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一种脉冲强电流条件下导线电阻测量方法

王为武 单连强 田超 袁宗强 张锋 邓志刚 张天奎 滕建 刘东晓 曹磊峰 周维民 谷渝秋

王为武, 单连强, 田超, 等. 一种脉冲强电流条件下导线电阻测量方法[J]. 强激光与粒子束, 2020, 32: 082001. doi: 10.11884/HPLPB202032.200057
引用本文: 王为武, 单连强, 田超, 等. 一种脉冲强电流条件下导线电阻测量方法[J]. 强激光与粒子束, 2020, 32: 082001. doi: 10.11884/HPLPB202032.200057
Wang Weiwu, Shan Lianqiang, Tian Chao, et al. A method for estimating coil resistance with pulsed strong electric current[J]. High Power Laser and Particle Beams, 2020, 32: 082001. doi: 10.11884/HPLPB202032.200057
Citation: Wang Weiwu, Shan Lianqiang, Tian Chao, et al. A method for estimating coil resistance with pulsed strong electric current[J]. High Power Laser and Particle Beams, 2020, 32: 082001. doi: 10.11884/HPLPB202032.200057

一种脉冲强电流条件下导线电阻测量方法

doi: 10.11884/HPLPB202032.200057
基金项目: 国家自然科学基金青年基金项目(11905203);等离子体物理重点实验室基金项目(6142A0401040217)
详细信息
    作者简介:

    王为武(1986—),男,助理研究员,从事超强激光与等离子体相互作用研究;wangweiwu_wl@126.com

    通讯作者:

    周维民(1978—),男,研究员,从事激光等离子体物理研究;zhouweimin@gmail.com

    谷渝秋(1968—),男,研究员,从事强场物理研究;yqgu@caep.ac.cn

  • 中图分类号: O539

A method for estimating coil resistance with pulsed strong electric current

  • 摘要: 在超强激光辐照电容线圈靶产生强磁场实验中,在约50 ps时,线圈电流达到20 kA以上。通过该实验结果与磁场产生理论模型对比,可得出该导线电阻值比常温直流电阻高出3个量级。对导线材料电阻率与趋肤效应的分析结果表明,该电阻值在量级上是合理的。获得超快脉冲强电流条件下的导线电阻值,有助于更深入理解线圈靶产生强磁场过程。
  • 图  1  激光辐照电容线圈靶产生强磁场的原理示意图

    Figure  1.  Magnetic field generated by laser irradiating capacitor-coil target

    图  2  三发次实验获得的电流随时间变化关系

    Figure  2.  Current in the coil inferred by proton radiography in three shots

    图  3  通过磁场产生模型,得到不同导线电阻值和激光到电子能量转化率h条件下的电流随时间变化过程

    Figure  3.  Currents in the coil from the numerical model with different coil resistances and the fractions h of laser energy absorbed by the electrons

    图  4  由文献[25]公式(7)得到Al电阻率在1 eV~100 eV条件下随温度变化曲线

    Figure  4.  Resistivity of Al changes with temperature from Eq.(7)of Ref. [25],the fit is good at temperature from 1 eV to 100 eV

    图  5  导线电阻为50 Ω时,导线通过电阻加热获得的总能量随时间变化曲线

    Figure  5.  Ohmic heating energy changes with time when coil resistance is 50 Ω

    表  1  近几年实验激光条件及磁场结果

    Table  1.   Laser parameters and the corresponding magnetic field results in recent years

    laser facilitylaser parametersmagnetic fielddiagnostic methoddata origin
    energy/Jwavelengthintensity/(W/cm2
    GEKKO-XII,Japan10001×10151.5 kT@650 μmFaraday rotationFujioka,2013[16]
    LULI pico 2000,France5001×1017~800 TB-dot probeSantos,2015[17]
    GEKKO-LFEX,Japan8803×1016610 Tproton radiographyLaw,2016[18]
    OMEGA,USA25003×101650 Tproton radiographyLan Gao,2016[19]
    OMEGA,USA7504.5×1015210 Tproton radiographyGoyon,2017[20]
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-03-05
  • 修回日期:  2020-05-13
  • 刊出日期:  2020-08-13

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