Accession Number : ADD014141

Title :   Free Electron Laser Using a Relativistic Beam with Spiralling Electron.

Descriptive Note : Patent, Filed 31 Jan 84, patented 25 Apr 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Marshall, Thomas C ; Schlesinger, S P ; Grossman, Arthur A ; Chen, Shien-Chi

Report Date : 25 Apr 1989

Pagination or Media Count : 5

Abstract : A free electron laser (FEL) is described which is used for generating high power radiation in a region of increasing guiding magnetic field before injection into an undulating low magnetic field. It includes an electron beam propagating along a guiding magnetic field B0 (approximately 10 kilo gauss) inside a hollow metallic tube used as a wave guide. Around the path of the beam, an undulator in the form of a bifilar helical winding or the like produces a periodic magnetic field B1 (approximately 0.5 to 1.0 kG). The electron motion accordingly has a substantial transverse component and the motion at the cyclotron and undulator frequencies occurs. Due to the energy exchange between the gyrating component of electron motion and an electromagnetic wave already present in the hollow tube, radiation of a calculable frequency is amplified. Patents. (JHD)

Descriptors :   *ELECTRON BEAMS, *TUNABLE LASERS, *FREE ELECTRON LASERS, *PATENTS, ELECTROMAGNETIC RADIATION, ENERGY TRANSFER, FILAMENT WOUND CONSTRUCTION, HELIXES, HIGH POWER, MAGNETIC FIELDS, METALS, PATHS, RADIATION, TRANSVERSE, TUBES, WAVEGUIDES, WINDING

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE