标题： 电子与捕获离子之间的弹性碰撞中的能量传递 显示英文标题

标题： Energy transfer in elastic collisions between electrons and trapped ions

摘要： 被穿过捕获势的自由电子与俘获离子云相互作用引起的离子云加热现象已被观察到。 提出了一个描述该过程的模型并进行了讨论。 所提出的方法预测了两种效应：电子对离子集合的推动和加热。 前者被认为太弱而无法观察，但后者已通过实验进行研究。 为了比较实验结果与理论预测，对不同温度下的各种离子集合进行了分子动力学模拟，以确定离子云几何形状与其温度之间的关系。 定义并确定了加热速率系数以及被电子轰击的离子云温度。 发现这两个量之间存在良好的相关性，这与所提出的模型一致。 显示英文摘要

摘要： Heating of trapped ion clouds by interactions with free electrons crossing the trapping potential was observed. A model describing such process was proposed and discussed. The presented approach predicts two effects: pushing and heating of the ions' ensemble by electrons. The former was found to be too weak for observation, however the latter was investigated experimentally. For comparison between experimental results and theoretical predictions, molecular dynamics simulations for various ion ensembles in various temperatures were performed to determine dependence between ion cloud geometry and its temperature. A heating rate coefficient was defined and determined together with temperatures of ion clouds bombarded with electrons. Good correlation between the two quantities was found, which agrees with the proposed model.