Chinese Physics C > 2005, Vol. 29 > Issue(10): 989-992

Magnetic Shield for the Vertical Test System of Superconducting Cavity

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

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Abstract：
In this paper the influence of the space magnetic field on the performance of a superconducting niobium bulk cavity is introduced briefly. And an effective magnetic shielding method for superconducting cavity vertical test is presented. The initial permeabilities of eight different kinds of Fe-Si and Fe-Ni materials at liquid helium or liquid nitrogen temperature has been measured to compare with those at room temperature. The measurement data are given also. Based on it a double layers cylinder magnetic shield has been developed for the cryostat of 1.3GHz superconducting cavity.

References

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. Hasan Padamsee, Jens Knobloch, Tom Hays. RF Superconductivity for Accelerators. New York:Cornell University Ithaca, 1998. 6—72. Aune B, Bandelmann R, Bloess D et al. Superconducting TESLA Cavities. Physical Review Special Topics Accelerators and Beams, 2000, 3: 092001-33. ZHANG Yu-Heng. Superconductivity Physics. Hefei: University of Science and Technology of China Publisher, 1997.250—252(in Chinese)(张玉恒.超导物理.合肥:中国科学技术大学出版社,1997.250-252)4. Hasan Padamsee, Jens Knobloch, Tom Hays. RF Superconductivity for Accelerators. New York:Cornell University Ithaca, 1998. 173—1755. LUO Guo-Hui. Lecture Note for Superconducting RF. The 2nd OCPA Accelerator School. Huangshan, China, July,2000. 11—126. Kenji Saito. Ouick Vertical Test System for L-band Superconducting RF Cavity. Proceeding of the 21st Linear Accelerator Meeting. Tokyo, Japan 1996

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SUN Hong, ZHAO Sheng-Chu and GE Ming-Qi. Magnetic Shield for the Vertical Test System of Superconducting Cavity[J]. Chinese Physics C, 2005, 29(10): 989-992.

SUN Hong, ZHAO Sheng-Chu and GE Ming-Qi. Magnetic Shield for the Vertical Test System of Superconducting Cavity[J]. Chinese Physics C, 2005, 29(10): 989-992. shu

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Received: 2004-10-26
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Magnetic Shield for the Vertical Test System of Superconducting Cavity

Corresponding author:SUN Hong,

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

Received Date:2004-10-26
Accepted Date:1900-01-01
Available Online:2005-10-05

Abstract:In this paper the influence of the space magnetic field on the performance of a superconducting niobium bulk cavity is introduced briefly. And an effective magnetic shielding method for superconducting cavity vertical test is presented. The initial permeabilities of eight different kinds of Fe-Si and Fe-Ni materials at liquid helium or liquid nitrogen temperature has been measured to compare with those at room temperature. The measurement data are given also. Based on it a double layers cylinder magnetic shield has been developed for the cryostat of 1.3GHz superconducting cavity.