Electronic Resource
Springer
International journal of infrared and millimeter waves
2 (1981), S. 629-650
ISSN:
1572-9559
Keywords:
Gyrotron
;
Electron Cyclotron Maser
;
Microwaves
;
Microwave Cavity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract An analytic theory has been derived for determining the eigenfrequencies, RF-field distribution and Q of the TEmpq modes of a gyrotron resonator consisting of a circular cylinder joined to a slowly tapered section. Explicit results are obtained for a linear taper. The cavity modes are found to have an RF-field distribution which is useful for prebunching the electron beam and enhancing efficiency. For high Q cavities, the cavity Q depends on axial mode number q as q−2, which is important for mode discrimination. Proper selection of taper length is found to reduce the Q of high q modes, also aiding in mode discrimination. The present approach may be applied to other forms of weakly irregular cavities, such as cavities with nonlinear tapers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01007268
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