Design of 11 T Twin-Aperture Nb3Sn Dipole Demonstrator Magnet for LHC Upgrades
Design of 11 T Twin-Aperture Nb3Sn Dipole Demonstrator Magnet for LHC Upgrades
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DOI：
10.1109/tasc.2011.2177625
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发表时间：
2012-06-01
影响因子：
1.8
通讯作者：
Zlobin, A. V.
中科院分区：
文献类型：
--
作者：
Karppinen, M.;Andreev, N.;Zlobin, A. V.
LHC准直升级计划在点2,3和7的色散抑制区域安装两个额外的准直器。为了获得准直器所需的纵向空间，人们正在考虑以11t偶极子代替8.33 T LHC主偶极子的解决方案。欧洲核子研究中心和FNAL已经启动了一项联合开发计划，以证明Nb3Sn技术为此目的的可行性。该项目从开发和测试一个2米长的单孔径示范磁铁开始。第二阶段的目标是设计和建造一系列2米长的双孔径演示磁铁，标称磁场为11 T，电流为11.85 kA。本文介绍了电磁设计，并对Nb3Sn线圈的磁场质量进行了预测，包括铁轭的饱和和恒流效应。本文还讨论了基于分离线圈的机械设计概念，这些线圈组装在垂直分离的铁轭中。
The LHC collimation upgrade foresees two additional collimators installed in the dispersion suppressor regions of points 2, 3 and 7. To obtain the necessary longitudinal space for the collimators, a solution based on an 11 T dipole as replacement of the 8.33 T LHC main dipoles is being considered. CERN and FNAL have started a joint development program to demonstrate the feasibility of Nb3Sn technology for this purpose. The program started with the development and test of a 2-m-long single-aperture demonstrator magnet. The goal of the second phase is the design and construction of a series of 2-m-long twin-aperture demonstrator magnets with a nominal field of 11 T at 11.85 kA current. This paper describes the electromagnetic design and gives a forecast of the field quality including saturation of the iron yoke and persistent-current effects in the Nb3Sn coils. The mechanical design concepts based on separate collared coils, assembled in a vertically split iron yoke are also discussed.