Astrophysics and plasma relevant experimental studies of hydrogen and helium chemistry in high and low temperature ion traps and guides

中性和电离的氢原子和分子在自然环境中发挥着关键作用，如早期宇宙，星际或星际介质以及许多技术过程，其中最复杂的是受控聚变。为了模拟不同条件下含氢物质的形成和破坏，需要有关基本过程的基本信息，特别是在广泛的温度和密度范围内。这项提议的目标是继续和深化我们在德国和塞尔维亚的集团之间的合作。利用Köln上提供的低温离子阱，已经获得了一些有趣的结果，包括质子从内部热的H3+转移到碰撞能量为几K的He和He-H3+的复杂红外光谱，这是一个至关重要的系统。由于H3+不仅对天体化学很重要，而且对氢等离子体也很重要，因此我们的低温活动必须与eV范围内的实验相补充。为此，伊戈尔·萨维奇教授的经验和他在塞尔维亚诺维萨德大学的小组的贡献将是必不可少的。该提案的实验部分包括利用Köln的资源和可用性完成一个引导离子束仪器，并在2017年春季将其转移到塞尔维亚。本提案的核心科学目标是研究H3+ + He碰撞作为内部和平动能量的函数。未来的实验还将包括碰撞能量或温度下的其他离子（例如碳氢化合物），这与聚变反应堆和恒星外流有关。我们的低温活动将在DFG核心设施“科隆太赫兹光谱学中心”的框架内继续进行。

Neutral and ionized hydrogen atoms and molecules play a key role in natural environ-ments such as the early universe, inter- or circumstellar media and in many technological processes, the most complicated one being controlled fusion. In order to model the formation and destruction of hydrogen containing species under different conditions, fundamental information on the relevant elementary processes is needed, especially over a wide range of temperatures and densities. The goal of this proposal is to continue and deepen the cooperation between our groups in Germany and Serbia. Using the cryogenic ion traps available in Köln, interesting results already have been obtained including proton transfer from internally hot H3+ to He at collision energies of a few K and complex infrared spectra of He-H3+, a system of fundamental importance. Because H3+ is not only important for astrochemistry but also for hydrogen plasmas, our low temperature activities must be complemented with ex-periments in the eV range. For this the experiences of Prof. Igor Savic and the contribu-tions of his group at the University of Novi Sad in Serbia will be essential. The experi-mental part of this proposal consists of the completion of a guided ion beam instrument using the resources and know how available in Köln and to transfer it to Serbia in spring 2017. In the center of the scientific aims of this proposal are studies of H3+ + He collisions as a function of the internal and translational energy. Future experiments will also include other ions (e.g. hydrocarbons) at collision energies or temperatures, relevant for fusion reactors and stellar outflows. Our low temperature activities will be continued in the frame of the DFG core facility 'Cologne Center for Terahertz Spectroscopy'.