Title :
Theory of gyro-backward wave oscillators with tapered magnetic field and waveguide cross section
Author :
Nusinovich, Gregory S. ; Dumbrajs, O.
Author_Institution :
Inst. for Plasma Res., Maryland Univ., College Park, MD, USA
fDate :
6/1/1996 12:00:00 AM
Abstract :
A theory is developed which describes gyro-backward wave oscillators (gyro-BWO´s) with arbitrarily relativistic electron beams and tapered external magnetic field and waveguide wall radius. For the case of linear tapering the optimal parameters are found that correspond to highly efficient operation. The frequency tunability as the function of magnetic field and voltage deviations has been analyzed. It is shown how to use the results given in terms of normalized parameters for designing concrete gyro-BWO´s. For one concrete design the effect of electron velocity spread on the efficiency has been studied
Keywords :
backward wave oscillators; electron beams; gyrotrons; magnetic fields; millimetre wave oscillators; relativistic electron beam tubes; arbitrarily relativistic electron beams; efficient operation; electron velocity spread; frequency tunability; gyro-backward wave oscillators; linear tapering; optimal parameters; tapered magnetic field; waveguide cross section; Concrete; Electromagnetic propagation; Electromagnetic scattering; Electromagnetic waveguides; Electron beams; Equations; Frequency; Magnetic fields; Oscillators; Waveguide theory;
Journal_Title :
Plasma Science, IEEE Transactions on
