Title :
Theory of aftercavity interaction in gyrotrons
Author :
Nusinovich, G.S. ; Sinitsyn, O.V.
Author_Institution :
Inst. for Res. in Electron. & Appl. Phys., Univ. of Maryland, College Park, MS, USA
Abstract :
The theory describing the cyclotron resonance interaction between electrons in a spent beam exiting the cavity and traveling electromagnetic waves propagating from the cavity exit into the output part of a gyrotron is developed .At present, it is recognized that this parasitic effect may lead to the gyrotron efficiency degradation. First, a simple theory is developed which allows one to analyze the role of aftercavity interaction on gyrotron operation. Then, the simulations done with the use of the self-consistent code MAGY are described. It is shown that when the profile of the output waveguide and the axial distribution of the magnetic field are properly optimized, the effect of aftercavity interaction on the efficiency degradation can be significantly diminished.
Keywords :
cyclotron resonance; gyrotrons; millimetre wave tubes; aftercavity interaction theory; cyclotron resonance interaction; electromagnetic wave propagatiion; gyrotron efficiency degradation; magnetic field axial distribution; output waveguide profile; self-consistent code MAGY simulations; Cyclotrons; Degradation; Educational institutions; Electromagnetic scattering; Electron beams; Gyrotrons; Magnetic analysis; Magnetic fields; Magnetic resonance; Physics; cyclotron resonance; efficiency; gyrotron;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193450