Output power enhancement of ac Raman free-electron laser

Conference · Thu Jan 01 00:00:00 EST 1987

DOI:https://doi.org/10.1016/0168-9002(88)90207-0· OSTI ID:5915060

Yan, Y T

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5915060
• Report Number(s): LA-UR-87-3013; CONF-8709140-1; ON: DE88000503
• 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

Related Subjects

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)