Free electron laser pumped by a powerful traveling electromagnetic wave
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Date
1990-06Author
Kehs, R.
Carmel, Yuval
Granatstein, Victor
Destler, William
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A three-wave free-electron laser (FEL) was operated with
a powerful 8.4-GHz electromagnetic “pump” wave replacing the usual
magnetostatic wiggler. The presence of a uniform axial magnetic field
B,, produced cyclotron-harmonic “idler” waves. Peaks in the emission
spectrum corresponding to cyclotron harmonics were observed covering
a frequency range from 16.5 to 130 GHz. The frequency spectrum
of this novel FEL mechanism was tuned continuously by the variation
of B,,.
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