Polarization of coherent synchrotron radiation from an electron beam rotating in a plasma |
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Authors: | David Tzach Robert Buschauer Gregory Benford |
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Affiliation: | (1) Department of Physics, University of California, 92717 Irvine, California |
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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.Work supported by Army Research Office. |
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Keywords: | electron beam plasma coherent polarization collective |
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