Accession Number:

ADA252174

Title:

Theory for the CEBAF Infrared and Shipboard FELS

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1992-03-01

Pagination or Media Count:

80.0

Abstract:

The continuing development of the free electron laser FEL as a powerful and versatile source of coherent radiation steadily drives toward the goal of high efficiency and broad tunability at shorter wavelengths. New experiments provide significant data and insight for analysis by theoreticians and experimentalists. Two important areas of study are short electron pulse effects, and the dynamics of optical mode distortion by intense beam currents. The initial part of this thesis examines one aspect of the projected task of FEL application as a military weapon. The advantages of the FEL over other directed energy sources are detailed, as well as the challenge presented by the effects of the marine atmosphere to high energy laser propagation. The remainder of this thesis examines several effects of long wavelength FELS. Chapter IV examines the proposed parameters of the CE-OAF IR FEL, and the analysis leads to predictions describing system performance. Chapter V examines the effects of single pass optical mode distortion for FELs with narrow electron beams. Single-mode theory states that gain is proportional to the product of electron beam current and filling factor, but three dimensional simulations show that gain is a function of electron beam-filling factor alone. Also examined is a phenomenon of destructive interference of light in the FEL modulator.

Subject Categories:

  • Lasers and Masers
  • Naval Surface Warfare
  • Directed Energy Weapons

Distribution Statement:

APPROVED FOR PUBLIC RELEASE