Speaker
Description
For the China Spallation Neutron Source (CSNS), the rapid cycling synchrotron (RCS) accumulates and accelerates the injection beam to the design energy of 1.6 GeV and then extracts the high energy beam to the target. The CSNS design beam power on the target is 100 kW, with the capability to upgrade to 500 kW. In February 2020, the beam power on the target had reached the design value of 100 kW. In March 2024, through various performance improvements and in-depth beam commissioning, the beam power on the target was increased to 160 kW. During the beam commissioning process, the beam loss caused by space charge effects was the most significant factor limiting the increase in beam power. Additionally, unexpected collective effects were observed, including coherent oscillations, after the beam power reached 50 kW. Through a series of improvements, the space charge effects and collective instabilities causing beam loss were effectively controlled. In this paper, the key beam issues during the beam commissioning for the CSNS RCS will be studied in detail and their suppression methods will be given.
Funding Agency
This work is jointly supported by the National Natural Science Foundation of China (No. 12075134) and the Guangdong Basic and Applied Basic Research Foundation (No. 2021B1515120021).
| I have read and accept the Privacy Policy Statement | Yes |
|---|
