• V.P.Cherepanov, E.N.Dementev, A.S.Medvedko, V.V.Smaluk, D.P.Sukhanov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The fast head-tail and coupled-bunch instabilities are the reasons of the increased beam emittance, energy spread and of the operating current limitations and beam loss. For suppression of any excited transverse mode of the beam oscillation the wide-band bunch-by-bunch digital feedback system have been developed and installed on the VEPP-4M storage ring. A description of the system parameters and architectures, of the available diagnostic tools and of the experimental results is given.

238

• D. Yu. Bolkhovityanov, E.A.Gusev, V.V.Oreshonok, O.V.Pirogov, D.P.Sukhanov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The VEPP-5 500 Mev preinjector has some 2856 MHz power klystrons and others RF devices to drive the accelerating modules. The amplitude and phase control of RF power for the energy doubler device (SLED) and for the preinjector accelerating section is necessary. The system of the RF parameters manipulation and of the precision monitoring is created. A description of this system parameters and architectures, of the available diagnostic tools and of the experimental results is given.

244