Speaker
Dr
Weidong Chen
Description
To meet the 500kW beam power requirement of China spallation neutron source project Phase-II (CSNS-II), an external antenna RF-driven negative hydrogen ion source has been developed. It has been put into commissioning on China spallation neutron source (CSNS) accelerator since September of 2021. In the last two run cycles, it has operated for 315 days and 323 days respectively, with 100% availability. This report covers the recent research and development of the RF-driven H$^-$ source and low energy beam transport (LEBT) designed for CSNS-II. A featured function of the LEBT is the electrostatic beam chopping. The influence of chopping electric field to the space charge compensation is also experimentally studied.
