Output power enhancement of ac Raman free-electron laser
Abstract
The ac free-electron laser (ac FEL) uses an ac (temporally oscillating but spatially uniform) field as the pump source with the hope that electromagnetic radiation will be produced with wavelength shorter than that can be generated by a conventional magnet FEL. The ac field can be provided by a superconducting cavity or by a plasma wave. In this note, the effects of the thermal motion of the electron beam on the linear gain and the nonlinear saturated output power in a Raman-regime ac FEL with the launch of an electromagnetic signal wave by particle-in-cell simulations are investigated. The output power enhancement of the ac FEL either by imposing an appropriate axial electric field at the time of radiation saturation or by properly tapering the strength or the frequency of the ac pump is discussed.
- Authors:
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 5915060
- Report Number(s):
- LA-UR-87-3013; CONF-8709140-1
Journal ID: ISSN 0168-9002; ON: DE88000503
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Conference
- Resource Relation:
- Journal Volume: 272; Journal Issue: 1-2; Conference: 9. international free electron laser conference, Williamsburg, VA, USA, 14 Sep 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; ALTERNATING CURRENT; ELECTRIC FIELDS; FREE ELECTRON LASERS; POWER; DESIGN; EFFICIENCY; ELECTROMAGNETIC RADIATION; PLASMA WAVES; SUPERCONDUCTING CAVITY RESONATORS; WIGGLER MAGNETS; CAVITY RESONATORS; CURRENTS; ELECTRIC CURRENTS; ELECTRICAL EQUIPMENT; ELECTROMAGNETS; ELECTRONIC EQUIPMENT; EQUIPMENT; LASERS; MAGNETS; RADIATIONS; RESONATORS; SUPERCONDUCTING DEVICES; 420300* - Engineering- Lasers- (-1989)
Citation Formats
Yan, Y T. Output power enhancement of ac Raman free-electron laser. United States: N. p., 1987.
Web. doi:10.1016/0168-9002(88)90207-0.
Yan, Y T. Output power enhancement of ac Raman free-electron laser. United States. https://doi.org/10.1016/0168-9002(88)90207-0
Yan, Y T. 1987.
"Output power enhancement of ac Raman free-electron laser". United States. https://doi.org/10.1016/0168-9002(88)90207-0. https://www.osti.gov/servlets/purl/5915060.
@article{osti_5915060,
title = {Output power enhancement of ac Raman free-electron laser},
author = {Yan, Y T},
abstractNote = {The ac free-electron laser (ac FEL) uses an ac (temporally oscillating but spatially uniform) field as the pump source with the hope that electromagnetic radiation will be produced with wavelength shorter than that can be generated by a conventional magnet FEL. The ac field can be provided by a superconducting cavity or by a plasma wave. In this note, the effects of the thermal motion of the electron beam on the linear gain and the nonlinear saturated output power in a Raman-regime ac FEL with the launch of an electromagnetic signal wave by particle-in-cell simulations are investigated. The output power enhancement of the ac FEL either by imposing an appropriate axial electric field at the time of radiation saturation or by properly tapering the strength or the frequency of the ac pump is discussed.},
doi = {10.1016/0168-9002(88)90207-0},
url = {https://www.osti.gov/biblio/5915060},
journal = {},
issn = {0168-9002},
number = 1-2,
volume = 272,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}