10 GHz最小B四极永磁体电子回旋共振离子源的设计
Design of a 10 GHz minimum-B quadrupole permanent magnet electron cyclotron resonance ion source
摘要：
本文对一个具有最小B四极磁场拓扑结构的永磁体电子回旋共振离子源（ECRIS）进行了模拟研究。使磁场符合常规ECRIS，其中$B_\textrm{min}/B_\textrm{ECR}$为0.67，并且在10 GHz下最后闭合的磁等值面为1.86 $B_\textrm{ECR}$。平行于场的磁场梯度的分布，影响电子加热效率，覆盖从0到13 T/m的范围，类似于传统的ECRIS。因此，预期新型离子源产生大量的暖电子和高电荷态离子。单电子跟踪模拟用于估计等离子体室壁上的等离子体通量分布，并提供在提取狭缝处的离子密度分布的估计，然后用于离子光学模拟，证明通过低能量束传输的高传输。所设计的离子源的目的是研究，如果四极场拓扑结构可以产生高电荷态光束在可比的强度，以传统的ECRIS和有效地传输它们通过一个低能量束线，从而铺平了道路，超导ARC ECRIS使用相同的字段拓扑结构。最后讨论了该离子源作为单端加速器注入器用于离子束分析的前景。
英文摘要：
This paper presents a simulation study of a permanent magnet electron cyclotron resonance ion source (ECRIS) with a minimum-B quadrupole magnetic field topology. The magnetic field is made to conform to conventional ECRIS with $B_\textrm{min}/B_\textrm{ECR}$ of 0.67 and a last closed magnetic isosurface of 1.86$B_\textrm{ECR}$ at 10 GHz. The distribution of magnetic field gradients parallel to the field, affecting the electron heating efficiency, cover a range from 0 to 13 T/m, being similar to conventional ECRIS. Therefore it is expected that the novel ion source produces warm electrons and high charge state ions in significant number. Single electron tracking simulations are used to estimate plasma flux distribution on the plasma chamber walls and to provide an estimate of the ion density profile at the extraction slit then used in ion optical simulations demonstrating high transmission through the low energy beam transport. The designed ion source is intended to study if the quadrupole field topology could produce high charge state beams in comparable intensities to conventional ECRIS and efficiently transport them through a low energy beamline, thus paving the way for a superconducting ARC-ECRIS using the same field topology. Furthermore, the prospects of the presented ion source design as an injector of a single-ended accelerator for ion beam analysis are discussed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
