SGER: Development of in situ NMR spectroscopy and in situ MRI as new diagnostic tools for atmospheric pressure plasmas

提案编号：cbet0747253项目负责人：Meersmann， Thomas合作院校：科罗拉多州立大学提案标题：SGER：原位核磁共振光谱和原位核磁共振作为大气压等离子体的新诊断工具的发展电等离子体广泛用于从微芯片制造到荧光灯照明到处理和切割材料的过程。这项研究由探索性研究小额资助（SGER）项目资助，旨在探索用于等离子体研究的新型、基于磁共振的分析仪器的发展，并建立其原理证明。目标是使用超极化同位素129Xe和83Kr （PI以前在其他系统中使用过）来提供关于原位气体传输的空间分辨信息，如流场参数、扩散数据和等离子体不同区域之间氙的交换。此外，129Xe弛豫有可能让我们深入了解等离子体中自由基和气体相互作用的存在。83Kr技术应该对顺磁自由基的存在不那么敏感，因此可以应用于129Xe核磁共振的自由基浓度太高的条件下。它也可以用来比较两种稀有气体同位素之间的弛豫数据，以研究自由基的存在所引起的影响。如果成功，这项研究有望为等离子体分析提供有价值的新工具。一个特别令人兴奋的方面是利用核磁共振来观察磁流体动力学和化学形态的速度、浓度和温度，同时用洛伦兹力和/或应用电场驱动离子，关于大气放电几乎一无所知。

Proposal Number: CBET-0747253Principal Investigator: Meersmann, Thomas Affiliation: Colorado State UniversityProposal Title: SGER: Development of in situ NMR spectroscopy and in situ MRI as new diagnostic tools for atmospheric pressure plasmasElectrical plasmas are widely used for processes from microchip manufacturing to fluorescent lighting to treatment and cutting or materials. This research, sponsored through the Small Grant for Exploratory Research (SGER) program, seeks to explore the development of new, magnetic-resonance-based analytical instrumentation for plasma research and to establish the proof of principle for it. The goal is to use hyperpolarized isotopes 129Xe and 83Kr, used previously by the PI in other systems, to provide spatially resolved information about in situ gas transport such as flow field parameters, diffusion data, and exchange of xenon between various regions of the plasma. Furthermore, it is possible that 129Xe relaxation will allow insights into the presence of radicals and gas interactions within plasmas. The 83Kr technique should be much less sensitive to the presence of paramagnetic radicals and thus could be applied at conditions where the radical concentration is too high for 129Xe NMR. It could also be used to compare relaxation data between the two noble gas isotopes to study effects caused by the presence of radicals.If successful, the research is expected to yield valuable new tools for analysis of plasmas. A particularly exciting aspect is the potential to use NMR to look at magnetohydrodynamics and chemically speciated velocity, concentration, and temperature while driving ions with Lorenz forces and/or applied E-fields, about which almost nothing is known for atmospheric discharges.