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Strong magnetic field center developed 10T separation superconducting magnet for X-scattering device
[ Instrument Network Instrument Development ] The research team of Chen Wenge, a strong magnetic field science center, recently made important progress in the development of high-field separation superconducting magnets, and developed a room temperature aperture of 41 mm, a room temperature quilting width of 13 mm, and quilting. A high field separation superconducting magnet device with a degree of 2*85° and a center magnetic field strength of 10 Tesla.
The superconducting magnet in the magnet device is composed of four coaxial superconducting coils, that is, a pair of outer superconducting coils and a pair of inner superconducting coils are continuously wound by NbTi and Nb3Sn superconducting wires, respectively. to make. The development of isolated superconducting magnets with such technical indicators is challenging.
The technical difficulties are reflected in two aspects: on the one hand, according to the design requirements, it is necessary to obtain the magnetic field strength of 10T at the center of the quilting of the magnet device. It is difficult to realize the NbTi superconducting coil alone, and it is necessary to adopt the NbTi+Nb3Sn superconducting coil pair. The combination method, in which the development of the high field Nb3Sn densely wound superconducting coil pair is a technical difficulty in this project; on the other hand, under the action of strong magnetic field, the superconducting magnet will generate huge stress between the two pairs of separate coils (104kg). Magnitude), the design and fabrication of the support structure of the magnet is limited by the size of the space. The design and fabrication of the support structure limited by the space size is another technical difficulty in the development of the magnet.
The magnet device will be used in conjunction with an X-ray full scattering device to provide a magnetic field environment for studying microscopic crystal structure changes in materials under strong magnetic fields. The magnet device is an important part of the "X-ray full-scattering device under strong magnetic field", which is a research project of the Chinese Academy of Sciences. It has recently passed the technical acceptance review.
This special configuration of the split coil superconducting magnet device is compatible with the general powder X-ray diffractometer, and its successful development will also lay the foundation for the development of high field separation coil superconducting magnets for synchrotron radiation and neutron light sources.