학술논문

Helium-Free Field Measurement System for Superconducting Undulator Coils
Document Type
Periodical
Source
IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 19(3):2333-2336 Jun, 2009
Subject
Fields, Waves and Electromagnetics
Engineered Materials, Dielectrics and Plasmas
Superconducting coils
Undulators
Magnetic field measurement
Error correction
Superconducting magnets
Hall effect devices
Permanent magnets
Helium
Synchrotrons
Electron beams
Magnetic measurements
superconducting coils
undulators
Language
ISSN
1051-8223
1558-2515
2378-7074
Abstract
Superconducting undulators generate, for a given period length and a given gap, higher fields than permanent magnet undulators. Since in an undulator the photons add up coherently over the whole undulator length, even small magnetic field errors can disturb the superposition of photons and reduce the intensity of the generated photon beam. Therefore, as in any other undulator, the magnetic field has to be measured with high accuracy.