

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4. Fig. 3. Dependence of the critical current of CORC cable assemblies on the external magnetic field at different temperatures (the dotted line denotes the magnet load curve)

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5. Fig. 4. Magnetic field distribution. A – on the coil, B – in the poloidal cross section

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6. Fig. 5. Dependence of the operational field of the tokamak on temperature for different values of the number of CORC cables in the toroidal coil

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7. Fig. 6. Magnetic field distribution in the poloidal cross-section. A – for an operational field of 1 T, B – for an operational field of 1.5 T

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Copyright (c) 2025 Aleksandrov D.А., Martirosian I.V., Vinitskiy Е.А., Osipov M.А., Pokrovskii S.V.

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