It follows from Eq. 1.7.1 that the synchrotron loss for protons and nuclei is many orders (13^14) lower than that for electrons at the same energies E. The electron synchrotron losses proves in many cases to be significant. A relativistic electron with energy E moving in a magnetic field with component H± (which is perpendicular to the electron's velocity) emits electromagnetic waves predominantly in the direction of its instantaneous velocity within a narrow cone of angle 6 ~ mc2/E << 1. In each direction in the orbital plane within a time 2nE/ceH1 the radiation bursts will arise, each of duration rj6
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