Accession Number : ADD012990

Title :   Free Electron Laser Device for Scanning a Spatial Field.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Condell,William J , Jr

Report Date : 24 Sep 1985

Pagination or Media Count : 11

Abstract : The improved free electron laser device for scanning a spatial field is generally comprised of a drift tube and a rotatable mandrel. The mandrel is concentrically disposed in the tube so as to define an annular space there-between. A series of canted mirrors of grooved-like configuration are formed about the mandrel in predetermined spaced relationship to each other and at a predetermined angle to a plane transverse of the mandrel. These mirrors function to reflect and phased redistribute various waves of the wave front so as to form a plurality of asymmetric diffraction patterns in the annular space. By reason of the nutating effect of the canted and rotating mirrors, the projected beam conically and continuously scans a region of the spatial field. In order to minimize the effect of skew waves, a series of circumferentially spaced and longitudinally extending rib-like baffles can be affixed to the tube interior between adjoining mirrors.

Descriptors :   *PATENTS, *FREE ELECTRON LASERS, *CONICAL SCANNING, ASYMMETRY, DIFFRACTION, PATTERNS, ELECTRONIC EQUIPMENT, MIRRORS, SPATIAL DISTRIBUTION, ELECTRODES, PARTICLE ACCELERATOR COMPONENTS, SKEWNESS, WAVES, WAVEFRONTS, LASER BEAMS, BAFFLES, MANDRELS, ROTATION

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE