Mirnov oscillations explained

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.

Notes and References

1. Mirnov. S. V.. 1965. A probe method for measuring the displacement of the current channel in cylindrical and toroidal discharge vessels. Journal of Nuclear Energy C. en. 7. 3. 325–328. 10.1088/0368-3281/7/3/112. 0368-3281.
2. McGuire. K.. Hammett. G.. 1982. Analysis of Mirnov oscillations on PDX. en.
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. 10.1109/TPS.1986.4316542. 0093-3813. 1986ITPS...14..279T. 12920335.
4. Kikuchi. M.. 1986. A note on the Mirnov signal analysis in tokamaks. Nuclear Fusion. en. 26. 1. 101–107. 10.1088/0029-5515/26/1/009. 122502537 . 0029-5515.
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. Pramana. en. 55. 5. 727–732. 10.1007/s12043-000-0039-8. 0973-7111. 2000Prama..55..727R. 120615200.
6. Alan Herbert Glasser. Glasser. A. H.. Greene. J. M.. Johnson. J. L.. 1975. Resistive instabilities in a tokamak. 10.2172/4183368. en. 4183368.
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. Soviet Atomic Energy. en. 30. 1. 22–29. 10.1007/BF01788387. 124432349. 1573-8205.
8. Schittenhelm. M.. Zohm. H.. 1997. Analysis of coupled MHD modes with Mirnov probes in ASDEX Upgrade. Nuclear Fusion. en. 37. 9. 1255–1270. 10.1088/0029-5515/37/9/I06. 0029-5515. 1997NucFu..37.1255S. 250784804 .