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 Jr.; Y. Carmel; W. W. Destler; J. Finn; V. L. Granatstein; P. E. Latham; B. Levush; I. D. Mayergoyz; D. Radack

doi:10.1117/12.951808

25 July 1989 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 Jr., Y. Carmel, W. W. Destler, J. Finn, V. L. Granatstein, P. E. Latham, B. Levush, I. D. Mayergoyz, D. Radack

Author Affiliations +

Proceedings Volume 1061, Microwave and Particle Beam Sources and Directed Energy Concepts; (1989) https://doi.org/10.1117/12.951808
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

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 plas-mas and for space-based radar systems. We have experimentally demonstrated stable propagation of a sheet beam (18 A, 1 mm x 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.

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J. H. Booske, T. M. Antonsen Jr., Y. Carmel, W. W. Destler, J. Finn, V. L. Granatstein, P. E. Latham, B. Levush, I. D. Mayergoyz, and D. Radack "Proof-Of-Principle Experiment For A Sheet-Beam, Near-Millimeter, Free Electron Laser With Output Power Up To 1 Megawatt", Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); https://doi.org/10.1117/12.951808

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KEYWORDS

Free electron lasers

Oscillators

Electron beams

Medium wave

Microwave radiation

Beam propagation method

Radar

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