The influence of measurement and relaxation time on flux jumps in high temperature superconductors |
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| Authors: | Xiaobin Yang Youhe Zhou Shandong Tu |
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| Institution: | 1. School of Mechanical and Electrical Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu 213002, PR China;2. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, PR China;3. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, PR China |
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| Abstract: | The influence of the magnetization and relaxation time on flux jumps in high temperature superconductors (HTSC) under varying magnetic field is studied using the fundamental electromagnetic field equations and the thermal diffusion equation; temperature variety corresponding to flux jump is also discussed. We find that for a low sweep rate of the applied magnetic field, the measurement and relaxation times can reduce flux jump and to constrain the number of flux jumps, even stabilizing the HTSC, since much heat produced by the motion of magnetic flux can transfer into coolant during the measurement and relaxation times. As high temperature superconductors are subjected to a high sweep rate or a strong pulsed magnetic field, magnetization undergoes from stability or oscillation to jump for different pause times. And the period of temperature oscillation is equal to the measurement and relaxation time. |
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