Gain and efficiency enhancement of a Cerenkov free electron laser by a prebunched electron beam in a dielectric loaded waveguide
- Department of Physics, Maharaja Agrasen Institute of Technology, PSP Area Plot No. 1, Sector-22, Rohini, Delhi-110085 (India)
A density prebunched electron beam on a Cerenkov free electron laser (CFEL) offers considerable enhancement in gain and efficiency in a dielectric loaded waveguide. The growth rate, efficiency, and gain were evaluated based on experimentally known parameters relevant to the CFEL. It was found that the growth rate, efficiency, and gain of the CFEL increase with the modulation index and has the largest value when the modulation index approaches unity in addition to the frequency and wave number of the prebunched beam are comparable to that of the radiation wave, i.e., when the prebunched beam velocity is comparable to the phase velocity of the radiation wave. The growth rate of the CFEL instability scales as one third power of the beam current. Moreover, the phase velocity of the radiation wave scales as minus one half power of the effective permittivity.
- OSTI ID:
- 20976607
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of beam prebunching on gain and efficiency in a free electron laser: Nonlocal theory
Cerenkov free electron lasers in the infrared
Excitation of terahertz radiation by an electron beam in a dielectric lined waveguide with rippled dielectric surface
Journal Article
·
Sun Jul 15 00:00:00 EDT 2007
· Physics of Plasmas
·
OSTI ID:20975175
Cerenkov free electron lasers in the infrared
Thesis/Dissertation
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:6201169
Excitation of terahertz radiation by an electron beam in a dielectric lined waveguide with rippled dielectric surface
Journal Article
·
Sat Sep 15 00:00:00 EDT 2012
· Physics of Plasmas
·
OSTI ID:22086158