LIISim Software
LIISim is a modular signal processing toolbox developed and maintained by our Chair at the University of Duisburg-Essen. This tool is designed to assist the scientific community with time-resolved laser-induced incandescence (LII) measurements, which are used for in situ analysis of gas-borne soot and inorganic nanoparticles in reactive media like flames or gas-phase synthesis.
LIISim enables precise determination of particle cooling curves and particle sizes by measuring the temporal decay of particle incandescence at multiple wavelengths after laser-induced heating.
The software facilitates the complex process of evaluating LII data, starting with importing raw signals from oscilloscopes, processing these signals to calibrated forms, applying spectroscopy and heat transfer models, and finally visualizing, comparing, and extracting the data.
The software’s modular architecture allows users to customize and extend its capabilities. It includes various spectroscopic and heat-transfer models, enabling accurate simulations of particle behavior during and after laser heating. This flexibility is crucial for adapting to different experimental setups and conditions.
A significant advantage of LIISim is its support for a common file format, which simplifies data exchange and comparison between research groups. This standardization can lead to the establishment of a public measurement database, enhancing collaborative efforts and inter-laboratory comparisons. By providing open-source access under the GNU General Public License (GPL), LIISim encourages validation, improvement, and further development by the global research community.
LIISim is equipped with a graphical user interface (GUI) that allows dynamic evaluation of data. Users can configure and combine processing steps flexibly, visualize the results in real-time, and analyze experimental data with ease. The software’s multi-threading capability ensures efficient processing, making it suitable for handling large datasets.
Fig1. Graphical User Interface (GUI)
The source code and executable files are available on GitHub, promoting transparency and accessibility.
In summary, LIISim is a comprehensive tool that enhances the accuracy and efficiency of with time-resolved LII measurements. Its open-source nature, combined with robust features for data processing and analysis, makes it an invaluable resource for researchers in the field of combustion and nanoparticle diagnostics.