Study of the TESLA preaccelerator for the polarized beam

In the mainframe of the TESLA Technical Design Report a study of the polarised electron beam preaccelerator has been made. The bunching of electrons delivered by a polarised electron source is described and results of simulations are given. The acceleration of the beam with room temperature cavities and its transport to and through a superconducting linac up to 500 MeV is also studied. The polarised electron source itself is not described. Necessary initial values of beam parameters are only assumed.