Abstract

The collective acceleration of laser plasma ions in a rapidly increasing magnetic field (10⁸ T/s) excited by a powerful current pulse in a low-inductive conical spiral expanding in the direction of plasma acceleration has been studied. A mathematical model and an algorithm for calculating the radial B_r and axial B_z components of the magnetic field in the approximation of a conical spiral by a system of rings of variable radius are proposed to analyze the factors affecting the efficiency of such acceleration. Based on computer modeling and an experimental variation of magnetic-field excitation parameters, the regime of effective ion acceleration is obtained. With the help of time-of-flight collector measurements, the velocities of ions whose atomic mass differs by two orders of magnitude are determined. The maximum velocity of both light ions (lithium) and heavy ions (lead) exceeds 10⁶ m/s, and the corresponding energy for lead ions is ~1 MeV. The efficiency of collective acceleration with the direct acceleration of laser plasma ions in a high-current high-voltage diode with magnetic insulation is compared.

中文翻译：

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离子能量高达1 MeV的激光等离子体紧凑型感应加速器

摘要

研究了在等离子体感应力方向扩展的低电感锥形螺旋中，由强大的电流脉冲激发的快速增加的磁场（10 ⁸ T / s）中激光等离子体离子的集体加速。计算径向B _r和轴向B _z的数学模型和算法提出了通过变半径环系统近似圆锥形螺旋的磁场分量，以分析影响这种加速效率的因素。基于计算机建模和磁场激励参数的实验变化，获得了有效离子加速的机制。借助飞行时间收集器测量，可以确定原子质量相差两个数量级的离子的速度。轻离子（锂）和重离子（铅）的最大速度都超过10 ⁶ m / s，铅离子的相应能量为〜1 MeV。比较了具有磁绝缘的高电流高压二极管中激光等离子体离子直接加速时集体加速的效率。