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
Specific detection of the aerosol absorption coefficient on airborne particles in a single photoacoustic cell at multiple wavelengths
Customisable wavelength combinations in the 375 nm to 785 nm spectral range (e.g. 405 nm, 515 nm, 660 nm, 785 nm)
Compact stainless steel cylindrical cavity with a fundamental acoustic frequency of 3180 Hz
236 cm (including acoustic buffer volumes)
< 5∙10 1/m @ 60s aver. time (approx. 50 ng/m Black Carbon)
15% and 3%
0.5 - 2 lpm
1s sampling rate. 60s typical averaging time per wavelength.
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.