In the frame of the High-Luminosity Large Hadron Collider construction and Future Circular Collider development program, the magnetic field in the accelerator dipole magnets is being enhanced to 11 T, and 15 T to 16 T level, respectively. Advanced Nb 3 Sn superconductors with a non-copper critical current density exceeding 2500 A mm −2 at 4.2 K and 12 T, are being developed using the Restacked-Rod-Process (RRP) and Powder-In-Tube (PIT) wire technologies. However, since Nb 3 Sn is extremely brittle, it is a significant challenge to construct the high-field dipole magnets with such very strain-susceptible superconductor. The high-level of stress acting on the wide face of the Rutherford cables in the coils of 120 MPa to 200 MPa generated by the Lorenz’ force, causes initially a reversible reduction and eventually at some stress level followed by permanent degradation of the critical current when strain goes to high. This study sets out to examine the cr...

中文翻译：

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高J c RRP和PIT类型的Nb 3 Sn卢瑟福加速器磁体电缆的横向压力敏感性

在高光度大型强子对撞机建设和未来圆形对撞机开发计划的框架内，加速器偶极磁体中的磁场分别提高到11 T和15 T到16T。使用重堆焊工艺（RRP）和管内粉末（PIT）线技术开发了非铜临界电流密度在4.2 K和12 T下超过2500 A mm -2的先进Nb 3 Sn超导体。 。但是，由于Nb 3 Sn非常脆，因此用这样的应变敏感性超导体构造高场偶极磁体是一项重大挑战。洛伦兹力在120 MPa至200 MPa的线圈中作用于卢瑟福电缆宽面上的高应力，最初导致可逆的减小，最终在一定的应力水平下引起，然后在应变变高时，临界电流永久性降低。这项研究着眼于研究...