Accession Number : ADA189507

Title :   Development of Electrostatic-Accelerator Free-Electron Lasers.

Descriptive Note : Final rept. 15 Jan 80-30 Apr 87,

Corporate Author : CALIFORNIA UNIV SANTA BARBARA

Personal Author(s) : Elias, Luis R

PDF Url : ADA189507

Report Date : 30 Apr 1987

Pagination or Media Count : 62

Abstract : A free-electron laser has been developed based on the utilization of a 6 MV electrostatic accelerator which has been modified to generate relatively high current electron pulses of sufficient intensity to allow its operation as an oscillator over a wide range of frequencies from the infrared (IR) to the far-infrared (FIR) region. The FEL began with the development of a unique, high current, high brightness electron gun. Continued with the successful demonstration of very high electron beam recovery efficiency in 1983 and culminated with the operation of the FEL as an oscillator at wavelengths longer than 400 microns, and with the demonstration of laser operation at wavelength longer than 120 micrometers after upgrading the accelerator voltage from 3 to 6 MV. The major goal of the program is to develop a new breed of free electron lasers based on the electron beams generated by electrostatic accelerators which would eventually be used as tools for scientific research in those regions of the spectrum where other coherent electromagnetic sources do not provide adequate power and/or continuous tunability. Much of the design and construction of the FEL hardware was done during Phase I. Initial testing of the hardware took place using a 3 MV accelerator made available to the FEL group. The construction and assembly of the FEL, as well as the first operation of the FEL, took place in the laboratory during Phase II. Finally, during phase III, the voltage of the accelerator was increased from 3 to 6 MV, in order to extend the operation of the FEL toward shorter wavelengths in the FIR region.

Descriptors :   *ELECTROSTATIC ACCELERATORS, *FREE ELECTRON LASERS, BRIGHTNESS, COHERENCE, ELECTROMAGNETIC PULSES, ELECTROMAGNETIC RADIATION, ELECTRON BEAMS, ELECTRON GUNS, ELECTROSTATICS, FAR INFRARED RADIATION, FREE ELECTRONS, HIGH POWER, HIGH RATE, OSCILLATORS, PARTICLE ACCELERATORS, RANGE(EXTREMES), TUNING, VOLTAGE, INFRARED LASERS, RESONATORS, INFRARED SPECTRA

Subject Categories : Lasers and Masers
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE