Design and Optimization of the CLIC Positron Source from the Target to Damping Ring

The CLIC Positron source has been designed to produce non-polarized positron beams using a hybrid target composed of a crystal followed by an amorphous target. After production, positrons are captured and accelerated to 200 MeV in the pre-injector linac and subsequently accelerated further up to 2.86 GeV in the injector linac. At this point they enter the pre-damping ring and afterwards the main damping ring to obtain the necessary beam quality for a linear collider. In this thesis, we have designed and optimized the beam transport and acceleration from the target to the pre-damping ring which has a limiting transverse and longitudinal acceptance. The goal of the thesis is to maximize the positron yield accepted by the pre-damping ring.