Paper |
Title |
Page |
WEPFI006 |
Broad and Narrow Band Feedback Systems at ELSA |
2714 |
|
- M. Schedler, F. Frommberger, P. Hänisch, W. Hillert, C. Reinsch
ELSA, Bonn, Germany
|
|
|
At the Electron Stretcher Facility ELSA of Bonn University, an upgrade of the maximum stored beam current from 20 mA to 200 mA is planned. The storage ring operates applying a fast energy ramp of 6 GeV/s from 1.2 GeV to 3.5 GeV. The intended upgrade is mainly limited due to the excitation of multibunch instabilities. As a countermeasure, we succesfully commissioned state-of-the-art bunch by bunch feedback systems in the longitudinal and the two transverse dimensions. In addition, a narrow band cavity based feedback system for damping the most harmful longitudinal multi bunch mode caused by a HOM of the accelerating cavities is under construction.
|
|
|