RELATIVISTIC BEAM TRANSPORT IN A FOCUSING WIGGLER

Authors
SAKAMOTO K SHIHO M KOBAYASHI T KISHIMOTO Y MUSYOKI S WATANABE A TAKAHASHI M ISHIZUKA H KAWASAKI S
Citation
K. Sakamoto et al., RELATIVISTIC BEAM TRANSPORT IN A FOCUSING WIGGLER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 331(1-3), 1993, pp. 126-129
Citations number
7
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
126 - 129
Database
ISI
SICI code
0168-9002(1993)331:1-3<126:RBTIAF>2.0.ZU;2-H
Abstract
The transport of a relativistic electron beam was studied experimental ly and numerically in a magnetic field configuration which consists of a focusing wiggler as well as an additional axial guide field. A new beam divergence was found for the lower side of the magnetoresonance. It was identified as due to the effect of the second harmonic mode of the cyclotron frequency in the resonance, determined by nOMEGA(paralle l-to) = k(w)v(parallel-to) for n = 2. The experimental observation sho ws good agreement with the numerical calculation, where the motions of the electrons are traced in a planar wiggler having parabolic pole fa ces and an axial uniform guide field, in the limit of low density beam . The formalism for the calculation is given and discussed. The harmon ic resonance was detected for the planar wiggler first, and it could a ppear also for the helical one.