Abstract
AbstractOn the basis of the energy conservation relation between an electromagnetic wave and electron beam, the dynamic behavior of an open‐boundary Čerenkov laser is analyzed theoretically. Specifically, the power growth for the electromagnetic waves, the decrease in the beam drift velocity and its effect due to the growth of the electromagnetic wave, and the improvement in the growth characteristics by varying the permittivity of the dielectric constituting the waveguide are examined. First, it is shown that, since the growth of an electromagnetic wave causes the drift velocity of the electron beam to decrease and keeps the beam and wave out of the synchronism, the spatial growth rate at the frequency initially set decreases gradually and the growth of the electromagnetic power is prevented.Next, to keep the synchronism of the electron beam and electromagnetic wave, the permittivity of the dielectric waveguide can be increased gradually in the direction of wave propagation in accordance with the decrease in the beam drift velocity. This is shown to suppress the decrease in the spatial growth rate due to the decrease in the beam drift velocity and to improve the growth characteristics of the electromagnetic wave.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Electronics and Communications in Japan (Part II: Electronics)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
