GAIN ANALYSIS OF THE FEL USING A GEOMETRICALLY FOCUSING PERMANENT-MAGNET UNDULATOR

Authors
TSUNAWAKI Y OHIGASHI N OKAZAKI T MIMA K KURUMA S SATO S IMASAKI K NAKAI S ELIAS LR
Citation
Y. Tsunawaki et al., GAIN ANALYSIS OF THE FEL USING A GEOMETRICALLY FOCUSING PERMANENT-MAGNET UNDULATOR, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 331(1-3), 1993, pp. 727-730
Citations number
6
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
331
Issue
1-3
Year of publication
1993
Pages
727 - 730
Database
ISI
SICI code
0168-9002(1993)331:1-3<727:GAOTFU>2.0.ZU;2-K
Abstract
The propagation properties of electron beams have been studied on undu lators consisting of parabolic-shaped magnets and of alternately shift ed magnets; this is the succession of work on undulators having circul arly 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 circu larly or parabolically curved undulator an electron beam propagating w ith a large divergence has a small gain, both positive and negative, d ue to the large amplitude deviation of the magnetic field of the undul ator.