Skip to main content

Advertisement

We’d like to understand how you use our websites in order to improve them. Register your interest.

Fast compression of a current sheet during externally driven magnetic reconnection

Abstract

Magnetic reconnection of two toroidal plasmas with arbitrary q values revealed a dependence of sheet-current dissipation and ion heating on ion-gyromotion. Effective sheet-current resistivity was found to increase significantly, when an external force compressed the current sheet shorter than the ion-gyroradius, and both the reconnection speed and ion temperature increased with decreasing current sheet width and with increasing ion-gyroradius.

References

  1. Balandin, A. et al., Design study of 3-D tomography diagnostics for spherical tokamaks, Eur. Phys. J., D14, 97–103, 2001.

  2. Biskamp, D., Magnetic reconnection via current sheets, Phys. Fluids, 29, 1520–1531, 1986.

  3. Gekelman, W. and H. Pfister, Experimental observations of the tearing of an electron current sheet, Phys. Fluids, 31, 2017–2025, 1988.

  4. Horiuchi, R. and T. Sato, Particle simulation study of collisionless driven reconnection in a sheared magnetic field, Phys. Plasmas, 4, 277–289, 1997.

  5. Inomoto, M. et al., Mechanism of fast reconnection in TS-3 plasma merging experiment, in Proc. MR2000, p. 23, Univ. Tokyo, Japan, Mar., 2000.

  6. Ji, H. et al., Experimental test of the Sweet-Parker model of magnetic reconnection, Phys. Rev. Lett., 80, 3256–3259, 1998.

  7. Leboeuf, J. N., T. Tajima, and J. M. Dawson, Dynamic magnetic X-point, Phys. Fluids, 25, 784–798, 1982.

  8. Morita, A. et al., Tomotraphic reconstruction algorithm for an annular cross section of toroidal plasmas by use of modified Fourier-Bessel expansions, Trans. Inst. Electr. Eng. Japan, 115, 37–43, 1995.

  9. Murata, Y. et al., Bulletin of American Physical Society 45, 7, YP1 53, 2000.

  10. Ono, Y., A. Morita, M. Katsurai et al., Experimental investigation of three-dimentional magnetic reconnection by use of two colliding spheromaks, Phys. Fluids, B5, 3691–3701, 1993.

  11. Ono, Y., et al., Ion acceleration and direct ion heating in three-component magnetic reconnection, Phys. Rev. Lett., 86, 3328–3331, 1996.

  12. Parker, E. N., Mechanism for merging magnetic fields in conducting fluids, J. Geophys. Res., 62, 509–520, 1957.

  13. Saito, Y., et al., Slow-mode shocks in magnetotail, J. Geophys. Res., 100, 23567–23581, 1995.

  14. Sato, T. and T. Hayashi, Exterally driven reconnection and a powerful magnetic energy converter, Phys. Fluids, 22, 1189–1202, 1979.

  15. Sato, T., T. Hayashi, K. Watanabe et al., Role of compressibility on driven magnetic reconnection, Phys. Fluids B, B4, 450–457, 1992.

  16. Scime, E. et al., Ion heating and magnetohydrodynamic fluctuations in the reversed-field pinch, Phys. Fluids, 4, 4062–4071, 1992.

  17. Shay, M. A. et al., Structure of the dissipation region during collisionless magnetic reconnection, J. Geophys. Res., 103, 9165–9176, 1998.

  18. Shimizu, T., S. Tsuneta, and A. C. Acton, Morphology of active region transient brightenings with the YOHKOH soft X-ray telescope, Astrophys. J., 422, 906–911, 1994.

  19. Stenzel, R. et al., Magneticfield line reconnection experiments4. resistivity, heating and energy flow, J. Geophys. Res., 87, 111–117, 1982.

  20. Sweet, P. A., The neutral point theory of solar flares, in Electromagnetic Phenomena in Cosmical Physics, edited by B. Larnert, p.123, Cambridge, New York, 1953.

  21. Tajima, T. and J.-I. Sakai, Explosive coalescence of magnetic islands and acceleration of changed particles, Sov. J. Plasma Phys., 15, 519–525, 1989.

  22. Treumann, R. A. and W. Baumjohann, Advanced Space Plasma Physics, Imperial College Press, 1997.

  23. Tsuneta, S., Interacting active regions in the solar corona, Astrophys. J., 456, L63–L65, 1996.

  24. Ugai, M., Computer studies on development of the fast reconnection mechanism for different resistivity model, Phys. Fluids, B4, 2953–2963, 1992.

  25. Ugai, M., Computer studies on fast reconnection mechanism under an externally driven boundary condition, Phys. Plasmas, 1, 2853–2863, 1994.

  26. Yamada, M., et al., Identification of Y-shaped and O-shaped diffusion regions during magnetic reconnection in a laboratory plasma, Phys. Rev. Lett., 78, 3117–3120, 1997.

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Y. Ono.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Ono, Y., Inomoto, M., Ueda, Y. et al. Fast compression of a current sheet during externally driven magnetic reconnection. Earth Planet Sp 53, 521–526 (2001). https://doi.org/10.1186/BF03353264

Download citation

Keywords

  • Current Sheet
  • Magnetic Reconnection
  • Reconnection Rate
  • Effective Resistivity
  • Fast Reconnection