Light depolarization and line broadening by a magnetic microfield in plasmas

Two methods to measure the magnetic microfields in plasmas are suggested and studied. The first method studies the broadening of radiative electron transitions in atoms and ions without the change of the principle quantum number. In this case, the line broadening due to the Zeeman effect may exceed the Doppler and Stark broadening. The second method uses the effect of depolarization of a linearly polarized laser radiation while propagating through the magnetized plasma. This depolarization may be sufficiently strong far optical radiation.