Speaker
Description
For the high intensity proton accelerator, the laser-assisted H⁻ stripping is a new essential technology. It can be an alternative to the foil stripping which may be used to overcome various difficulties faced by the stripping foils, such as short lifetime, high temperature, large radiation dose, etc. In this paper, based on the second phase of China Spallation Neutron Source (CSNS-II), the progress of the laser-assisted H⁻ stripping injection has been studied in depth. First, the physical principle of laser-assisted H⁻ stripping injection is deeply explored theoretically. The influencing factors of laser and H⁻ beam interaction, Lorentz stripping and other processes are studied. Second, the influences of injection beam parameters on the Lorentz stripping and laser excitation are studied, and the emittance growth of injection beam after stripping is explored. Thirdly, a stripping magnet prototype has been completed, and its magnetic measurement results as well as future technical improvements will be presented in detail. Finally, following in-depth simulation studies, the optical path design for the laser system has been finalized, and certain optical parameter tests are presently being conducted.