Simulation of the Beam-Beam Effect during Injection, Accumulation and Acceleration in LEP

The beam-beam program is used to simulate noncollision conditions for LEP. These results are used to facilitate the choice between horizontal and vertical separations at the interaction points and to quantify the required amount of separations. It is shown that in certain cases the residual beam-beam kicks during injection with separated beams can cause severe ´blow-up´ in the transverse beam emittance and thereby lead to a reduction in the apparent injection efficiency. Results are also shown for transient effects which occur while the beams are brought into collision.