IPAC'24 - 15th International Particle Accelerator Conference

Vertical beam halo characterisation at the ESRF EBS for operation with reduced in vacuum undulator gap

TUCN1

21 May 2024, 15:00

20m

Room 104 (Music City Center)

Contributed Oral Presentation MC2.A05 Synchrotron Radiation Facilities TUCN: Photon Sources and Electron Accelerators (Contributed)

Speaker

Nicola Carmignani (European Synchrotron Radiation Facility)

Description

The vertical beam halo is the main limitation for very low gap operation of in-vacuum undulators at the ESRF EBS. The vertical halo is due to Touschek electrons with large energy deviation crossing some betatron resonances. The crossing of the resonances can transfer horizontal momentum to vertical momentum. The beam halo has been characterized and measured and different low halo optics have been studied and tested to allow the operation of the machine with lower in-vacuum undulator gaps.