Classical Radiation Processes in the Weizsacker-Williams Approximation
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The main features of radiation by relativistic electrons are well approximated in the Weizsacker-Williams method of virtual quanta. This method is best known for its application to radiation during elementary particle collisions, but is equally useful in describing "classical" radiation emitted during the interaction of a single relativistic electron with an extended system, such as synchrotron radiation, undulator radiation, transition radiation and Cerenkov radiation.
v2 adds one reference; thanks to Desmond Barber. v4 adds a reference to Spencer Klein (thanks Spencer), and improves the discussion of synchrotron radiation near the critical frequency, and of the transverse extent of the medium required for Cerenkov radiation. v5 mistakenly restored the version 3. v6 is the same as v4
v2 adds one reference; thanks to Desmond Barber. v4 adds a reference to Spencer Klein (thanks Spencer), and improves the discussion of synchrotron radiation near the critical frequency, and of the transverse extent of the medium required for Cerenkov radiation. v5 mistakenly restored the version 3. v6 is the same as v4