| Popis: |
A central problem for the electron machines PETRA, HERA and DORIS is the strong current limitation due to multi-bunch instabilities. The design currents of these machines are a factor of twenty above threshold currents. For the proton machines the beam quality is strongly affected by instabilities. In order to reach the design currents in routine operation of the electron machines very effective multi-bunch feedback systems have been developed. Starting with an intensive theoretical investigation of those systems the technical concept was elaborated. |
