IPAC'23 - 14th International Particle Accelerator Conference

Phase space control of transverse resonance island buckets at CESR

WEPL093

10 May 2023, 16:30

2h

Sala Laguna

Poster Presentation MC5.D02: Non linear Single Particle Dynamics Resonances, Tracking, Higher Order, Dynamic Aperture, Code Deve Wednesday Poster Session

Speaker

Suntao Wang (Cornell University (CLASSE))

Description

Transverse resonance island buckets (TRIBs) have been successfully observed at the Cornell Electron Storage Ring (CESR) after optimizing the distribution of seventy-six sextupoles to achieve the desired amplitude-dependent tune shift and the resonant driving term near a third-order resonant line (3vx=2). A novel knob is created to adjust the resonant driving term h22000 while minimizing the change of h30000. Interestingly found from simulation, the knob can change the TRIBs locations in the phase space, which is then confirmed experimentally at CESR. Theoretical calculation of the fixed points (stable and unstable) in the phase plots are explored with PTC, which shows excellent agreement with the tracking results and provides theoretical understanding of the TRIBs in the phase space. In addition, the island locations in the real x-y space are explored by adjusting a skew quadrupole to change the x-y coupling.

Funding Agency

Work supported by NSF PHYS-1757811 and DMR-1829070