• N.Yu. Peskov, N.S. Ginzburg, S.V. Kuzikov, A. Sergeev
  IAP/RAS, Nizhny Novgorod
• A.K. Kaminsky, E.A. Perelstein, S.N. Sedykh
  JINR, Dubna, Moscow Region

The JINR-IAP FEM-oscillator was elaborated during the last few years based on 0.8 MeV / 200 A / 250 ns linac LIU-3000 (Dubna). This 30-GHz FEM generates currently 20 MW / 200 ns pulses with spectrum width of ~6 MHz and repetition rate of up to 1 Hz. The high efficiency and stability of the FEM was achieved by using reversed guide magnetic field regime and advanced type of Bragg resonator, i.e. resonator with a step of phase of corrugation. The parameters achieved allow the FEM to be used in several applications. Test facility to study the life time of the metals in strong RF-fields was constructed based on the FEM. This information would be beneficial, in particular, when designing high-gradient accelerating structures for future linear colliders. Degradation of the copper surface was studied at different temperature rise during each pulse (from 50° to 250° C) in consequence of up to ~100 000 pulses. Investigation of possibility to use JINR-IAP FEM in medical and biological applications was also started. The effect of the powerful 30-GHz pulses on the biological tissue including the cancer cells was studied. Project to advance JINR-IAP FEM into sub-mm wavelengths is developed.