Proof-of-principle experiment for a sheet-beam, near-millimeter, free electron laser with output power up to 1 Megawatt

  • J. H. Booske
  • , T. M. Antonsen
  • , Y. Carmel
  • , W. W. Destler
  • , J. Finn
  • , V. L. Granatstein
  • , P. E. Latham
  • , B. Levush
  • , I. D. Mayergoyz
  • , D. Radack
  • , Z. X. Zhang
  • , M. E. Read
  • , A. Linz

Research output: Contribution to journalConference articlepeer-review

Abstract

The use of a small period wiggler (lw < 1 cm) together with a sheet electron beam has been proposed as a low cost source of power for electron cyclotron resonance heating (ECRH) in magnetic fusion plasmas and for space-based radar systems. We have experimentally demonstrated stable propagation of a sheet beam (18 A, 1 mm × 20 mm) through a ten-period wiggler electromagnet with peak field of 1.2 kG. Calculation of microwave wall heating and pressurized water cooling have also been carried out, and indicate the feasibility of operating a near-millimeter, sheet beam FEL with an output power of 1 MW CW (corresponding to power density into the walls of 2 kW/cm2). Based on these encouraging results, a proof-of-principle experiment is being assembled, and is aimed at demonstrating FEL operating at 120 GHz with 300 kW output power in 1 µs pulses; electron energy would be 410 keV. Preliminary design of a 300 GHz, 1 MW FEL with an untapered wiggler is also presented. Finally, a method of modulating high power CW signals for radar applications is suggested.

Original languageEnglish
Pages (from-to)273-281
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1061
DOIs
StatePublished - 25 Jul 1989
Externally publishedYes
EventMicrowave and Particle Beam Sources and Directed Energy Concepts 1989 - Los Angeles, United States
Duration: 15 Jan 198920 Jan 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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