Physics:Mirnov oscillations

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Short description: Magnetic field fluctuations in an ionised gas

Mirnov oscillations (a.k.a. magnetic oscillations) are amplitude perturbations of the magnetic field in a plasma. It is named after Sergei V. Mirnov who designed a probe to measure these oscillations in 1965.[1] The probe name is Mirnov coil.

Mirnov oscillations have been extensively studied in tokamaks[2][3][4][5] as they provide information about the plasma instabilities that occur within the system.[6][7][8] The instabilities create local fluctuations in the current which induce a varying magnetic flux density, and are picked up by the coils due to Faraday's law of induction.

References

  1. ↑ Mirnov, S. V. (1965). "A probe method for measuring the displacement of the current channel in cylindrical and toroidal discharge vessels" (in en). Journal of Nuclear Energy C 7 (3): 325–328. doi:10.1088/0368-3281/7/3/112. ISSN 0368-3281. 
  2. ↑ McGuire, K.; Hammett, G. (1982) (in en). Analysis of Mirnov oscillations on PDX. http://inis.iaea.org/Search/search.aspx?orig_q=RN:13701258. 
  3. ↑ Tan, I. H.; Caldas, I. L.; Nascimento, I. C.; Silva, R. P. Da; Sanada, E. K.; Bruha, R. (1986). "Mirnov Oscillations in a Small Tokamak". IEEE Transactions on Plasma Science 14 (3): 279–281. doi:10.1109/TPS.1986.4316542. ISSN 0093-3813. Bibcode: 1986ITPS...14..279T. 
  4. ↑ Kikuchi, M. (1986). "A note on the Mirnov signal analysis in tokamaks" (in en). Nuclear Fusion 26 (1): 101–107. doi:10.1088/0029-5515/26/1/009. ISSN 0029-5515. https://digital.library.unt.edu/ark:/67531/metadc1085941/. 
  5. ↑ Raju, D.; Jha, R.; Kaw, P. K.; Mattoo, S. K.; Saxena, Y. C.; Team, Aditya (2000-11-01). "Mirnov coil data analysis for tokamak ADITYA" (in en). Pramana 55 (5): 727–732. doi:10.1007/s12043-000-0039-8. ISSN 0973-7111. Bibcode: 2000Prama..55..727R. 
  6. ↑ Glasser, A. H.; Greene, J. M.; Johnson, J. L. (1975) (in en). Resistive instabilities in a tokamak. doi:10.2172/4183368. https://digital.library.unt.edu/ark:/67531/metadc865177/. 
  7. ↑ Mirnov, S. V.; Semenov, I. B. (1971). "Investigation of the instabilities of the plasma string in the Tokamak-3 system by means of a correlation method" (in en). Soviet Atomic Energy 30 (1): 22–29. doi:10.1007/BF01788387. ISSN 1573-8205. 
  8. ↑ Schittenhelm, M.; Zohm, H. (1997). "Analysis of coupled MHD modes with Mirnov probes in ASDEX Upgrade" (in en). Nuclear Fusion 37 (9): 1255–1270. doi:10.1088/0029-5515/37/9/I06. ISSN 0029-5515. Bibcode: 1997NucFu..37.1255S. 





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