Abstract In the framework of Circular Electron Positron Collider (CEPC) project, self-consistent analytic and numeric design of 177 MW power electron beam generation, beam transportation and then beam dumping to be used for 80 MW Radio Frequency (RF) output power generation at C-band frequency of 5.712 GHz is planned for a linear accelerator (LINAC). This work describes the development and status of this device, covering mechanistic design aspects and their significance on product functionalities. Using CST Particle Studio, the beam is thoroughly monitored and transported under a confined magnetic focusing field with 170 MW injection power to the RF interface at 410 keV beam energy, followed by its collection for the heat load analysis. The heat-dissipated power density distribution on the collector is related to the transverse beam energy, which is optimized to a lower value by terminating the magnetic field immediately after entering the collector. At a full beam power without RF drive, heat load corresponds to a maximum temperature of 83 °C on the collectors’ interior surface with a water heat transfer coefficient of 5000 W/m 2 .K. The temperature is further reduced to 66.50 °C with an optimized design of surface heat exchanger at collector’s exterior surface. The electron gun, beam focusing magnet, and the collector meet the requirements of the RF beam dynamics for 80 MW RF output power, successfully with 45% efficiency.
Iqbal et al. (Mon,) studied this question.