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Development of High Field Superconducting Magnet for High Energy Accelerator

高能加速器用高场超导磁体的研制

基本信息

批准号：
13440085
负责人：
TSUCHIYA Kiyosumi
金额：
$ 8.58万
依托单位：
The High Energy Accelerator Research Organization
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

In order to pursue the particle physics in the energy frontier, superconducting magnets for the high-energy accelerator are very important equipment, and they must be high-field and high-quality magnets. The Large Hadron Collider (LHC), presently under construction at CERN, will employ more than 6000 superconducting magnets. In the framework of the LHC collaboration program between CERN and Japan, the High Energy Accelerator Research Organization, KEK, has been developed and fabricated the 16 superconducting insertion quadrupole magnets for the LHC interaction regions. After initial running of the LHC, the quest will continue to extend the discovery potential of new particles and to increase the precision of measurements of particle characteristics. This will be only achieved by upgrading the accelerator and it will require higher field superconducting magnets. As a first step of the development, we performed two investigations: 1) studies on the various characteristics of the mass production magnets. 2) development of the high field superconducting wires (rapid heating, quenching, and transforming processed Nb_3Al wires).In the former studies, we obtained a lot of mechanical and electromagnetic data of the mass production quadrupoles during the cool-down and excitation test, and the field measurement. These data will be very valuable and useful for the future high field magnet development. In the latter studies, we performed the basic research to obtain the higher Jc in the region of 1015 T. Although we could not reached the target Jc (2000 A/mm^2 at 10 T, 4.2 K), it was found that the characteristics of the Nb_3Al wires at the low field (1015 T), which has not been studied before, were slightly different from that of the high field (> 20 T). The data obtained through this study will give us useful information for the further development of the high field superconducting wires.

为了追求能源前沿的粒子物理，高能加速器用超导磁体是非常重要的设备，而且必须是高场强、高质量的磁体。目前欧洲核子研究组织 (CERN) 正在建造的大型强子对撞机 (LHC) 将使用 6000 多个超导磁体。在 CERN 和日本大型强子对撞机合作计划的框架内，高能加速器研究组织 (KEK) 开发并制造了用于大型强子对撞机相互作用区域的 16 个超导插入四极磁体。大型强子对撞机首次运行后，将继续扩大新粒子的发现潜力，并提高粒子特征测量的精度。这只能通过升级加速器来实现，并且需要更高磁场的超导磁体。作为开发的第一步，我们进行了两项研究：1）研究量产磁体的各种特性。 2）高场超导线材（快速加热、淬火、转变加工Nb_3Al线材）的研制。在前期的研究中，我们在量产四极杆的冷却、励磁试验和现场测量过程中获得了大量的力学和电磁数据。这些数据对于未来高场磁体的发展非常有价值和有用。在后面的研究中，我们进行了基础研究，以在1015 T区域获得更高的Jc。虽然我们无法达到目标Jc（10 T，4.2 K时2000 A/mm^2），但发现Nb_3Al线在低场（1015 T）下的特性与高场（> 20 T）略有不同，这是以前没有研究过的。通过这项研究获得的数据将为我们进一步开发高场超导线材提供有用的信息。