INJECTOR DESIGN FOR THE 4GLS ENERGY RECOVERY LINAC PROTOTYPE

Abstract

Daresbury Laboratory has been given funding for the construction of an Energy Recovery Linac Prototype (ERLP) that operates at an electron beam energy of up to 35 MeV and drives an infra-red FEL. The ERLP serves as a test-bed for the study of beam dynamics and accelerator technology important for the design and construction of the proposed 4th Generation Light Source (4GLS). A key component of the ERLP is the high-brightness injector. The injector consists of a DC photocathode gun, a single-cell buncher cavity, a super-conducting booster and a transfer line to the main linac. In this paper, the design of the ERLP injector from the DC photocathode gun to the exit of the booster is discussed. The performance of the injector has been studied using the particle tracking code ASTRA.