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Numerical Analysis of Electron Energy Distribution Function and Its Effects on the H? Production in Linac4 H? Source

机译:电子能量分布函数的数值分析及其对H的影响?在LinaC4 H生产?来源

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In order to enhance the H? surface production in hydrogen negative ion sources, it is important to increase the density of the H atoms dissociated from H2 molecule and the resultant atomic flux towards the surface of the plasma grid. In this paper, the effect of the Electron Energy Distribution Function (EEDF) on the dissociation of H2 in Linac4 H? source has been studied using Electromagnetic Particle In Cell (EM-PIC) simulation with Monte Carlo method for Collision Processes (MCC). It has been shown that the rate coefficient of dissociation reactions can be enhanced in the lower H2 gas pressure regime, while the H atom production rate becomes larger in the higher pressure regime. It is suggested that the optimal H2 gas pressure to maximize the H atom production is determined by the balance of rate coefficient and the H2 density.
机译:为了增强h ? 表面产生在氢负离子源中,重要的是增加从H 2 / sum>分子中解离的H原子的密度并朝向等离子体栅格的表面上朝向等离子体栅格的表面。在本文中,电子能量分布函数(EEDF)对LinaC4H 中H 2 解离的影响。已经使用Cell(EM-PIC)模拟中使用电磁粒子进行了研究的源,用于碰撞过程(MCC)的Monte Carlo方法。已经表明,在下部H 2 气体压力调节中可以增强解离反应的速率系数,而H原子生产率在较高的压力方案中变大。建议最佳H <亚> 2 气体压力以最大化H原子产生由速率系数的平衡和H 2 密度决定。

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