高电荷态离子强库伦场中辐射跃迁过程的相对论效应研究

高电荷态离子强库伦场中的电子-离子碰撞过程是研究相对论效应的理想体系，对碰撞形成的激发态辐射跃迁过程开展深入研究，有利于等离子体辐射特性的模拟以及等离子状态的诊断研究。本项目将利用电子束离子阱装置开展强库伦场下的电子-离子碰撞实验，系统研究聚变等离子体状态精密诊断以及辐射特性研究关心的原子激发态退激发辐射光子的角分布和辐射跃迁几率，系统阐明Breit相互作用引起的相对论效应的细致物理机制，并研究其对等离子体X射线光谱学精密诊断的影响。研究成果将积极地推动强库伦场中原子碰撞物理理论与实验研究，高精度双电子复合伴线辐射特性的实验结果有望在原子碰撞领域实现QED效应的有效检验，并为ICF、天体等研究领域的高温等离子体精密诊断和辐射特性模拟提供原子参数。

The electron-ion collision process in strong Coulomb field of highly charged ions is an ideal system to study the relativistic effects. It is beneficial for the simulations of the plasma radiation properties and the diagnostics of the plasma state to study the raditative transitions of the excited states formed by collisions. This project is planned to carry out electron-ion collision experiments in a strong Coulomb field by using electron beam ion traps, systematically exploring the angular distribution and transition probabilities of atomic excited states which are related to the fusion plasma simulation and diagnostics. We will elucidate the detailed physical mechanism of the relativistic effect induced by the Breit interaction, and explore its impact on the precise diagnosis of plasma X-ray spectroscopy. The results will significantly advance the physics of atomic collisions in the strong Coulomb field. High-precision experimental results of radiative properties of dielectronic recombination satellite lines are expected to achieve the test of QED effect in the field of atomic collisions, and it will provide accurate atomic parameters for hot plasma precision diagnostics and radiation properties simulations in the fields of inertial confinement fusion and astrophysics.