• H. Piel, B. Aminov, A. Borisov, M. Getta, S. Kolesov, N. Pupeter
  CRE, Wuppertal

The modular architecture of high power solid state rf amplifiers for the frequency range of 72 to 3000MHz is described. The characteristic features of the modular components are presented, focusing on the multi transistor amplifier modules delivering a power in the 0.5 to 1.5 kW range, the transmission line combiner system combining up to 150 amplifier modules, the monitoring of the rf power flow in the system and other relevant performance parameters, as well as the heat exchanger concept and the digital amplifier control system.

• N. Pupeter, B. Aminov, F. Aminova, A. Borisov, M. Getta, W. Jalmuzna, T. Jezynski, S. Kolesov, H. Piel, D. Wehler
  CRE, Wuppertal
• F. Ludwig, S. Simrock
  DESY, Hamburg

For future applications in Light Sources and Large Scale Linear Accelerators we have developed a fully digital LLRF system which overcomes the intrinsic problems of analogue and semi digital LLRF systems by realizing all functions in the high speed cores of FPGAs. Due to its modular design using either the ATCA or the VME form factor the LLRF system can be configured conveniently according to the specific requirements of the accelerator to control the rf field in individual resonators or in a combination of cavities. The LLRF input stage can be custom designed for rf frequencies of up to 3.9 GHz. The hardware and software architectures of the Cryoelectra digital LLRF control system are presented.