Performance of a Nb3Sn Quadrupole Under High Stress

被引：29

作者：

Felice, H. ^{[1
]}

Bajko, M. ^{[2
]}

Bingham, B. ^{[1
]}

Bordini, B. ^{[2
]}

Bottura, L. ^{[2
]}

Caspi, S. ^{[1
]}

De Rijk, G. ^{[2
]}

Dietderich, D. ^{[1
]}

Ferracin, P. ^{[1
]}

Giloux, C. ^{[2
]}

Godeke, A. ^{[1
]}

Hafalia, R. ^{[1
]}

Milanese, A. ^{[2
]}

Rossi, L. ^{[2
]}

Sabbi, G. L. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[2] CERN, CH-1211 Geneva 23, Switzerland

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2011年 / 21卷 / 03期

关键词：

Current cycling; high mechanical stress; Nb3Sn quadrupole;

D O I：

10.1109/TASC.2010.2090116

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：

Future upgrades of the Large Hadron Collider (LHC) will require large aperture and high gradient quadrupoles. Nb3Sn is the most viable option for this application but is also known for its strain sensitivity. In high field magnets, with magnetic fields above 12 T, the Lorentz forces will generate mechanical stresses that may exceed 200 MPa in the windings. The existing measurements of critical current versus strain of Nb3Sn strands or cables are not easily applicable to magnets. In order to investigate the impact of high mechanical stress on the quench performance, a series of tests was carried out within a LBNL/CERN collaboration using the magnet TQS03 (a LHC Accelerator Research Program (LARP) 1-meter long, 90-mm aperture Nb3Sn quadrupole). The magnet was tested four times at CERN under various pre-stress conditions. The average mechanical compressive azimuthal pre-stress on the coil at 4.2 K ranged from 120 MPa to 200 MPa. This paper reports on the magnet performance during the four tests focusing on the relation between pre-stress conditions and the training plateau.

引用

页码：1849 / 1853

页数：5

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