Per-Erik Bengtsson

Professor, Degree of Doctor, Degree of Master of Arts/Science in Upper Secondary Education, Degree of Master of Science in Engineering

Research areas and keywords

UKÄ subject classification

  • Atom and Molecular Physics and Optics
  • Meteorology and Atmospheric Sciences
  • Energy Engineering



I work with development of optical methods for applications in combustion processes and environment. Most often these methods are laser-based since lasers have the potential to measure with high time resolution as well as high spatial resolution. The methods, which are often based on physical principles, are developed to measure with high accuracy in order to be able to get fundamental knowledge about the studied processes. Often the measurements deal with temperatures, species and particle concentrations, and velocities.

I have especially directed my work towards measurements of temperatures and soot particles. When it comes to temperatures, I mostly work with development of a method named Coherent anti-Stokes Raman spectroscopy (CARS), which is often claimed to be the most accurate method for non-intrusive gas-phase thermometry. The method can also be used for concentration measurements of for example carbon monoxide, hydrogen, and carbon dioxide. The method has been applied to turbulent flames as well as to diesel engines and entrained flow gasifiers.

Regarding soot particle measurements, I work with development of soot concentrations as well as soot particle sizes. Recently, I have also focussed on measurements of the optical properties of soot as this is important in order to understand the radiation balance in the atmosphere. Soot particles are unwanted emissions from combustion as they are sign of inefficient combustion a well as they have negative impact on health and climate. The optical measurement methods for soot are applied to combustion and gasification processes, such as diesel engines and entrained flow gasifiers, and to the ambient air.

Recent research outputs

Nordström, E., A. Hosseinnia, C. Brackmann, J. Bood & P. E. Bengtsson 2016 Jul 18 Computational Optical Sensing and Imaging, COSI 2016. OSA - The Optical Society, Vol. Part F2-3D 2016, JT3A.24

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

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