Speaker
Ms
Jingtong Du
(IHEP/CSNS)
Description
In high-intensity hadron accelerators, longitudinal space charge effects are non-negligible and can modify the beam spectrum, which can lead to Loss of Landau Damping(LLD). Based on the Hofmann-Pederson distribution model, we obtains the RF voltage amplitude for a matched beam in CSNS-RCS. With the above results, particle-in-cell(PIC) simulations are performed to study the influence of space charge effects on LLD. It is shown in the simulations that the shifts of the dipole mode frequency outside the beam spectrum as space charge intensity increases. The beam response to RF phase modulation and the LLD threshold is investigated under both single and dual harmonic RF systems.
Author
Ms
Jingtong Du
(IHEP/CSNS)
Co-authors
Prof.
Sheng Wang
(IHEP/CSNS)
Yaoshuo Yuan
(IHEP-CSNS)