Virtual cathode formation in annular electron beam in an external magnetic field

2009 ◽  
Vol 35 (1) ◽  
pp. 23-25 ◽  
Author(s):  
S. A. Kurkin ◽  
A. E. Hramov
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
External Magnetic Field ◽  
Virtual Cathode ◽  
Annular Electron Beam

scholarly journals Theory of terahertz Smith-Purcell radiation from a cylindrical grating

2019 ◽  
Vol 11 ◽  
pp. 110007
Author(s):  
Z. Rezaei ◽  
B. Farokhi
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Electron Beam ◽  
Dispersion Relation ◽  
External Magnetic Field ◽  
Free Electron ◽  
Free Electron Lasers ◽  
Annular Electron Beam ◽  
High Efficient ◽  
Beam Thickness

An analysis of an annular electron beam propagating along a cylindrical grating with external magnetic field Bo is presented. The grating comprises a dielectric in its slots. The dispersion relation of the modes is derived. The results demonstrate that the dielectric shifts the frequencies of the system modes to smaller values. The growth rates of the modes which are in phase with the beam are also considered. It is found that the decline in the growth rate is brought about by the dielectric. In addition, increasing the thickness of the dielectric and decreasing the height of the slots cause it to rise. The effect of beam thickness on growth rate is considered too. This is shown to increase and then fall as beam thickness increases. These results show that utilizing cylindrical grating loaded with dielectric has a promising effect on developing new kinds of compact high-efficient THz free-electron lasers based on Smith–Purcell radiation. Edited by: A. B. Márquez

Chaotic oscillations in electron beam with virtual cathode in external magnetic field

2011 ◽  
Vol 98 (11) ◽  
pp. 1549-1564 ◽  
Author(s):  
A.E. Hramov ◽  
A.A. Koronovskiy ◽  
S.A. Kurkin ◽  
I.S. Rempen
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
External Magnetic Field ◽  
Virtual Cathode ◽  
Chaotic Oscillations
Sign in / Sign up

Export Citation Format

Share Document