Tracking Simulations and Optimization of the CLIC Injector Linac

Abstract

The CLIC positron source has been designed to produce non-polarized positrons for the first stage of CLIC at 380 GeV. In the CLIC positron source, the injector linac is supposed to accelerate positron beams and electron beams simultaneously from 200 MeV after the pre-injectors up to the damping ring energy of 2.86 GeV. The optics design of the injector linac has been done for the positrons since the emittance of the positron beam is much larger compared to the electron beam. This study presents new particle tracking simulations and an optimization of the CLIC injector linac for the positrons. In addition, beam offset and quadrupole misalignment errors have been investigated in the CLIC injector linac.