Numerical study of free-electron lasers with reversed guide field

Ge Zhang; Gennady Shvets; Jonathan S. Wurtele

doi:10.1117/12.147470

8 July 1993 Numerical study of free-electron lasers with reversed guide field

Ge Zhang, Gennady Shvets, Jonathan S. Wurtele

Proceedings Volume 1872, Intense Microwave Pulses; (1993) https://doi.org/10.1117/12.147470
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Numerical studies of the high efficiency results recently reported by Conde and Bekefi for a reversed field FEL are presented. These studies indicate that the predicted saturated power is rather sensitive to the detailed model used of the space-charge forces. The reported results for Group I FEL operation can be reproduced by increasing the emittance by 45% compared with the reversed field case. In this regime particle loss, rather than trapping, is the saturation mechanism. The Group II results are not consistent with the single-frequency model. A two- frequency model has been developed to study the influence of competition between the modes of the upper and lower FEL intersections. Initial results from this model indicates that the low power in the Group II experiment is not a consequence of mode competition.

Citation Download Citation

Ge Zhang, Gennady Shvets, and Jonathan S. Wurtele "Numerical study of free-electron lasers with reversed guide field", Proc. SPIE 1872, Intense Microwave Pulses, (8 July 1993); https://doi.org/10.1117/12.147470

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