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| Paper IPM / P / 7935 | ||||||||||||||||||||||
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A one-dimensional relativistic theory of Raman backscattering has been developed for a free-electron laser(FEL)with a helical wiggler and an ion channel guiding. The beam-frame linear dispersion equation and lab-frame spatial growth rate, which involves the coupling space-charge and radiation waves by the wiggler field, have been derived. A numerical computation of the growth rate for ion channel guiding has been made.
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