Tearing mode

In plasma physics, a tearing mode is a plasma instability characterized by field line reconnection and the formation of magnetic islands.^[1]^[2] With islands emerging in the plasma, particles and heat can move from regions that were originally disconnected. Pressure and current density profiles are flattened, causing disruptions.^[3] The typical timescale for the growth of a tearing mode the order of 10⁻¹ microsec.^[4]^[5]^[6]

Types of Tearing mode

Rayleigh–Taylor instability
Magnetic reconnection
Ballooning instability
Resistive ballooning mode
Universal instability
Kelvin–Helmholtz instability
Disruption instability ^[7]
Edge-localized mode
Transport barrier mode

References

^ "TEARING MODE DYNAMICS IN TOKAMAK PLASMAS". farside.ph.utexas.edu. Retrieved 2024-08-06.
^ Zohm, Hartmut (2015). Magnetohydrodynamic Stability of Tokamaks. Wiley-VCH. pp. 123–157. ISBN 978-3-527-41232-7.
^ Zohm, Hartmut (2015). Magnetohydrodynamic Stability of Tokamks. Wiley-VCH. pp. 159–173. ISBN 978-3-527-41232-7.
^ Seo, Jaemin; Kim, SangKyeun; Jalalvand, Azarakhsh; Conlin, Rory; Rothstein, Andrew; Abbate, Joseph; Erickson, Keith; Wai, Josiah; Shousha, Ricardo; Kolemen, Egemen (February 2024). "Avoiding fusion plasma tearing instability with deep reinforcement learning". Nature. 626 (8000): 746–751. Bibcode:2024Natur.626..746S. doi:10.1038/s41586-024-07024-9. ISSN 1476-4687. PMC 10881383. PMID 38383624.
^ Shi, Chen; Velli, Marco; Pucci, Fulvia; Tenerani, Anna; Innocenti, Maria Elena (2020-10-01). "Oblique tearing mode instability: guide field and Hall effect". The Astrophysical Journal. 902 (2): 142. arXiv:2007.00607. Bibcode:2020ApJ...902..142S. doi:10.3847/1538-4357/abb6fa. ISSN 0004-637X.
^ Connor, J. W.; Cowley, S. C.; Hastie, R. J.; Hender, T. C.; Hood, A.; Martin, T. J. (March 1988). "Tearing mode". The Physics of Fluids. 31 (3): 577–590. doi:10.1063/1.866840.
^ Galishnikova, Alisa K.; Kunz, Matthew W.; Schekochihin, Alexander A. (2022-12-09). "Tearing Instability and Current-Sheet Disruption in the Turbulent Dynamo". Physical Review X. 12 (4): 041027. arXiv:2201.07757. Bibcode:2022PhRvX..12d1027G. doi:10.1103/PhysRevX.12.041027.

[1] "TEARING MODE DYNAMICS IN TOKAMAK PLASMAS". farside.ph.utexas.edu. Retrieved 2024-08-06.

[2] Zohm, Hartmut (2015). Magnetohydrodynamic Stability of Tokamaks. Wiley-VCH. pp. 123–157. ISBN 978-3-527-41232-7.

[3] Zohm, Hartmut (2015). Magnetohydrodynamic Stability of Tokamks. Wiley-VCH. pp. 159–173. ISBN 978-3-527-41232-7.

[4] Seo, Jaemin; Kim, SangKyeun; Jalalvand, Azarakhsh; Conlin, Rory; Rothstein, Andrew; Abbate, Joseph; Erickson, Keith; Wai, Josiah; Shousha, Ricardo; Kolemen, Egemen (February 2024). "Avoiding fusion plasma tearing instability with deep reinforcement learning". Nature. 626 (8000): 746–751. Bibcode:2024Natur.626..746S. doi:10.1038/s41586-024-07024-9. ISSN 1476-4687. PMC 10881383. PMID 38383624.

[5] Shi, Chen; Velli, Marco; Pucci, Fulvia; Tenerani, Anna; Innocenti, Maria Elena (2020-10-01). "Oblique tearing mode instability: guide field and Hall effect". The Astrophysical Journal. 902 (2): 142. arXiv:2007.00607. Bibcode:2020ApJ...902..142S. doi:10.3847/1538-4357/abb6fa. ISSN 0004-637X.

[6] Connor, J. W.; Cowley, S. C.; Hastie, R. J.; Hender, T. C.; Hood, A.; Martin, T. J. (March 1988). "Tearing mode". The Physics of Fluids. 31 (3): 577–590. doi:10.1063/1.866840.

[7] Galishnikova, Alisa K.; Kunz, Matthew W.; Schekochihin, Alexander A. (2022-12-09). "Tearing Instability and Current-Sheet Disruption in the Turbulent Dynamo". Physical Review X. 12 (4): 041027. arXiv:2201.07757. Bibcode:2022PhRvX..12d1027G. doi:10.1103/PhysRevX.12.041027.

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