Özet:

The ordinary bremsstrahlung ep \rightarrow epg can be used at the linac-ring ep colliders for luminosity measurement. It is known that at high energies this process has a large correction due to beam-size effect. We have calculated this effect for ep colliders of the linac-ring type. For the LHC+CLIC collider the correction exceeds 10% for Eg < 0.95\;Ee. As a rule, the bremsstrahlung of protons in the ep scattering is not considered due to its small cross section. However, if the photon energy Eg becomes small enough, the number of produced photons become large because in this case the radiation is determined by the interaction of a proton with the collective electromagnetic field of the electron bunch. It is coherent bremsstrahlung (CBS). We present the main characteristics of CBS calculated for linac-ring ep colliders. At the LHC+CLIC collider it should be about 1700 \; dE\gamma /E\gamma photons for a single collision of bunches at E\gamma \stackrel{

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