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

根据头24个月期间的活动，与时间和预算有限的原计划活动进行比较，必须根据迄今为止的结果和由于项目第一阶段的时间和预算限制所要求的愿望清单，对进一步的方面进行评估。主要活动必须涵盖数字代码SINA的扩展和改进（见扩展文档），以及开放活动（如马赫-曾德干涉仪测量）的实验结果的必要摘要，这些活动部分内容是研究项目成本中性扩展的内容。MZI的系统设计部分被查德威克的期刊论文（电子密度）的结果所证实。用氩气作为TIHTUS第二级推进剂的研究结果与Nawaz和Herdrich用空气得到的结果相比具有互反性。然而，最初的解释方法表明，TIHTUS第二阶段的排放行为必须进一步评估。此外，所获得的大部分结果以及Nawaz和Herdrich的结果都可以使用SINA成功验证。这允许在计划的项目第二阶段有希望的期望。显然，整个TIHTUS系统必须在第二阶段的最后6个月期间进行表征，这不仅涉及总体行为，还涉及推力和比冲等推进器相关参数的确定。该评估必须延迟进行，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研究已经开始并正在进行中，这样这些方面可以在接下来的项目阶段以最小的风险进行，并且在接下来的6个月里已经进行了成本中性的扩展。因此，研究项目的扩展将使迄今为止的结果的综合得到显著改善，此外，结果和知识的显著扩展，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.