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Free electron laser pumped by a powerful traveling electromagnetic wave

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4 Author(s)
Kehs, R.Alan ; Harry Diamond Labs., Adelphi, MD, USA ; Carmel, Y. ; Granatstein, V.L. ; Destler, William W.

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 B0 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 B0

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Plasma Science, IEEE Transactions on  (Volume:18 ,  Issue: 3 )