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

SGER：开发原位核磁共振波谱和原位 MRI 作为大气压等离子体的新诊断工具

• 批准号: 0747253
• 负责人: Thomas Meersmann
• 金额: --
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0747253&HistoricalAwards=false
• 关键词: SGER; Development; situ; NMR; spectroscopy

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.

提案编号：CBET-0747253主要研究者：Meersmann，托马斯 所属单位： 科罗拉多州立大学提案标题：SGER：原位NMR光谱学和原位MRI作为大气压等离子体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照明到处理和切割或材料的过程。 这项研究由探索性研究小额资助（SGER）项目资助，旨在探索开发用于等离子体研究的新型磁共振分析仪器，并建立其原理证明。目标是使用PI先前在其他系统中使用的超极化同位素129和83 Kr，以提供关于原位气体传输的空间分辨信息，例如流场参数、扩散数据和等离子体的各个区域之间的氙交换。此外，129 π弛豫可能会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。83 Kr技术对顺磁自由基的存在应该不太敏感，因此可以应用于自由基浓度对129 NMR来说太高的条件下。 它还可以用来比较两种惰性气体同位素之间的弛豫数据，以研究自由基存在所引起的效应。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使用NMR来研究磁流体动力学和化学物种的速度，浓度和温度，同时用洛伦兹力和/或施加的电场驱动离子，这对于大气放电几乎一无所知。