CAJ | 학술논문

本文从第一性原理出发,计算了充磁线圈产生的磁场,脉冲充磁的超导圆盘中的感应电流密度和俘获场分布.以超导体中的电流运动方程为基础,通过磁通动力学方程E=Ec(J/Jc)n和物质方程B=μ0H表示超导圆盘的超导特性.计算表明第一个脉冲充磁电流的峰值和磁通蠕动指数对于超导圆盘中的感应电流分布非常重要.同时研究了充磁电流的宽度,波形,第二个充磁电流的峰值和充磁线圈的形状对于俘获场的影响.计算表明不断减小脉冲充磁电流峰值的反复充磁可以保持超导圆盘中的感应电流密度的平台在一确定水平.
본문종제일성원리출발,계산료충자선권산생적자장,맥충충자적초도원반중적감응전류밀도화부획장분포.이초도체중적전류운동방정위기출,통과자통동역학방정E=Ec(J/Jc)n화물질방정B=μ0H표시초도원반적초도특성.계산표명제일개맥충충자전류적봉치화자통연동지수대우초도원반중적감응전류분포비상중요.동시연구료충자전류적관도,파형,제이개충자전류적봉치화충자선권적형상대우부획장적영향.계산표명불단감소맥충충자전류봉치적반복충자가이보지초도원반중적감응전류밀도적평태재일학정수평.
The distribution of the induced current density and the profile of the trapped magnetic field in a superconducting-disk magnetized by magnetic pulses are calculated from first principles. The effect of the superconducting parameters is taken into account by the voltage-current law and the material law. The amplitude of the first magnetic pulse is the key factor to determine the distribution of the induced current density in the superconducting-disk, and the height of the induced current density plateau only depends on the flux creep exponent, regardless of the shape of the magnetizing coil. The iterative magnetic pulses with reducing amplitudes can keep the height of the induced current density plateau in a certain level.