Author: Reinsch, C.
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.