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Multi-species, real time, high sensitivity, and compact in-situ sensor for environmental monitoring

用于环境监测的多品种、实时、高灵敏度、紧凑型原位传感器

基本信息

批准号：
NE/H002014/1
负责人：
Damien Weidmann
金额：
$ 22.71万
依托单位：
Science and Technology Facilities Council
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2010
资助国家：
英国
起止时间：
2010 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FH002014%2F1
关键词：
Multi species real time sensitivity

项目摘要

The ability to carry out real-time (>1 kHz data rate), in-situ, trace concentration measurements (ppb - ppt) of molecules and radicals would be an enabler for a wide range of scientific activities, environmental sciences being a major beneficiary. Currently gas chromatography, mass spectrometry (GC/MS) or electrochemical sensors cannot offer these combined attributes. Real-time air-quality measurements, lower troposphere urban chemistry studies (pollutant pathways), anthropogenic and biogenic emission measurements, flux exchange monitoring, to name only a few, are areas that would benefit greatly from the development of ultra-high sensitivity sensors, suitable for field deployment and operating with high temporal resolution. In this application we propose to demonstrate a novel approach to address these aspirations, which is ground-breaking in the field of ultra-high sensitivity laser based sensors for in-situ monitoring and laboratory studies. The concept exploits aspects of tuneable laser absorption spectroscopy (LAS) with several combined advantages: mid infrared operation targeting intense fundamental ro-vibrational absorption bands, cavity type spectroscopy providing extremely long equivalent absorber path lengths, wide frequency tuneability for multispecies and/or broadband absorber monitoring and compactness and robustness for field deployment. We propose here to develop and demonstrate this novel concept for ultra-trace species monitoring and bring the technology from TRL1 to TRL3.

能够进行实时（bbb1khz数据速率），现场，分子和自由基的痕量浓度测量（ppb - ppt）将使各种科学活动成为可能，环境科学是一个主要受益者。目前，气相色谱、质谱（GC/MS）或电化学传感器无法提供这些组合属性。实时空气质量测量、对流层下层城市化学研究（污染物途径）、人为和生物排放测量、通量交换监测等领域都将从超高灵敏度传感器的发展中受益匪浅，这些传感器适用于实地部署并以高时间分辨率运行。在本应用程序中，我们建议展示一种新的方法来解决这些愿望，这是用于现场监测和实验室研究的超高灵敏度激光传感器领域的突破性进展。该概念利用了可调谐激光吸收光谱（LAS）的几个方面，具有几个综合优势：针对强烈的基本反振动吸收带的中红外操作，提供极长的等效吸收器路径长度的腔型光谱，多物种和/或宽带吸收器监测的宽频率可调性以及现场部署的紧凑性和鲁棒性。在此，我们建议开发和演示这种超痕量物种监测的新概念，并将该技术从TRL1引入TRL3。