Accession Number : ADD012716

Title :   Free Electron Laser with Tapered Axial Magnetic Field.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gold,Steven H ; Freund,Henry P

Report Date : 17 Feb 1987

Pagination or Media Count : 10

Abstract : This patent discloses a free electron laser for emitting coherent radiation. The laser includes a wiggler magnet for producing a spatially periodic magnetic field in the drift region into which relativistic electrons are injected in a predetermined direction. An axial magnet is provided which generates an axial magnetic field parallel to the above predetermined direction. The axial field is tapered in field strength within a uniform wiggler region, wherein the wiggler field is of uniform and constant magnitude, such that the tapered field acts to oppose the change in axial electron velocity resulting from the free electron laser interaction as electrons travel through the drift region. The tapered axial field acts to enhance power output and efficiency.

Descriptors :   *PATENTS, *FREE ELECTRON LASERS, AXES, ELECTRONS, VELOCITY, MAGNETS, DRIFT, COHERENT RADIATION, EMISSION, OUTPUT, POWER, MAGNETIC FIELDS, TRAVEL, FIELD INTENSITY, TAPER, RELATIVITY THEORY

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE