1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

The coherent stability diagram of scaling FFAs

MOPS006
2 Jun 2025, 16:00
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC1.A12 Fixed Field Accelerators (FFAs) Monday Poster Session

Speaker

David Kelliher (Science and Technology Facilities Council)

Description

Fixed Field Accelerators (FFAs) are a promising candidate for future high intensity machines such as ISIS-II. It follows that the largely unexplored topic of coherent transverse beam instabilities in these machines is of increasing importance. Transverse instabilities, such as head-tail, can be mitigated in synchrotrons by adjusting the chromaticity appropriately. However, in scaling FFAs, the chromaticity is fixed at zero by design. On the other hand, the relatively strong tune shift with amplitude caused by the nonlinear field of FFA magnets provides a source of Landau damping. Here we evaluate the resulting stability region in the complex tune shift plane comparing an analytical prediction based on the extracted detuning with amplitude with the results from numerical tracking simulations. Hence, the impedance threshold of FFAs can be established.

Region represented Europe
Paper preparation format LaTeX

Author

David Kelliher (Science and Technology Facilities Council)

Co-authors

Adrian Oeftiger (GSI Helmholtz Centre for Heavy Ion Research) Carl Jolly (Science and Technology Facilities Council)

Presentation materials

There are no materials yet.