Magnetization Effects on the Superconducting Combined Magnet Prototype for XFEL

被引:8
作者
Toral, Fernando [1 ]
Abramian, Pablo [1 ]
Bandelmann, Ruediger [2 ]
Brueck, Heiner [2 ]
Calero, Jesus [3 ]
Carrillo, David [1 ]
Garcia-Tabares, Luis [1 ,3 ]
Gutierrez, Jose L. [1 ]
Rodriguez, Enrique [1 ]
Rodriguez, Iker [1 ]
Sanz, Santiago [1 ]
Stolper, Matthias [2 ]
机构
[1] CIEMAT, E-28040 Madrid, Spain
[2] DESY, D-22607 Hamburg, Germany
[3] CEDEX, E-28037 Madrid, Spain
关键词
Magnetic measurements; magnetization processes; superconducting accelerator magnets;
D O I
10.1109/TASC.2009.2017706
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The superconducting combined magnets for the main linac are part of the Spanish contribution to XFEL. Each magnet consists of a superferric 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.
引用
收藏
页码:1136 / 1140
页数:5
相关论文
共 5 条
[1]   A vector hysteresis model for superconducting filament magnetization in accelerator magnets [J].
Aleksa, M ;
Auchmann, B ;
Russenschuck, S ;
Völlinger, C .
IEEE TRANSACTIONS ON MAGNETICS, 2004, 40 (02) :864-867
[2]  
IWASA Y, 1994, CASE STUDIES SUPERCO, pCH5
[3]  
PEKELER M, 1992, 9206 DESY HERA
[4]  
TORAL F, 2006, EPAC P ED
[5]  
VOLLINGER C, 2003, THESIS TU BERLIN