H- 光电离及后续自由电子追踪的模拟研究
A Simulation of the Photoionization of H- Together with the Subsequent Tracking of the Liberated Electrons
AI总结：
为支撑费米实验室 PIP-II 超导直线加速器的非拦截式束流剖面测量设计，研究结合 CST 电磁仿真数据在 MATLAB 中构建仿真，实现 H- 光电离产生的自由电子的数量、位置计算及输运追踪。
摘要：
质子改进计划二期（Proton Improvement Plan - II，PIP-II）是费米实验室正在建造的新型直线加速器（LINAC）复合体，基于超导射频腔建造，可将 H- 离子加速至 800 MeV 动能后注入现有的增强器环。由于超导腔的存在，必须采用非拦截式方法测量沿直线加速器的束流剖面，所选方法为利用聚焦红外激光（又称激光丝）使少量 H- 发生光电离，测量电离电子数随激光在 H- 束流内位置的变化关系。为辅助收集机制的设计，研究人员基于商用电磁仿真软件 CST 的输入数据，在 MATLAB 中编写了仿真程序。该仿真可计算自由电子的数量和位置，并追踪它们穿过磁收集场与 H- 束流场到达收集点的过程，本文将展示直线加速器沿线多个位置的仿真结果。
英文摘要：
The Proton Improvement Plan - II (PIP-II) is a new linear accelerator (LINAC) complex being built at Fermilab. It is based on superconducting radiofrequency cavities and will accelerate H- ions to 800 MeV kinetic energy before injection into the existing Booster ring. Measurements of the profile of the beam along the LINAC must be done by non-intercepting methods due to the superconducting cavities. The method chosen is photoionization of a small number of H- by a focused infrared laser, aka laserwire. The number of ionized electrons is measured as a function of laser position within the H- beam. To aid in the design of the collection mechanism, a simulation was written in MATLAB with input from the commercial electromagnetic simulation, CST. This simulation calculates the number and positions of the liberated electrons and tracks them through the magnetic collection and H- beam fields to the collection point. Results from this simulation for various points along the LINAC will be shown.
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。
