Stimulated Cerenkov emission from ultrarelativistic helical electron beams
Abstract
The paper presents a theoretical study of the Cerenkov (synchronous) interaction of an elementary (thin) ultrarelativistic electron beam (guided by a longitudinal magnetic field) with an electromagnetic TM wave.It is shown that the relatively small transverse velocity of electrons has a significant effect on the optimal values of the interaction length, the amplitude of the Hf field, and the deviation from synchronism; meanwhile, the maximum value of efficiency is practically unchanged. It is noted, however, that the efficiency of microwave devices decreases when a scatter of transverse velocities appears in the electron beam. The Cerenkov interaction of a helical beam with TE waves is also considered.
- Publication:
-
Radiotekhnika i Elektronika
- Pub Date:
- June 1983
- Bibcode:
- 1983RaEl...28.1140K
- Keywords:
-
- Beam Interactions;
- Cerenkov Radiation;
- Relativistic Electron Beams;
- Stimulated Emission;
- Differential Equations;
- Electromagnetic Radiation;
- Helical Inducers;
- Power Efficiency;
- Transverse Waves;
- Wave Interaction;
- Electronics and Electrical Engineering