Accession Number : ADA194217

Title :   Analysis of Free Electron Laser Performance Utilizing the National Bureau of Standards' CW Microtron,

Corporate Author : NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD

Personal Author(s) : Tang, Cha-Mei ; Sprangle, Phillip

PDF Url : ADA194217

Report Date : Jan 1987

Pagination or Media Count : 4

Abstract : The National Bureau of Standards' (NBS) CW racetrack microtron (RTM) will be utilized as a driver for a free electron laser (FEL) oscillator. The NBS RTM possesses many exceptional properties of value for the FEL; i) CW operation, ii) energy from 20-185 MeV, iii) small energy spread and emittance, iv) excellent energy stability, and v) high average power. The 1-D FEL gain formula predicts that the FEL would oscillate at the fundamental approximately from 0.25 micron to 10 micron when up-grading the peak current to equal to or greater than 2 A. In this paper, we present 3-D self-consistent numerical results including several realistic effects, such as emittance, betatron oscillations, diffraction and refraction. The results indicate that the design value of the transverse emittance is small enough that it does not degrade the FEL performance for intermediate to long wavelengths, and only slightly degrades the performance at the shortest wavelength under consideration. Due to the good emittance, the current density is high enough that focusing, or guiding, begins to manifest itself for wavelengths 2.0 microns.

Descriptors :   *FREE ELECTRON LASERS, *ELECTRON ACCELERATORS, *PUMPING(ELECTRONICS), BETATRONS, CURRENT DENSITY, ELECTRIC CURRENT, EMITTANCE, ENERGY, FORMULATIONS, LASERS, LONG WAVELENGTHS, OPERATION, OSCILLATION, OSCILLATORS, PEAK POWER, PERFORMANCE(ENGINEERING), REFRACTION, STABILITY, TRANSVERSE, CONTINUOUS WAVES

Subject Categories : Particle Accelerators
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE