Hard undulator radiation in an inverse medium |
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| Authors: | N A Korkhmazyan N N Korkhmazyan and N E Babadjanyan |
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| Institution: | (1) Department of Physics, Wellesley College, 106 Central Street, 02481 Wellesley, MA, USA;(2) Harvard-Smithsonian Center for Astrophysics, Harvard University, 60 Garden Street, 02138 Cambridge, MA, USA |
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| Abstract: | X-ray radiation from fast electrons in undulators filled with an inverse medium is studied. A formula for the spectral density of the number of photons is derived. The intensity zeroth harmonics, as well as the intensity of radiation in zero undulator field, are described by the Tamm-Frank formula for Cherenkov radiation. It is shown that the spectral density of emitted photons in a wavelength range of λ ? 0.4–2.0 Å in such a medium can be increased by four orders of magnitude as compared to the radiation intensity in a vacuum undulator. The energy of emitted electrons in the former case must be in an interval of 5-2 GeV, while electrons with an energy of 14-6 GeV are required in vacuum undulators. |
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