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Power per unit solid angle, spectrum and polarization as a function of angle, and integrated spectrum are calculated for the radiation from a beam of ultrarelativistic (γ1) charged particles in a magnet causing a deflection much smaller than Iγ, with an arbitrary form of the magnetic field $B(z)$. Some examples are given, and the connection with the "edge effect" is shown.
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R. Coı̈sson (1979) studied this question.
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