MAGNETIC-FLUX LOSS OF THE PERMANENT-MAGNETS USED FOR THE WIGGLERS OF FELS BY THE IRRADIATION WITH HIGH-ENERGY ELECTRONS OR X-RAYS

Authors
IKEDA T OKUDA S
Citation
T. Ikeda et S. Okuda, MAGNETIC-FLUX LOSS OF THE PERMANENT-MAGNETS USED FOR THE WIGGLERS OF FELS BY THE IRRADIATION WITH HIGH-ENERGY ELECTRONS OR X-RAYS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 407(1-3), 1998, pp. 439-442
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
407
Issue
1-3
Year of publication
1998
Pages
439 - 442
Database
ISI
SICI code
0168-9002(1998)407:1-3<439:MLOTPU>2.0.ZU;2-3
Abstract
Study was made on the irradiation effects of the permanent magnets use d for the wigglers of FELs with high-energy electrons and X-rays. Four kinds of Nd-Fe-B and one kind of Sm-Co samples were irradiated with 1 7 MeV electron beams or Co-60 gamma-rays, The magnetic flux loss of on e kind of Nd-Fe-B samples irradiated with electrons at doses below 2.1 x 10(-3) C/cm(2) increased with the irradiation dose. For the electro n irradiation at doses of about 1.4 x 10-3 C/cm(2), magnetic flux loss was apparent for two kinds of Nd-Fe-B samples. No flux loss was obser ved for gamma-rays at absorbed doses higher than that of the electrons . The influence of the irradiation of electrons on the magnets of a wi ggler in FEL experiments is discussed. (C) 1998 Elsevier Science B.V, All rights reserved.