论文标题
离子在惯性静电限制装置中的动力学特性
Kinetic characteristics of ions in an inertial electrostatic confinement device
论文作者
论文摘要
当涉及到任何设备的粒子行为开始偏离连续性时，动力学分析非常重要。在本研究中，使用粒子中的粒子（PIC）方法进行动力学模拟，以分析圆柱惯性静电限制融合（IECF）内部的离子的行为，该设备被开发为桌面中子源。在这里，通过放置在设备中心的腔室壁（阳极）和阴极（圆柱形格栅电线）之间的静电场（圆柱）之间的静电场加速。从模拟结果获得的等离子电位曲线表明，根据施加的阴极电位（从$ -1 $到$ -5〜KV $），阴极网格内部多个潜在的井结构形成。该设备核心区域的离子密度被发现为$ 10^{16} 〜m^{ - 3} $的订单，与实验观测非常相似。为了观察不同阴极电压下离子的特性，已经测量了离子能分布函数（IEDF）的空间变化。最后，比较模拟结果并发现与实验曲线非常吻合。目前的分析可以用作优化IECF设备中排放过程的技术参数的参考指南。
The kinetic analyses are quite important when it comes to understand the particle behavior in any device as they start to deviate from continuum nature. In the present study, kinetic simulations are performed using Particle-in-Cell (PIC) method to analyze the behavior of ions inside a cylindrical Inertial Electrostatic Confinement Fusion (IECF) device which is being developed as a tabletop neutron source. Here, the lighter ions, like deuterium are accelerated by applying an electrostatic field between the chamber wall (anode) and the cathode (cylindrical gridded wire), placed at the center of the device. The plasma potential profiles obtained from the simulated results indicate the formation of multiple potential well structures inside the cathode grid depending upon the applied cathode potential (from $-1$ to $-5~kV$). The ion density at the core region of the device is found to be of the order of $10^{16}~m^{-3}$, which closely resembles the experimental observations. Spatial variation of Ion Energy Distribution Function (IEDF) has been measured in order to observe the characteristics of ions at different cathode voltages. Finally, the simulated results are compared and found to be in good agreement with the experimental profiles. The present analysis can serve as a reference guide to optimize the technological parameters of the discharge process in IECF devices.
