Consulting
Consulting
schnaiTEC can share their experience and know-how in the following fields:
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Development of scientific instrumentation that is based on optical methods
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Instrumentation for laboratory research, e.g. cloud chamber instrumentation
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Instrumentation for field research, e.g. airborne instruments
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Particle light scattering simulations
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Expected signal of optical particle instruments, e.g. light scattering spectrometers
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Mie calculations for spherical particles
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Multiple-sphere clusters, e.g. absorption and light scattering by fractal soot particles
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T-matrix calculations for spheroidal particles
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Geometric optics for ice crystals
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Image analysis
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Processing of particle micrographs, e.g. from bright-field optical microscopy
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Extraction of microphysical properties from particle images
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Contact us for more information!
schnaiTEC can share their experience and know-how in the following fields:
-
Development of scientific instrumentation that is based on optical methods
-
Instrumentation for laboratory research, e.g. cloud chamber instrumentation
-
Instrumentation for field research, e.g. airborne instruments
-
-
Particle light scattering simulations
-
Expected signal of optical particle instruments, e.g. light scattering spectrometers
-
Mie calculations for spherical particles
-
Multiple-sphere clusters, e.g. absorption and light scattering by fractal soot particles
-
T-matrix calculations for spheroidal particles
-
Geometric optics for ice crystals
-
-
Image analysis
-
Processing of particle micrographs, e.g. from bright-field optical microscopy
-
Extraction of microphysical properties from particle images
-
Contact us for more information!
Do completely new research
Do completely new research
Hear your absorption
A direct way of measuring the aerosol absorption coefficient using the photo acoustic effect. Measurements at up to four wavelengths enable a specific characterisation of the aerosol.
Specifications
Concept
Wavelengths
Acoustic resonator
Cell volume
Detection limit
Accuracy & Precision
Aerosol flow
Time resolution (typ.)
Specific detection of the aerosol absorption coefficient on airborne particles in a single photoacoustic cell at multiple wavelengths
405 nm, 473 nm, 515 nm, 660 nm (other wavelengths possible on request)
Compact stainless steel cylindrical cavity with a fundamental acoustic frequency of 3200 Hz
236 cm (including acoustic buffer volumes)
< 5∙10 1/m @ 60s aver. time (approx. 50 ng/m Black Carbon)
5% and 3%
0.5 - 2 lpm
1 s
3
-7
3
References
Linke, C., Ibrahim, I., Schleicher, N., Hitzenberger, R., Andreae, M. O., Leisner, T., and Schnaiter, M., "A novel single-cavity three-wavelength photoacoustic spectrometer for atmospheric aerosol research", Atmospheric Measurement Techniques, 9, 5331-3346, 2016, doi:105194/amt-9-5331-2016.
Schnaiter, M., Linke, C., Ibrahim, I., Kiselev, A., Waitz, F., Leisner, T., Norra, S., and Rehm, T., "Specifying the light-absorbing properties of aerosol particles in fresh snow samples, collected at the Environmental Research Station Schneefernerhaus (UFS), Zugspitze.", Atmospheric Chemistry and Physics, 19, 10829-10844, 2019, doi:10.5194/acp-19-10829-2019.