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Title: Optical analysis of grazing incidence ring resonators for free- electron lasers

Abstract

The design of resonators for free-electron lasers (FELS) which are to operate in the soft x-ray/vacuum ultraviolet (XUV) region of the spectrum is complicated by the fact that, in this wavelength regime, normal incidence mirrors, which would otherwise be used for the construction of the resonators, generally have insufficient reflectivities for this purpose. However, the use of grazing incidence mirrors in XUV resonators offer the possibility of providing sufficient reflectivity a lessening of the mirrors' thermal loads due to the projection of the laser beam onto an oblique surface, and the preservation of the FEL's tunability. In this work, the behavior of resonators employing grazing incidence mirrors in ring configurations is explored. In particular, two designs, each utilizing four off-axis conic mirrors and a number of flats, are examined. In order to specify the. location, orientation, and surface parameters for the mirrors in these resonators, a design algorithm has been developed based upon the properties of Gaussian beam propagation. Two computer simulation methods are used to perform a vacuum stability analysis of the two resonator designs. The first method uses paraxial ray trace techniques with the resonators' thin lens analogues while the second uses the diffraction-based computer simulation code GLAD.more » The effects of minor tilts and deviations in the mirror surface parameters are investigated for a number of resonators designed to propagate laser beams of various Rayleigh ranges. It will be shown that resonator stability de s as the laser wavelength the resonator was designed for is made smaller. In addition, resonator stability will also be seen to decrease as the amount of magnification the laser beam receives as it travels around the resonator is increased.« less

Authors:
 [1]
  1. Alabama Univ., Birmingham, AL (United States). Dept. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States); Alabama Univ., Birmingham, AL (United States). Dept. of Physics
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6921982
Report Number(s):
LA-SUB-93-7
ON: DE93006339
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: Thesis (Ph.D.)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 43 PARTICLE ACCELERATORS; CAVITY RESONATORS; COMPUTER-AIDED DESIGN; OPTICS; FREE ELECTRON LASERS; ACCELERATORS; ALGORITHMS; COMPUTERIZED SIMULATION; EXTREME ULTRAVIOLET RADIATION; G CODES; LENSES; MIRRORS; PROGRESS REPORT; WIGGLER MAGNETS; X RADIATION; COMPUTER CODES; DESIGN; DOCUMENT TYPES; ELECTRICAL EQUIPMENT; ELECTROMAGNETIC RADIATION; ELECTROMAGNETS; ELECTRONIC EQUIPMENT; EQUIPMENT; IONIZING RADIATIONS; LASERS; MAGNETS; MATHEMATICAL LOGIC; RADIATIONS; RESONATORS; SIMULATION; ULTRAVIOLET RADIATION; 426002* - Engineering- Lasers & Masers- (1990-); 430303 - Particle Accelerators- Experimental Facilities & Equipment

Citation Formats

Gabardi, D R. Optical analysis of grazing incidence ring resonators for free- electron lasers. United States: N. p., 1989. Web.
Gabardi, D R. Optical analysis of grazing incidence ring resonators for free- electron lasers. United States.
Gabardi, D R. Sun . "Optical analysis of grazing incidence ring resonators for free- electron lasers". United States.
@article{osti_6921982,
title = {Optical analysis of grazing incidence ring resonators for free- electron lasers},
author = {Gabardi, D R},
abstractNote = {The design of resonators for free-electron lasers (FELS) which are to operate in the soft x-ray/vacuum ultraviolet (XUV) region of the spectrum is complicated by the fact that, in this wavelength regime, normal incidence mirrors, which would otherwise be used for the construction of the resonators, generally have insufficient reflectivities for this purpose. However, the use of grazing incidence mirrors in XUV resonators offer the possibility of providing sufficient reflectivity a lessening of the mirrors' thermal loads due to the projection of the laser beam onto an oblique surface, and the preservation of the FEL's tunability. In this work, the behavior of resonators employing grazing incidence mirrors in ring configurations is explored. In particular, two designs, each utilizing four off-axis conic mirrors and a number of flats, are examined. In order to specify the. location, orientation, and surface parameters for the mirrors in these resonators, a design algorithm has been developed based upon the properties of Gaussian beam propagation. Two computer simulation methods are used to perform a vacuum stability analysis of the two resonator designs. The first method uses paraxial ray trace techniques with the resonators' thin lens analogues while the second uses the diffraction-based computer simulation code GLAD. The effects of minor tilts and deviations in the mirror surface parameters are investigated for a number of resonators designed to propagate laser beams of various Rayleigh ranges. It will be shown that resonator stability de s as the laser wavelength the resonator was designed for is made smaller. In addition, resonator stability will also be seen to decrease as the amount of magnification the laser beam receives as it travels around the resonator is increased.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Technical Report:
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