Detachment, an important mechanism for reducing target heat deposition, is achieved through reductions in power, particle and momentum; which are induced through plasma–atom and plasma–molecule interactions. Experimental research in how those reactions precisely contribute to detachment is limited. Both plasma–atom as well as plasma–molecule interactions can result in excited hydrogen atoms which emit atomic line emission. In this work, we investigate a new Balmer Spectroscopy technique for Plasma–Molecule Interaction—BaSPMI. This first disentangles the Balmer line emission from the various plasma–atom and plasma–molecule interactions and secondly quantifies their contributions to particle (ionisation and recombination) and power balance (radiative power losses). Its performance is verified using synthetic diagnostic techniques of both attached and detached TCV and MAST-U SOLPS-ITER simulations. We find that H ₂ plasma chemistry involving and/or H ⁻ can substantially elevate the Hα emission during detachment, which we show is an important precursor for Molecular Activated Recombination. An example illustration analysis of the full BaSPMI technique shows that the hydrogenic line series, even Lyα as well as the medium-n Balmer lines, can be significantly influenced by plasma–molecule interactions by tens ofpercent. That has important implications for using atomic hydrogen spectroscopy for diagnosing divertor plasmas.

分离是减少目标热量沉积的重要机制，它是通过降低功率，颗粒和动量来实现的。它们是通过血浆-原子和血浆-分子的相互作用诱导的。这些反应如何精确促进脱离的实验研究是有限的。等离子体与原子之间以及等离子体与分子之间的相互作用都可能导致激发出的氢原子发出原子线发射。在这项工作中，我们研究了用于等离子体-分子相互作用的新型Balmer光谱技术-BaSPMI。这首先解开了来自各种等离子体-原子和等离子体-分子相互作用的巴尔默线发射，然后量化了它们对粒子（电离和复合）和功率平衡（辐射功率损耗）的贡献。使用附加和分离的TCV和MAST-U SOLPS-ITER模拟的综合诊断技术，可以验证其性能。我们发现ħ ₂涉及等离子体化学和/或ħ ^-可以基本上提升Hα分离期间发射，这我们显示为分子活化重组的重要前体。完整的BaSPMI技术的示例说明分析显示，氢离子系列，甚至Lyα以及中等n的Balmer谱系，都可能受到血浆分子相互作用的百分之几十的显着影响。这对于使用原子氢光谱法诊断偏滤器等离子体具有重要意义。