IPAC'24 - 15th International Particle Accelerator Conference

Fringe field maps for transverse gradient bending magnets with curved poles

MOPS01

20 May 2024, 16:00

2h

Blues (MCC Exhibit Hall A)

Poster Presentation MC5.D02 Nonlinear Single Particle Dynamics Resonances, Tracking, Higher Order, Dynamic Aperture, Code Developments Monday Poster Session

Speaker

Michael Borland (Argonne National Laboratory)

Description

We present second-order fringe maps for gradient dipoles whose poles are curved to follow the reference orbit. While some of the results have been previously found, we find new contributions including soft-edge linear terms that can be significant for gradient dipoles. In addition, we depart from previous works by writing all soft-edge corrections in terms of integrals along the particle trajectory; this appears to be required for dipoles with strong transverse gradients. We have added the fringe model to the CSBEND element in the tracking code ELEGANT*, and we compare the fringe map predictions to those of field-map tracking for several transverse gradient dipoles used in the APS-Upgrade.

Footnotes

• M. Borland, APS LS-287 (2000)

Funding Agency

Work supported by the U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.