Objective "This proposed research program aims to develop a versatile chemical sensing system based on a novel coherent supercontinuum (SC) laser source and absorption spectroscopy. Compared with the traditional SC sources, this new version takes advantage of all normal dispersion photonic crystal fibres (PCF) for the first time to suppress spectral noise and intensity fluctuations. As a result, averaging of absorption spectra can be minimized and temporal resolution can be greatly enhanced. The system is designed to possess two operational modes, which are the line-of-sight-averaged and tomographic modes respectively to satisfy various application needs. The line-of-sight-averaged mode is more suitable for situations where the temporal resolution is the first priority, for example, a rapid changing turbulent flame with insignificant non-uniformities in combustion field. On the contrary, the tomographic mode is targeted to maximize the spatial resolution and is a better option for scenarios where non-uniformities cannot be neglected such as steady laminar flames with large gradients in temperature and chemical species distributions. The implemented system will be verified on a flat burner which has been calibrated and well understood. The sensing system will be finally applied to a rapid compression machine (RCM) to simultaneously retrieve the temperature and concentrations of multiple species with ultrahigh repetition rate (on order of MHz). The purpose of this application is to obtain detailed insights during the ignition and combustion processes of homogeneous mixtures. Species of interest include e.g. acetylene C2H2 as a precursor of soot formation, H2O for temperature measurement, CO as an indicator of heat release, and the formyl radical CHO as an indicator for start of ignition and low-temperature combustion regime. Simultaneously measurement of temperature and concentrations of multiple species with ultrahigh temporal resolution is the major novelty of this project." Fields of science natural sciencesphysical sciencesopticsspectroscopyabsorption spectroscopynatural scienceschemical sciencesorganic chemistryaliphatic compoundsnatural sciencesphysical sciencesopticslaser physics Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Topic(s) FP7-PEOPLE-2012-IIF - Marie Curie Action: "International Incoming Fellowships" Call for proposal FP7-PEOPLE-2012-IIF See other projects for this call Funding Scheme MC-IIF - International Incoming Fellowships (IIF) Coordinator THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE EU contribution € 166 204,80 Address TRINITY LANE THE OLD SCHOOLS CB2 1TN Cambridge United Kingdom See on map Region East of England East Anglia Cambridgeshire CC Activity type Higher or Secondary Education Establishments Administrative Contact Renata Schaeffer (Ms.) Links Contact the organisation Opens in new window Website Opens in new window Total cost No data
