MRI: Acquisition of a Terahertz Time Domain Spectrometer

MRI：获取太赫兹时域光谱仪

• 批准号: 0821756
• 负责人: Lisa Zurk
• 金额: $ 25万
• 依托单位: Portland State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0821756&HistoricalAwards=false
• 关键词: MRI; Acquisition; Terahertz; Time; Domain

Objective:Terahertz (THz) sensing is emerging as a promising new technology with application to a wide number of compelling problems in material probing, medical imaging, and device design. THz imaging has several desirable attributes such as distinctive spectral signatures, sensitivity to sub-millimeter-scale features, safe operation for personnel screening, and the ability to penetrate through materials. However, researchers are only beginning to develop a rigorous understanding of the complicated THz signatures which are influenced by both chemical composition and scattering from a material's microstructure. The objective of this proposal is to support a concerted THz measurement effort with the acquisition of a THz time domain spectroscopy system.Intellectual Merit:A core contribution will be the development of electromagnetic scattering models appropriate for characterizing THz wave interaction with complex random media (for example, manmade or natural materials with randomly dispersed features such as cracks, grains, or interfaces). The need to understand this interaction arises in almost all potential applications of THz sensing and can only be rigorously addressed with an integrated measurement effort.Broader Impact:The THz system will support a host of research and educational activities by researchers at Portland State, neighboring academia, and industry partners, resulting in increased collaboration and strengthening the participation of women (both PI and Co-PI are female role models). Students will have the opportunity to engage in cutting edge THz research and associated multi-institutional activities. The potential societal benefits are truly impressive, including the potential for a new medical imaging capability or the ability to detect concealed explosives.

目的：太赫兹（THz）传感是一种新兴的有前途的新技术，在材料探测、医学成像和器件设计等领域有着广泛的应用。太赫兹成像具有几个理想的属性，例如独特的光谱特征，对亚毫米尺度特征的灵敏度，人员筛选的安全操作以及穿透材料的能力。然而，研究人员才刚刚开始对复杂的THz特征进行严格的理解，这些特征受到材料微观结构的化学成分和散射的影响。该提案的目的是支持一个协调的太赫兹测量工作与收购的太赫兹时域spectroscopy system.Intellectual优点：一个核心的贡献将是电磁散射模型的发展，适合表征太赫兹波与复杂的随机介质（例如，人造或天然材料与随机分散的功能，如裂缝，晶粒，或接口）的相互作用。太赫兹系统将支持波特兰州立大学的研究人员、邻近的学术界和工业界合作伙伴开展的一系列研究和教育活动，从而增加合作并加强妇女的参与（PI和Co-PI都是女性榜样）。学生将有机会参与尖端的THz研究和相关的多机构活动。潜在的社会效益确实令人印象深刻，包括新的医学成像能力或探测隐藏爆炸物的能力的潜力。