非理想氢原子束真空环境长程传输模拟研究

模拟研究了非理想氢原子束在真空环境下的长程传输效应。根据中性化程度的不同，将非理想束分为欠中性束和过中性束。通过建立束流传输的准电磁模型，研究了束流密度、中性化因子、空间磁场和弹性散射等因素对非理想氢原子束的影响。结果表明:对于欠中性束，负氢离子的存在对氢原子的传输几乎没有影响，因此欠中性束的发射装置可以考虑去除偏置磁场，以减小设备体积和质量；对于过中性束，束流损失率与束流密度和中性化因子有关，即束流密度越大，束流损失越大；中性化因子越高，束流损失就越高；而无论是欠中性束还是过中性束，空间磁场和粒子间的弹性散射对其传输都没有影响。

Simulation of long-range transport of non-ideal hydrogen atom beams in vacuum environment

Neutral beam has potential applications in space debris cleanup and space exploration. As that neutral beam prepared by ion source is not ideal in practice, this paper simulates the long-range transmission effect of non-ideal hydrogen beam in vacuum environment. According to the degree of neutralization, non-ideal beams are divided into under-neutral beams and over-neutral beams. The effects of beam density, neutralization factor, spatial magnetic field and elastic scattering on the nonideal hydrogen beam are studied by establishing a quasi-electromagnetic model of beam transmission. The results show that the presence of negative hydrogen ions has no effect on the transmission of hydrogen atoms in the under-neutral beam, thus the bias magnetic field can be removed to reduce the volume and mass of the device. For the over-neutral beam, the loss ratio is related to the beam density and neutralization factor, that is, the higher the beam density, the greater the beam loss; the higher the neutralization factor, the higher the beam loss. The magnetic field and the elastic scattering between particles have no effect on the propagation of either the under-neutral or over-neutral beams.