SHORT-PERIOD EQUIPOTENTIAL-BUS ELECTROMAGNETIC UNDULATOR FOR A FAR-INFRARED FREE-ELECTRON LASER

Authors
JEONG YU LEE BC KIM SK CHO SO CHA BH LEE J VOBLY PD KOLOKOLNIKOV YM MIHAYLOV SF KULIPANOV GN
Citation
Yu. Jeong et al., SHORT-PERIOD EQUIPOTENTIAL-BUS ELECTROMAGNETIC UNDULATOR FOR A FAR-INFRARED FREE-ELECTRON LASER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 407(1-3), 1998, pp. 396-400
Citations number
5
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
407
Issue
1-3
Year of publication
1998
Pages
396 - 400
Database
ISI
SICI code
0168-9002(1998)407:1-3<396:SEEUFA>2.0.ZU;2-7
Abstract
An equipotential-bus electromagnetic undulator has been developed for a far infrared compact free-electron laser. It has 2 m length, 5.6 mm gap, and 12.5 mm period. The field distribution along the undulator is formed by 2.25 mm thick poles of low-carbon steel with 4 mm thick Nd- Fe-B permanent magnets between them. The amplitude of the magnetic fie ld is up to 6 kG. The variation of current allows us to vary the field amplitude within 10% in a constant gap. For the distribution of the p eak amplitude along the undulator we obtained random r.m.s. deviation less than 0.5% without further field correction or individual adjustme nt of each iron pole or magnet. (C) 1998 Elsevier Science B.V. All rig hts reserved.