The radiation reaction (beamstrahlung) effect on particle dynamics during interaction of oppositely charged beams is studied. It shown that the beam focusing can be strongly enhanced due to beamstrahlung. An approximate analytical solution motion equations including force derived. disruption parameter calculated for classical and quantum regime model verified by QED-PIC simulations. head-on col...

We find the conditions for optimal collimator location by the method of “Lagrange undetermined multipliers”. We give a ‘global’ explanation for the advantage of tune splitting on betatron collimation in terms of the envelope of all possible optimal collimator positions. We make analytic calculations of the maximum amplitude of surviving particles for elliptic and jaw-type collimators at a varie...