Numerical and experimental Investigation of the electromagnetic coupling in hybrid DC-RF Plasma Sources

根据头24个月的活动，与原计划的时间和预算有限的活动相比，由于项目第一阶段的时间和材料限制，必须根据迄今为止的结果和所需的愿望清单对进一步的方面进行评估。主要活动必须包括数字代码SINA的扩展和改进（见扩展文件）和开放活动（如马赫-曾德尔干涉仪测量）的实验结果的必要概要，这些活动是研究项目成本中性扩展的部分内容。MZI的系统设计已经部分地被Chadwick的期刊论文（电子密度）中的结果所验证。与Nawaz和Herdrich使用空气获得的结果相比，使用氩气作为TIHTUS第二级推进剂的研究结果具有相互作用。然而，第一个解释性的方法表明，放电行为的第二阶段的TIHTUS必须进一步评估。此外，所获得的大部分结果以及Nawaz和Herdrich的结果可以使用SINA成功地验证。这使人们对计划中的项目第二阶段抱有很好的期望。显然，在第二阶段的最后6个月期间，必须对TIHTUS系统的整体特性进行表征，包括整体性能以及推力器相关参数（如推力和比冲）的确定。该评估必须以延迟的方式进行，因为TIHTUS感应加热阶段的第一个结果明显更具可持续性。关于推力和比冲确定的准备性研究已经开始并正在进行中，以便在以下项目阶段和成本中性扩展中以最小化的风险制定这些方面，该扩展已经进行了6个月。因此，研究项目的扩展将使迄今为止的结果得到显着改善，此外，还将显着扩展结果和知识，包括TIHTUS的优化潜力。

Based on the activities during the first 24 months, which was as compared with the originally planned activity limited in time and budget, furher aspects have to be assessed which base on both the results so far and a required wish list which is due to the temporal and budgeterial limitation of the first phase of the project.Major activities have to cover extensions and improvements of the numerical code SINA (see the extended document) and the needed synopsis of the experimental results with open activities such as the Mach-Zender-Interferometer measurements which are partly content of the cost neutral extension of the research project. The system design of the MZI has partly been verified by the results in Chadwick's journal paper (electron densities).Results from investigations with Argon as propellant for the second stage of TIHTUS have a reciprocal behaviour as compared with results obtained by Nawaz and Herdrich using air. However, very first explanatory approaches show that the discharge behaviour of the second stage of TIHTUS has to be assessed further. In additon, the majority of the results obtained and the results from Nawaz and Herdrich could be successfully verified using SINA. This allows for promising expectations in the planned second phase of the project. Evidently, the TIHTUS system at the whole has to be characterized during the last 6 months of the second phase concerning both the overall behaviour but also the determination of thruster relevant parameters such as thrust and specific impulse. This assessment has to be performed in a delayed manner as the first results for the inductively heated stage of TIHTUS were significantly more sustainable. Prepraratory studies with respect to thrust and specific impulse determination are already enagaged and ongoing such that these aspects can be worked out with a minimized risk in the follwing project phase and the cost neutral extension that has been engaged just now for the following 6 months. The extension of the research project, therefore, would enable both a significantly improved synthesis of the results so far and, in addition, a significant extension of both results and knowledge including the optimization potential for TIHTUS.