IPAC'24 - 15th International Particle Accelerator Conference

Mitigation of beam coupling impedance for the wire scanners in the CERN Super Proton Synchrotron

THPC51

23 May 2024, 16:00

2h

Country (MCC Exhibit Hall A)

Poster Presentation MC5.D04 Beam Coupling Impedance Theory, Simulations, Measurements, Code Development Thursday Poster Session

Speaker

Christine Vollinger (European Organization for Nuclear Research)

Description

The beam wire scanners of the CERN Super Proton Synchrotron (SPS) experienced multiple failures of their carbon wires caused by the high-intensity beam during a very short period in April 2023. Different modifications of the existing instrument were therefore studied to reduce the beam-induced power without compromising its functionality nor negatively affecting the beam coupling impedance. Amongst these options were the implementation of ferrite absorbers, a change of the scanner mechanism and the installation of an RF coupler in the vacuum tank. In this paper, we introduce the electromagnetic simulation results for the installed ferrite loads and the RF coupler, as well as their impact on the on-axis beam impedance. The final improvement for the configuration to be installed during the end-of-year stop of the accelerator will be summarized.

Funding Agency

CERN