Applied Raman Scattering Lab (ARS)

The Applied Raman Scattering (ARS) laboratory has been headed by Andreas Braeuer since January 2006. From January 2006 since March 2007 it was named “Process Diagnostics” group and had been a research group at the institute of engineering thermodynamics at the department of chemical and bioengineering at the faculty of engineering at the Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU). Due to the orientation of the research group hosted at the institute of engineering thermodynamics, the “Process Diagnostics” group was renamed as “High Pressure Process Technology” group in 2013.

In April 2007 Andreas Braeuer became board member of the directors of the Erlangen Graduate School in Advanced Optical Technologies (SAOT), which was established in November 2006 within the German Excellence Initiative at FAU. At the same time and in addition to the “Process Diagnostics” group he built up the ARS laboratory as one of the SAOT research laboratories. Today the ARS laboratory and the “High Pressure Process Technology” group are split only formally but are nearly identical in fact.

The scope of the laboratory

The main scope of the Applied Raman Scattering laboratory is the understanding and development of advanced process technologies in chemical, biological and medical engineering. On this purpose mainly Raman-based laser diagnostics are developed and applied as measurement tools, which make possible the non-invasive and remote in situ analysis of the processes’ functioning chains. Non Raman-based optical measurement techniques are also covered by the laboratory’s expertise such as elastic light scattering techniques or absorption and emission techniques.

Often advanced process technologies go along with high pressure, high temperature, short residence times, turbulence, non-stationary operation conditions and limited optical access. Therefore the reliable and optimized operation of advanced processes must not purely rely on theoretical considerations which cannot account for all the above mentioned influences. Consequently the combination of in situ advanced diagnostics with advanced processes is the only possibility to analyze the interconnected intermediate steps which define the functioning chain of the respective processes. Time scales and inhomogeneities are accessible, if imaging measurement techniques with high temporal and spatial resolution are applied. Especially the simultaneous multi-parameter detection allows capturing the mutual interaction of different mechanisms, e.g. flow and mixing. The interpretation of the resulting insights permits targeted operation and optimization of the respective process technologies.