caa a22 4500 477124488 CHVBK 20180405111645.0 cr unu---uuuuu 170330e19970201xx s 000 0 eng 10.1007/BF02677937 doi (NATIONALLICENCE)springer-10.1007/BF02677937 Linear analysis of cyclotron-cherenkov and cherenkov instabilities in dielectric-loaded coaxial waveguides [Elektronische Daten] [Cha-Yeol Lee, Ryoichi Yamashita, Masaru Masuzaki] We present, based on the cold fluid theory, linear analysis of the Cherenkov and cyclotron-Cherenkov instabilities which are driven when a linear electron beam is injected into a dielectric-loaded waveguide immersed in an axial magnetic field. In the analysis we consider azimuthally symmetric TM0n modes. We derive dispersion relations for three types of waveguide, and compare computationally obtained linear growth rates of both instabilities. For the type A, which consists of a metallic cylinder with dielectric liner on its inner surface, the growth rate of the Cherenkov instability is larger than that of the cyclotron-Cherenkov instability. For the type B, which consists of a dielectric core and an outer metallic cylinder, both growth rates are comparable. And for the type C, which consists of a metallic core with dielectric liner on its surface and an outer metallic cylinder, the growth rate of the latter instability is higher than that of the former instability. Finally, for the type C, obtained are dependences of the oscillation frequency and the growth rates of both instabilities on the following parameters: the beam energy, the beam current, the axial magnetic field, the dielectric constant, and the thickness of the dielectric. Plenum Publishing Corporation, 1997 Cyclotron-Cherenkov instability nationallicence Cherenkov instability nationallicence dielectric-loaded waveguide nationallicence linear electron beam nationallicence dispersion relation nationallicence linear growth rate nationallicence Lee Cha-Yeol Department of Physics, Faculty of Science, Kanazawa University, 920-11, Kanazawa, Japan aut Yamashita Ryoichi Department of Physics, Faculty of Science, Kanazawa University, 920-11, Kanazawa, Japan aut Masuzaki Masaru Department of Physics, Faculty of Science, Kanazawa University, 920-11, Kanazawa, Japan aut International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/2(1997-02-01), 519-535 0195-9271 18:2<519 1997 18 10762 https://doi.org/10.1007/BF02677937 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02677937 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Cha-Yeol Department of Physics, Faculty of Science, Kanazawa University, 920-11, Kanazawa, Japan aut NATIONALLICENCE 700 1- Yamashita Ryoichi Department of Physics, Faculty of Science, Kanazawa University, 920-11, Kanazawa, Japan aut NATIONALLICENCE 700 1- Masuzaki Masaru Department of Physics, Faculty of Science, Kanazawa University, 920-11, Kanazawa, Japan aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/2(1997-02-01), 519-535 0195-9271 18:2<519 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer