Ponomarenko S. S. UkraineKharkiv O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Science of Ukraine, ul. Akademika Proskury, 12, Kharkiv, 61085, Ukraine sergyponomarenko@gmail.com Author's articles AUTOOSCILLATIONS IN O-TYPE OSCILLATOR AT EXCITATION OF SPACE-SURFACE MODE IN RESONATOR WITH A PERIODICALLY INHOMOGENEOUS GRATING MAGNETIC FOCUSING SYSTEM FOR INTENSE ELECTRON BEAMS OF SUBMILLIMETER CLINOTRONS
