Evaluation of Magnetic Helicity in Homogeneous Turbulence





Citation of Original Publication

Matthaeus, William H., Melvyn L. Goldstein, and Charles Smith. “Evaluation of Magnetic Helicity in Homogeneous Turbulence.” Physical Review Letters 48, no. 18 (May 3, 1982): 1256–59. https://doi.org/10.1103/PhysRevLett.48.1256.


This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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A technique is presented for the measurement of magnetic helicity from values of the two-point magnetic-field correlation matrix under the assumption of spatial homogeneity. Knowledge of a single scalar function of space, derivable from the correlation matrix, suffices to determine the magnetic helicity. The technique is illustrated by a report of the first measurement of the magnetic helicity of the solar wind.