Skip to main content
Open Access Publications from the University of California

Transient beam loading in the ALS harmonic RF system


We report on the commissioning of a higher harmonic radiofrequency system at the Advanced Light Source, designed to improve the beam lifetime. We have achieved an increase above a factor of two in our best results up to now. Transient beam loading of the harmonic cavities, due to the unequal fill patterns, creates the greatest limitation on lifetime improvement. We also describe several interesting effects on the operation of the longitudinal and transverse multibunch feedback system.

Main Content
For improved accessibility of PDF content, download the file to your device.
Current View