Abstract
THE suggestion by Askaryan1 that a detectable radio pulse should be emitted by an extensive air shower was based on the coherent emission from a negative charge excess in the shower front. A more detailed analysis by Kahn and Lerche2 showed that a radio pulse may also be emitted by the transverse current in the shower front which results from separation of charges in the Earth's magnetic field. Using a restricted model of the shower, consisting of a ring of charges, they showed that the radiation resulting from separation of charges would be expected to dominate over that from an excess of charges.
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References
Askaryan, G. A., J. Exp. Theor. Phys., 14, 441 (1962).
Kahn, F. D., and Lerche, I., Proc. Roy. Soc., A, 289, 206 (1966).
Jelley, J. V., Smith, F. G., Porter, N. A., Weekes, T. C., Porter, R. A., Charman, W. N., Fruin, J. H., and McBreen, B., Nuovo Cimento (in the press).
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Borchovski, I. A., Volovik, V. D., Kobizky, V. I., and Shmaleto, E. S., J.E.T.P. Letters, 19, 415 (1966).
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PORTER, R., SMITH, F. & TORBITT, W. An Experimental Test of the Mechanism of Radio Emission from Cosmic Ray Showers. Nature 213, 1107 (1967). https://doi.org/10.1038/2131107a0
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DOI: https://doi.org/10.1038/2131107a0
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