• P. Balleyguier
  CEA, Bruyères-le-Châtel
• P. Bertrand, M. Di Giacomo, G. Fremont, M. Michel
  GANIL, Caen

The high current driver accelerator of the SPIRAL 2 project uses a single-bunch selector to reduce the bunch repetition rate at the experimental target. The device works at almost 1 MHz and handles fast RF pulses of 18 ns with transient times shorter than 6 ns. The first electrode prototype, built in the framework of the Eurisol DS project, was used for thermal and RF tests and didn't show correct delay and matching. The paper describes the studies to improve these two important issues and the results of thermal tests