MRI: Acquisition of a 750 Hz Narrow-Band Argon Fluoride Laser

MRI：采集 750 Hz 窄带氟化氩激光器

• 批准号: 0115912
• 负责人: Richard Stevens
• 金额: $ 11.53万
• 依托单位: Whitworth University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0115912&HistoricalAwards=false
• 关键词: MRI; Acquisition; 750; Hz; Narrow

With this award from the Major Research Instrumentation (MRI) Program, the Department of Chemistry at Whitworth College will acquire a 750 Hz narrow-band argon fluoride laser. This equipment will enhance research in the following areas: 1) development of a laser-induced fluorescence (LIF) system to analyze wear on carbon-based ion thruster grids in situ; and 2) measurement of the dissociative resonance Raman spectra of several interesting molecules that photodissociate at 193 nm. Researchers from several area institutions (Gonzaga University, Eastern Washington University, New Light Industries) would also use this laser system to carry out studies on nonlinear materials, photoacoustic spectroscopy of bacteria and to develop high-spatial frequency gratings for templates in the growth of controlled orientation colloidal photonic crystals. Undergraduate students at Whitworth, Gonzaga and Eastern Washington will be heavily involved in the research efforts. A high repetition rate laser provides pulses of coherent visible or infrared light and enables researchers to obtain important information about fast occurring chemical reactions. Its use may enable breakthroughs in our understanding of the properties of reactive and nonreactive molecules. In particular, LIF is capable of detecting very small quantities of carbon atoms in the plumes of ion thrusters. This will allow for a rapid diagnostic test for wear in these advanced thruster systems. A switch to carbon-based thrusters will significantly increase the efficiency and lifetime of the ion thrusters, resulting in tremendous cost-savings.

有了这项来自主要研究仪器（MRI）计划的奖项，惠特沃思学院化学系将获得750 Hz窄带氟化氩激光器。 这一设备将加强以下领域的研究：1）开发激光诱导荧光系统，以就地分析碳基离子推进器栅格的磨损情况; 2）测量在193 nm处发生光解离的几种重要分子的解离共振拉曼光谱。 来自几个地区机构（贡扎加大学、东华盛顿大学、新轻工业公司）的研究人员也将使用这一激光系统进行非线性材料、细菌光声光谱学的研究，并开发用于受控取向胶体光子晶体生长的模板的高空间频率光栅。 惠特沃思、贡扎加和东部华盛顿的本科生将大量参与研究工作。 高重复率激光器提供相干可见光或红外光脉冲，使研究人员能够获得有关快速发生的化学反应的重要信息。 它的使用可能使我们对反应性和非反应性分子性质的理解取得突破。 特别是，LIF能够检测离子推进器羽流中非常少量的碳原子。 这将允许对这些先进推进器系统的磨损进行快速诊断测试。 改用碳基推进器将显著提高离子推进器的效率和寿命，从而节省大量成本。