Abstract
After eliminating reflections from the walls of the plasma container, we observed polarization of the coherent synchrotron radiation from a relativistic electron beam rotating in a plasma. Several features of the polarization agree well with calculations based on the single particle synchrotron radiation theory. A particular polarization ratio (Fig. 3) does not, however. We deduce from this direct diffraction of the radiation by the beam electrons. This is strong evidence for beam-particle bunches of size ∼cm. Also, there must be some absorption of the extraordinary wave to account for the observations. We suggest a way to apply these results to measure the pitch angle of the beam.
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Work supported by Army Research Office.
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Tzach, D., Buschauer, R. & Benford, G. Polarization of coherent synchrotron radiation from an electron beam rotating in a plasma. Int J Infrared Milli Waves 2, 71–82 (1981). https://doi.org/10.1007/BF01007471
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DOI: https://doi.org/10.1007/BF01007471