系统电磁脉冲一维边界层的数值模拟
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摘要
应用准第一性原理的PIC程序对系统电磁脉冲(SGEMP)一维边界层进行数值模拟,研究无限大介质板发射单一能量为2keV、发射率为3.3×1020 m~(-2)·s~(-1)的光电子,发射角分布为余弦角分布,且平板上留下等量正电荷时的SGEMP效应,得出稳态后电子所能到达的最大距离约在5.8~7.5cm之间振荡;发射表面z=0处的电荷密度在(6.0~9.0)×10~(-6)C/m~3之间振荡;表面电场值在50~55kV/m之间振荡;边界层达到准稳态的时间约为14.0ns。将稳态模拟结果和理论估算结果进行对比,模拟结果较理论结果更加准确、形象地反映出SGEMP一维边界层的形成过程及稳态结构。
The one-dimensional system generated electromagnetic pulse(SGEMP)boundary layer is simulated by PIC code of quasi-first principle.The SGEMP effects of monoenergetic emission model are studied—the photoelectrons are emitted normally at 3.3×1020 m~(-2)·s~(-1) all with 2 keV energy from infinitely large dielectric plane while positive charges are left on the plane.When the steady state is reached,the maximum distance the electrons travel is oscillating between 5.8 cm and 7.5 cm,the charge density at z=0 is oscillating within(6.0-9.0)×10~(-6) C/m~3 and electric field at the surface is 50-55 kV/m.The build-up time of quasi-steady state is 14.0 ns.The simulation results of steady state accord with the theoretic results,and the simulation results could image the forming process and the adiabatic oscillation of the steady state more clearly than the theoretic results.The modeling by PIC code to study SGEMP effects is validated.
The one-dimensional system generated electromagnetic pulse(SGEMP)boundary layer is simulated by PIC code of quasi-first principle.The SGEMP effects of monoenergetic emission model are studied—the photoelectrons are emitted normally at 3.3×1020 m~(-2)·s~(-1) all with 2 keV energy from infinitely large dielectric plane while positive charges are left on the plane.When the steady state is reached,the maximum distance the electrons travel is oscillating between 5.8 cm and 7.5 cm,the charge density at z=0 is oscillating within(6.0-9.0)×10~(-6) C/m~3 and electric field at the surface is 50-55 kV/m.The build-up time of quasi-steady state is 14.0 ns.The simulation results of steady state accord with the theoretic results,and the simulation results could image the forming process and the adiabatic oscillation of the steady state more clearly than the theoretic results.The modeling by PIC code to study SGEMP effects is validated.
引文
[1]王泰春,贺云汉,王玉芝.电磁脉冲导论[M].北京:国防工业出版社,2011.(Wang Taichun,He Yunhan,Wang Yuzhi.Introduction to electromagnetic pulse.Beijing:National Defense Industry Press,2011)
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[5]Carron N J,Longmire C L.Scaling behavior of the time-dependent SGEMP boundary layer[J].IEEE Trans Nuclear Science,1978,25(6):1329-1335.
[6]周辉,李宝忠,王立君,等.不同注量X射线系统电磁脉冲响应的数值计算[J].计算物理,1999,16(2):157-161.(Zhou Hui,Li Baozhong,Wang Lijun,et al.The calculation of SGEMP response in various ranges of X-ray fluence.Chinese Journal of Computational Physics,1999,16(2):157-161)
[7]程引会,周辉,李保忠,等.光电子发射引起的柱腔内系统电磁脉冲的模拟[J].强激光与粒子束,2004,16(8):1029-1032.(Cheng Yinhui,Zhou Hui,Li Baozhong,et al.Simulation of system-generated electromagnetic pulse caused by emitted photoelectron in cavity.High Power Laser and Particle Beams,2004,16(8):1029-1032)
[8]周辉,程引会,李宝忠,等.系统电磁脉冲边界层准稳态特性研究[J].强激光与粒子束,2001,13(1):72-75.(Zhou Hui,Cheng Yinhui,Li Baozhong,et al.Characteristics of steady-state SGEMP boundary layer.High Power Laser and Particle Beams,2001,13(1):72-75)
[9]Karzas W J,Latter R.Electromagnetic radiation from a nuclear explosion in space[J].Phys Rev,1962,126(6):1919-1926.
[2]Wenaas E P,Rogers S.Sensitivity of SGEMP to input parameters[J].IEEE Trans Nuclear Science,1975,22(6):2362-2367.
[3]Woods A J,Wennas E P.Scaling laws for SGEMP[J].IEEE Trans Nuclear Science,1976,23(6):1903-1908.
[4]Higgins D F,Lee K S H,Marin L.System-generated EMP[J].IEEE Trans Antennas and Propagation,1978,26(1):14-22.
[5]Carron N J,Longmire C L.Scaling behavior of the time-dependent SGEMP boundary layer[J].IEEE Trans Nuclear Science,1978,25(6):1329-1335.
[6]周辉,李宝忠,王立君,等.不同注量X射线系统电磁脉冲响应的数值计算[J].计算物理,1999,16(2):157-161.(Zhou Hui,Li Baozhong,Wang Lijun,et al.The calculation of SGEMP response in various ranges of X-ray fluence.Chinese Journal of Computational Physics,1999,16(2):157-161)
[7]程引会,周辉,李保忠,等.光电子发射引起的柱腔内系统电磁脉冲的模拟[J].强激光与粒子束,2004,16(8):1029-1032.(Cheng Yinhui,Zhou Hui,Li Baozhong,et al.Simulation of system-generated electromagnetic pulse caused by emitted photoelectron in cavity.High Power Laser and Particle Beams,2004,16(8):1029-1032)
[8]周辉,程引会,李宝忠,等.系统电磁脉冲边界层准稳态特性研究[J].强激光与粒子束,2001,13(1):72-75.(Zhou Hui,Cheng Yinhui,Li Baozhong,et al.Characteristics of steady-state SGEMP boundary layer.High Power Laser and Particle Beams,2001,13(1):72-75)
[9]Karzas W J,Latter R.Electromagnetic radiation from a nuclear explosion in space[J].Phys Rev,1962,126(6):1919-1926.