  We analyze the impact of the carrier envelope phase on the differential cross
sections of the Breit-Wheeler and the generalized Compton scattering in the
interaction of a charged electron (positron) with an intensive ultra-short
electromagnetic (laser) pulse. The differential cross sections as a function of
the azimuthal angle of the outgoing electron have a clear bump structure, where
the bump position coincides with the value of the carrier phase. This effect
can be used for the carrier envelope phase determination.
