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A wide range (0.32°-177.6°), multi-angle light scattering setup and concomitant analysis method.

Prakash Gautam1, Christopher M Sorensen1

  • 1Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA.

The Review of Scientific Instruments
|December 2, 2021
PubMed
Summary

This study introduces a new laboratory light scattering apparatus for aerosols, enabling comprehensive analysis across a wide angular range. The novel optical design and data plotting methods provide detailed insights into aerosol scattering properties.

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Area of Science:

  • Aerosol science
  • Optical physics
  • Light scattering

Background:

  • Accurate characterization of aerosol optical properties is crucial for atmospheric studies and climate modeling.
  • Existing light scattering techniques often have limitations in covering the full angular range required for comprehensive analysis.

Purpose of the Study:

  • To develop and describe a novel laboratory light scattering apparatus for aerosols.
  • To cover an extended range of scattering angles, from extreme forward to backscattering.
  • To implement effective data analysis and visualization methods for comprehensive scattering characterization.

Main Methods:

  • A novel optical scheme was employed to achieve a wide scattering angle range (0.32° to 177.6°).
  • Two multichannel detectors were utilized for near-simultaneous data acquisition at 46 different angles.
  • Specific data analysis techniques involving logarithmic and linear plotting were developed for small and large angles, respectively.

Main Results:

  • The apparatus successfully covers an unprecedentedly wide angular range for aerosol light scattering measurements.
  • Inter-detector calibration methods were established for accurate data integration.
  • Combined logarithmic and linear plotting strategies provide a comprehensive view of scattering phenomena.

Conclusions:

  • The developed light scattering apparatus offers a powerful tool for detailed aerosol characterization.
  • The novel optical design and data processing methods enhance the understanding of aerosol scattering behavior across all angles.
  • This comprehensive approach is vital for advancing aerosol research and its applications.