Initial results from the Helios-1 Search-coil Magnetometer experiment

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F.M. Neubauer
H.J. Beinroth
H. Barnstorf
G. Dehmel


The Helios search-coil magnetometer experiments provide a unique potential for studies of electromagnetic plasma wave modes in the solar wind between 0.3–1 A.U. because of excellent background noise levels, high time-resolution and high accuracy. Daily average spectral densities (γ √Hz) in the frequency range from 4.7–220 Hz show a pronounced increase as the sun is approached with complex superposed variations. Their values have a range of more than an order of magnitude. The shock of January 6, 1975 provides an interesting example for the use of high time-resolution spectral data. The fine structure and the long term variations in wave fields after the perpendicular shock are discussed. Also two interesting examples of "magnetic holes" are presented.

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Neubauer, F., Beinroth, H., Barnstorf, H., & Dehmel, G. (1976). Initial results from the Helios-1 Search-coil Magnetometer experiment. Journal of Geophysics, 42(1), 599-614. Retrieved from


Dehmel, G., Neubauer, F.M., Lukoschus, D., Wawretzko, J., Lammers, E. (1975) Das InduktionsspulenMagnetometer-Experiment (E4). Raumfahrtforschung. 19:241-244

Galeev, A.A. (1976) Collisionless shocks. In: Williams, D.J. (Ed.) Relationships, Proc. Symp. on Solar Planet., Boulder

Gary, S.P., Gerwin, R.A., Forslund, D.W. (1976) Electromagnetic current instabilities. Phys. Fluids, 19:579-586

Hollweg, J.V. (1975) Waves and instabilities in the solar wind. Rev. Geophys. Space Phys. 13:263-289

Lemaire, J.F., Burlaga, L.F. (1976) Diamagnetic boundary layers in the solar wind: kinetic theory. Submitted to Astrophys. Space Sci.

Neubauer, F.M., Musmann, G., Dehmel, G. (1977) Fast magnetic fluctuations in the solar wind: Helios I. Accepted by J. Geophys. Res.

Russell, C.T., Childers, D.D., Coleman, P.J. (1971) Ogo 5 observations of upstream waves in the interplanetary medium: discrete wave pachets. J. Geophys. Res. 76:845-861

Schindler, K. (1969) Laboratory experiments related to the solar wind and the magnetosphere. Rev. Geophys. :51-75

Smith, E.J. (1973) Identification of interplanetary tangential and rotational discontinuities. J. Geophys. Res., 78:2054-2063

Sonnerup, B.U.O., Cahill, Jr., L.J. (1967) Magnetopause structure and attitude from Explorer 12 observations, J. Geophys. Res. 72:171-183

Turner, J.M., Burlaga, L.F., Ness, N.F., Lemaire, J.F. (1976) Magnetic holes in the solar wind, EOS. Trans. Am. Geophys. Union 57:320