Absolute Time - And Space - Resolved Measurements Of High Field Ionization In Plasmas

等离子体高场电离的绝对时间和空间分辨测量

• 批准号: 1301948
• 负责人: Howard Milchberg
• 金额: $ 63万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1301948&HistoricalAwards=false
• 关键词: Absolute; Time; Space; Resolved; Measurements

Ionization of atoms and molecules is a ubiquitous process common to all instances of the interaction of intense laser pulses with matter. It is central to industrial and defense applications, including strong laser heating of droplets to produce radiation for next generation semiconductor lithography, studies of high energy density matter on the National Ignition Facility, and propagation of high power laser pulses through the atmosphere.Despite the importance of laser-driven ionization, the process has never before been measured with ultrafast time and micron space resolution in combination with absolute yield. This information is essential for both applications and for verification of underlying theoretical models. In this work, these measurements will be accomplished for the first time with a special laser-based strobe-like diagnostic capable of achieving these time and space resolutions.

原子和分子的电离是强激光脉冲与物质相互作用的普遍过程。它是工业和国防应用的核心，包括强激光加热液滴以产生下一代半导体光刻的辐射，国家点火装置上高能量密度物质的研究，以及高功率激光脉冲在大气中的传播。以前从未用超快时间和微米空间分辨率结合绝对产率来测量该工艺。这些信息对于应用和验证基本理论模型都是必不可少的。在这项工作中，这些测量将首次完成一个特殊的基于激光的频闪式诊断能够实现这些时间和空间分辨率。