论文标题

高光度LHC的倾斜孔孔 - 透明轨道校正器的设计

Design of a Canted-cosine-theta orbit corrector for the High Luminosity LHC

论文作者

Pepitone, K., Kirby, G., Ruber, R., Ahl, A., Canale, M., Dugic, I., Gentini, L., Johansson, M., Karlsson, G., Kovacikova, J., Lindström, J., Olsson, A., Olvegård, M.

论文摘要

高光度LHC需要将偶极轨道校正器分组为双光孔磁铁组件。它们以70毫米的孔径为100 a提供3.1 t的场。当前的标准设计是用色带电缆制成的古典余弦布局。但是,色带电缆的电绝缘材料不足以承受未来LHC操作的几年中预期的辐射负荷。基于使用聚酰亚胺绝缘子的耐辐射电缆的新设计,可以在其末期终止替代现有的轨道校正器。面临的挑战是设计一种直接适合现有位置的磁铁,并且可以使用与现有磁铁相同的母线,被动淬火保护和电源。我们提出了一个自我保护的cosine-theta(CCT)设计。我们借此机会探索CCT设计的新概念,以更具可持续的资源利用来生产具有成本效益和高质量的设计。新的轨道校正器设计满足了现场质量的高要求,同时保持在相同的机械量和最大激发电流之内。 瑞典大学和瑞典产业的合作是为了减少产生功能性CCT磁铁所需的时间的同时工程(CE)方法的开发和生产原型磁铁的开发和生产。磁铁的长CCT偶极子布局由两个线圈组成。超导体是一种在6个环1电缆的市售的0.33毫米电线。确定CCT布局的线圈组中的通道允许2 x 5电缆层。总共70个绕组使线圈电流可以保持在100以下A。我们将介绍详细的设计和初步淬火模拟。

The High Luminosity LHC requires dipole orbit correctors grouped in double aperture magnet assemblies. They provide a field of 3.1 T at 100 A in an aperture of 70 mm. The current standard design is a classical cosine-theta layout made with ribbon cable. However, the electric insulation of the ribbon cable is not radiation-resistant enough to withstand the radiation load expected in the coming years of LHC operation. A new design, based on a radiation-resistant cable with polyimide insulator, that can replace the existing orbit correctors at their end-of-life, is needed. The challenge is to design a magnet that fits directly into the existing positions and that can operate with the same busbars, passive quench protection, and power supplies as existing magnets. We propose a self-protected canted-cosine-theta (CCT) design. We take the opportunity to explore new concepts for the CCT design to produce a cost-effective and high-quality design with a more sustainable use of resources. The new orbit corrector design meets high requirements on the field quality while keeping within the same mechanical volume and maximum excitation current. A collaboration of Swedish universities and Swedish industry has been formed for the development and production of a prototype magnet following a concurrent engineering (CE) methodology to reduce the time needed to produce a functional CCT magnet. The magnet has a 1 m long CCT dipole layout consisting of two coils. The superconductor is a commercially available 0.33 mm wire with polyimide insulation in a 6-around-1 cable. The channels in the coil formers, that determine the CCT layout, allow for 2 x 5 cable layers. A total of 70 windings makes that the coil current can be kept below 100 A. We will present the detailed design and preliminary quench simulations.

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