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Proposal for novel FEL operation

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1 Author(s)
Pinhas, S. ; Max-Planck Inst. fur Quantenoptik, Garching, Germany

It is shown that free-electron-laser (FEL) operation in a novel wiggler, proposed in a previous paper by the author (1990), is possible. A single-particle approach is used to derive the small-signal gain equation at the fundamental harmonic in this configuration for sufficiently small aω. The small-signal gain curve has the same shape as that of the ordinary linearly polarized FEL, but the expressions for the resonance parameter and for the multiplying coefficient in the small-signal gain equation are different. The maximum value of the small-signal gain is proportional to the cube of the interaction region length in the present case, as in the ordinary linearly polarized FEL, but the maximum value of the small-signal gain is greater than that of the ordinary linearly polarized FEL for large enough surface current density

Published in:

Quantum Electronics, IEEE Journal of  (Volume:28 ,  Issue: 11 )