High precision system for magnetic field measurements of insertion devices of the Brazilian Synchroton Light Source / Sistema de alta precisão para as medições dos campos magneticos dispositivos de inserção do Laboratorio Nacional de Luz Sincroton

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This Thesis was a consequence of the need for an accurate and precise magnetic field measurement bench for insertion devices characterization (IDs). Such devices are versatile radiation sources installed in Electron Storage Rings. From their magnetic field profile, they provide high photon fluxes, with broad or monochromatic spectrum, being possible, depending on the ID geometry, to control also the radiation polarization. Due to some features of the LNLS electron beam, such as injection energy, operation energy and dynamic aperture, severe restrictions are imposed on the magnetic field quality to assure a long life time and a stable beam orbit. A characterization bench, 4.2 m in length, was built to verify such specifications and to determine the field profile, which is correlated to the emission spectrum. Two techniques were implemented in this bench: rotating coil, for average (or integrated) field measurements, and Hall probes, for local field measurements. Both techniques were conceptually explored and improved to guarantee the reliability of the measured values within their specifications. The results showed a considerable increasing in the precision with respect to values presented in the scientific literature

ASSUNTO(S)

magnetic devices accelerators bobinas detectores hall effect efeito particle aceleradores de particulas electric coils dispositivos magneticos hall particle storage rings aneis de armazenamento detectors

ACESSO AO ARTIGO

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