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Title: Experimental Study of Coaxial Free-Electron Maser Based on Two-Dimensional Distributed Feedback

Abstract

The first experimental study of a coaxial free-electron maser (FEM) based on two-dimensional (2D) distributed feedback is presented. A new type of cavity formed with coaxial 2D surface photonic band gap structures was used. The FEM was driven by a large diameter (7 cm), high-current (500 A), annular electron beam of energy 475 keV. By tuning the amplitude of the undulator or guide magnetic field, modes associated with the different band gaps of the 2D structures were excited. The Ka-band coaxial FEM generated 15 MW of radiation with a 6% conversion efficiency, in excellent agreement with theory.

Authors:
; ; ; ; ; ; ;  [1]
  1. SUPA, Department of Physics, University of Strathclyde, Glasgow G4 ONG (United Kingdom)
Publication Date:
OSTI Identifier:
20776987
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevLett.96.035002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ELECTRIC CURRENTS; ELECTRON BEAMS; ELECTRONS; FEEDBACK; FREE ELECTRON LASERS; KEV RANGE 100-1000; MAGNETIC FIELDS; MASERS; TWO-DIMENSIONAL CALCULATIONS; WIGGLER MAGNETS

Citation Formats

Konoplev, I.V., McGrane, P., He, W., Cross, A.W., Phelps, A.D.R., Whyte, C.G., Ronald, K., and Robertson, C.W.. Experimental Study of Coaxial Free-Electron Maser Based on Two-Dimensional Distributed Feedback. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.035002.
Konoplev, I.V., McGrane, P., He, W., Cross, A.W., Phelps, A.D.R., Whyte, C.G., Ronald, K., & Robertson, C.W.. Experimental Study of Coaxial Free-Electron Maser Based on Two-Dimensional Distributed Feedback. United States. doi:10.1103/PhysRevLett.96.035002.
Konoplev, I.V., McGrane, P., He, W., Cross, A.W., Phelps, A.D.R., Whyte, C.G., Ronald, K., and Robertson, C.W.. Fri . "Experimental Study of Coaxial Free-Electron Maser Based on Two-Dimensional Distributed Feedback". United States. doi:10.1103/PhysRevLett.96.035002.
@article{osti_20776987,
title = {Experimental Study of Coaxial Free-Electron Maser Based on Two-Dimensional Distributed Feedback},
author = {Konoplev, I.V. and McGrane, P. and He, W. and Cross, A.W. and Phelps, A.D.R. and Whyte, C.G. and Ronald, K. and Robertson, C.W.},
abstractNote = {The first experimental study of a coaxial free-electron maser (FEM) based on two-dimensional (2D) distributed feedback is presented. A new type of cavity formed with coaxial 2D surface photonic band gap structures was used. The FEM was driven by a large diameter (7 cm), high-current (500 A), annular electron beam of energy 475 keV. By tuning the amplitude of the undulator or guide magnetic field, modes associated with the different band gaps of the 2D structures were excited. The Ka-band coaxial FEM generated 15 MW of radiation with a 6% conversion efficiency, in excellent agreement with theory.},
doi = {10.1103/PhysRevLett.96.035002},
journal = {Physical Review Letters},
number = 3,
volume = 96,
place = {United States},
year = {Fri Jan 27 00:00:00 EST 2006},
month = {Fri Jan 27 00:00:00 EST 2006}
}