The high-temperature superconducting magnetic lens developed by the Institute of High Energy Physics of the Chinese Academy of Sciences for Shanghai Jiaotong University completed the magnetic field measurement in Shanghai. The magnetic field distribution results meet the design requirements and will be used for the assembly and assembly of the electron microscope.
Electron microscopy is an electron optics used in atomic-scale ultra-high-resolution space-time megavolt electron diffraction and imaging systems to identify crystal structures, microstructures, chemical compositions, chemical bonds, and electron distribution in microdomains using signals generated by the action of electrons and matter. Device. Focusing electrons with a magnetic lens made of a superconducting magnet is an important component in an electron microscope lens barrel.
Supporting the development of high-end scientific research instruments is one of the strategic cooperation contents signed by the High Energy Institute and Shanghai Jiaotong University. The Superconducting Magnet Engineering Center of the Experimental Physics Center has undertaken specific work.
The high-temperature superconducting magnetic lens is the first magnetic lens used in the world as a high-precision superconducting magnet. It uses a domestic high-temperature superconducting tape to wrap a magnet, and does not use a liquid or cryogenic medium such as liquid nitrogen. The magnet is cooled by conduction cooling, and the maximum working temperature is about 50K. The use of high-temperature superconducting technology will increase the resolution of the electron microscope, reduce the volume and weight of the entire device, and improve integration.
The high-temperature superconducting magnetic lens is also the first high-temperature superconducting magnet developed by High Energy. The related technology will promote the development of high-end electron microscope instruments in China.
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