Experimental study of a FEM based on a 2D distributed feedback cavity

I.V. Konoplev, P. McGrane, K. Ronald, A.W. Cross, W. He, C.G. Whyte, A.D.R. Phelps, C.W. Robertson, David Speirs, N.S. Ginzburg, N. Yu Peskov, A.S. Sergeev, M. Thumm, IEEE

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)


We report operation of a co-axial free-electron maser (FEM) based on two-dimensional distributed feedback. The 37.3GHz FEM was driven by an annular electron beam (475kV, 500A, 250ns) and generated 15MW ±1.5MW of radiation with a 6% conversion efficiency. To investigate an increase in FEM output power and efficiency a new cavity configuration based on a copper 2D Bragg reflector is studied.
Original languageEnglish
Title of host publicationThe Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics
Place of PublicationNew Jersey, USA
Number of pages1
ISBN (Print)0780393481
Publication statusPublished - 2005


  • feedback
  • masers
  • submillimetre wave devices
  • 2D distributed feedback cavity
  • annular electron beam
  • cavity configuration
  • co-axial free-electron maser
  • copper 2D Bragg reflector


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