Speaker
Description
During the beam power upgrade of the Rapid Cycling Synchrotron (RCS) of the China Spallation Neutron Source (CSNS), 16 additional trim quadrupoles were installed for beam optics correction. However, they are relatively close to the nearby main quadrupole magnets, resulting in a strong field interference effect. The interference causes a serious distortion of the lattice parameters and can lead to significant beam loss for high-intensity beams. In this paper, firstly, the three-dimensional electromagnetic field software OPERA is used for simulation, and the magnetic field integral changes are accurately calculated. Then, a systematic analysis was conducted on the effects of integrated magnetic field variations on both the betatron tune and beta function using the accelerator physics calculation software MADX. Additionally, the multi-particle tracking software pyORBIT is utilized to simulate beam loss. The results show that the original lattice parameters are distorted and beam loss is significantly increased by this effect. To obtain accurate magnetic field interference data, indirect measurements were performed employing the orbit response matrix method. Experimental results demonstrate remarkable consistency with numerical simulations. On this basis, beam compensation experiments are carried out and beam loss is successfully reduced.
| In which format do you inted to submit your paper? | LaTeX |
|---|---|
| Preprint marking on your proceeding paper | I do not wish my paper to be marked as preprint. |
| I no longer wish to present this contribution, please withdraw it. | Keep my contribution |