EAGER: Thermospheric High Power Rayleigh Lidar

EAGER：热层高功率瑞利激光雷达

基本信息

批准号：
1029044
负责人：
Gary Swenson
金额：
$ 25.09万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-04-01 至 2014-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1029044&HistoricalAwards=false
关键词：
EAGER Thermospheric Power Rayleigh Lidar

项目摘要

The investigators will develop a Rayleigh lidar instrument incorporating a new, high-power, diode-pumped YAG laser. The traditional Rayleigh lidars, which use 8-10 Watt pulsed lasers and 1-meter class telescopes, reach altitudes of 70 km with relatively short integration times. Above 80 km, one-hour integration times are required. In recent years, pulsed YAG lasers have been developed for commercial purposes with 100-1000 W average powers and 8 kHz pulse repetition frequencies. The high power lidar to be developed will be able to make measurements up to 125 km altitude with integration times of one hour or less. The engineering involves splitting 8 kHz (high frequency) laser pulses into eight 1 kHz slightly separated beams for time gated returns to 150 km. The multiple beams are imaged to a high-quantum-efficiency, EMCCD imager, where row clocking is employed for time range information. The entire system incorporates new but existing technology, for low cost, highly reliable operations, ideal for remote facility instrumentation. The instrument developers will test the instrument by operating it for two nights at the Magdalena Ridge Observatory in New Mexico, which has a 2.4 m diameter mirror. Studies have shown extreme variability in the dynamics of the neutral atmosphere between 100 and 140 km altitude. Undergraduate and graduate students will be involved with the development to help train the next generation of engineers and scientists involved in upper atmospheric studies.

调查人员将开发一种雷利激光雷德乐器，其中包括一种新的高功率，二极管泵式激光器。传统的雷利激光雷达（Rayleigh LiDars）使用8-10瓦脉冲激光器和1米级望远镜，达到70公里的高度，整合时间相对较短。需要超过80公里，需要一个小时的整合时间。近年来，为商业目的而开发了脉冲YAG激光器，平均功率为100-1000 w和8 kHz脉冲重复频率。要开发的高功率激光雷达将能够进行高度至125公里的测量，集成时间为一小时或更短。该工程涉及将8 kHz（高频）激光脉冲分成8个1 kHz，以稍微分开的光束，以返回150 km。将多个光束成像为高量化效率EMCCD成像仪，在该图像中，使用了行时钟以获取时间范围信息。整个系统都结合了新的但现有的技术，以低成本，高度可靠的操作，非常适合远程设施工具。仪器开发人员将通过在新墨西哥州的Magdalena Ridge天文台操作两晚来测试该仪器，该仪器的直径为2.4 m。研究表明，在100至140 km海拔之间的中性气氛的动力学中极大的变化。本科生和研究生将参与发展，以帮助培训参与大气层研究的下一代工程师和科学家。