NDLI: Magnetization Effects on the Superconducting Combined Magnet Prototype for XFEL

Content Provider	IEEE Xplore Digital Library
Author	Toral, F. Abramian, P. Bandelmann, R. Brueck, H. Calero, J. Carrillo, D. Garcia-Tabares, L. Gutierrez, J.L. Rodriguez, E. Rodriguez, I. Sanz, S. Stolper, M.
Copyright Year	2002
Abstract	The superconducting combined magnets for the main linac are part of the Spanish contribution to XFEL. Each magnet consists of a super-ferric quadrupole for focusing and two dipoles (horizontal and vertical) for steering, glued on the beam tube. The magnets will be operated in a superfluid helium bath. The aperture is 78 mm. The quadrupole gradient is 35 T/m whereas each dipole field is about 0.04 T. This paper reports about the magnetic measurements made on the first prototype. Measured field quality matches calculated values, both at room and cold conditions. Magnetization has been also measured in all the coils, with single or combined powering. Asymmetric and strongly non-linear transfer functions have been observed when quadrupole and dipoles were powered simultaneously. On the other hand, detailed computations were made with ROXIE to understand that issue. Results matched measurements when only one set of coils was powered, but not when two of them were energized. It is likely that the effect of the transport current or the coil-ends-which are not modeled by ROXIE-could explain the difference.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1136
Ending Page	1140
Page Count	5
File Size	605312
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting magnets Magnetization Prototypes Magnetic field measurement Coils Linear particle accelerator Apertures Magnetic variables measurement Transfer functions superconducting accelerator magnets Magnetic measurements magnetization processes
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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