Gain Analysis of the FEL Using a Geometrically Focusing Permanent-Magnet Undulator
Electron; Instruments & Instrumentation; Nuclear Science & Technology; Physics, ; Particles & Fields; Spectroscopy
The propagation properties of electron beams have been studied on undulators consisting of parabolic-shaped magnets and of alternately shifted magnets; this is the succession of work on undulators having circularly curved magnets or trapezoid/rhomboid shaped magnets. The gain of the FEL was also estimated for these geometrically focusing undulators by a one dimensional simulation code. It was found that for the circularly or parabolically curved undulator an electron beam propagating with a large divergence has a small gain, both positive and negative, due to the large amplitude deviation of the magnetic field of the undulator.
Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment
Article; Proceedings Paper
Ysunawaki, Y.; Ohigashi, N.; Okazaki, T.; Mima, K.; Kuruma, S.; Sato, S.; Imasaki, K.; and Elias, L. R., "Gain Analysis of the FEL Using a Geometrically Focusing Permanent-Magnet Undulator" (1993). Faculty Bibliography. 1917.