电感对脉冲同轴加速器等离子体聚焦参数的影响

IF 0.2 Q4 PHYSICS, MULTIDISCIPLINARY Recent Contributions to Physics Pub Date : 2021-06-15 DOI:10.26577/rcph.2021.v78.i3.07
B. Useinov, A. Solodovnik, S. Zhumabayeva
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摘要

基于对脉冲等离子体加速器中发生的过程的物理分析,证明了它们用于创建和研究等离子体焦点的可能性。特别是,研究了电感对基于脉冲同轴加速器创建的千焦范围“等离子体聚焦”(PF)装置中等离子体聚焦参数的影响。在此基础上,在不考虑火花隙和导线参数的情况下,分析了电路电感和电容器组电容对最大电流和中子输出值的影响,提出并论证了等效安装方案。根据对装置电感的理论估计,计算出其最可能值。事实证明,在所考虑的能量范围内的安装中,电感约为7.5•10­7 Gn,取决于电容器组的电容。相反,在具有兆焦能量的装置中,电感不取决于电容器的数量和容量,因此电容器的增加不会影响电流强度的增加。获得了在电容器组的不同电容下放电电流对施加电压的实验和理论依赖关系。对理论电流波形和实验电流波形进行了比较分析。理论和实验结果的最大一致性是在放电脉冲T=30微秒的持续时间内发现的。
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Effect of inductance on the parameters of the plasma focus in a pulsed coaxial accelerator
Based on the physical analysis of the processes occurring in pulsed plasma accelerators, the pos­sibility of their use for the creation and study of a plasma focus is justified. In particular, the influence of inductance on the parameters of the plasma focus in kilojoule­range «Plasma focus» (PF) installations created on the basis of a pulsed coaxial accelerator is studied. An equivalent installation scheme is proposed and justified, based on the analysis of which the influence of the inductance of the circuit and the capacitance of the capacitor bank on the value of the maximum current and neutron output is analyzed, without taking into account the parameters of the spark gap and the conducting wires. Based on the theoretical estimate of the inductance of the installation, its most probable value is calculated. . It turned out that in the installations of the considered energy range, the inductance is approximately 7.5•10­7 Gn and depends on the capacitance of the capacitor bank. On the contrary, in installations with megajoule energy, the inductance does not depend on the number and capacity of capacitors, so that an increase in the latter does not affect the increase in current strength. Experimental and theoretical dependences of the discharge current on the applied voltage at different capacitances of the capacitor bank are obtained. A comparative analysis of theoretical and experimental current waveforms is pre­sented. The greatest coincidence of theoretical and experimental results was found for the duration of the discharge pulse T = 30 microseconds.
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