Proposal for a novel wiggler

A magnetostatic-field configuration that is independent of the axial (z) coordinate is presented. The motion of an electron in the xz plane in this magnetostatic field is determined. The velocities and the orbit of the electron are identical to those in the ordinary FEL (free electron laser) but with other expressions for the parameters omega /sub 0/ and a/sub omega /. An expression for the wavelength of the radiation of the fundamental harmonic ( lambda /sub s/) is derived. Some numeric examples of lambda /sub s/ and a/sub omega / are given, and it is concluded that the method presented is promising for obtaining high values of a/sub omega /.<
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