Beam dynamics studies for a CTF3 proposed injector

A CTF3 drive beam injector for the nominal stage is proposed, which includes thermionic DC gun, three sub-harmonic bunchers (SHBs), one prebuncher, one 6-cell travelling wave buncher and two accelerating structures. Its beam dynamics is simulated by PARMELA. It is shown that all important parameters, e.g. satellite charge, bunch length and normalized transverse emittance can be met with the design goals if about 400 kW RF power for 3 SHBs is available. In addition, the beam dynamics of the injector for the initial stage has been simulated.