Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

tdma > Tandem Differential Mobility AnalyzerInstrument Type(s) > Baseline • Guest

The tandem differential mobility analyzer (TDMA) measures aerosol dry-size distribution and size-resolved hygroscopic growth.

In its standard operating mode, dry aerosols are separated into size bins by the first differential mobility analyzer and then exposed to 85% relative humidity. The resulting hygroscopic growth distributions are then scanned by the second differential mobility analyzer for each dry-size bin.


  • Fixed
  • AMF1
  • AMF2
  • AMF3


Kasparoglu S, T Wright, and M Petters. 2022. "Open-hardware design and characterization of an electrostatic aerosol precipitator." HardwareX, 11, e00266, 10.1016/j.ohx.2022.e00266.


Subba T, M Lawler, and A Steiner. 2021. "Estimation of possible primary biological particle emissions and rupture events at the Southern Great Plains ARM site." Journal of Geophysical Research: Atmospheres, 126(16), e2021JD034679, 10.1029/2021JD034679.


Lu C, Y Liu, S Yum, J Chen, L Zhu, S Gao, Y Yin, X Jia, and Y Wang. 2020. "Reconciling Contrasting Relationships between Relative Dispersion and Volume‐Mean Radius of Cloud Droplet Size Distributions." Journal of Geophysical Research: Atmospheres, 125(9), e2019JD031868, 10.1029/2019JD031868.


Mohr C, J Thornton, A Heitto, F Lopez-Hilfiker, A Lutz, I Riipinen, J Hong, N Donahue, M Hallquist, T Petäjä, M Kulmala, and T Yli-Juuti. 2019. "Molecular identification of organic vapors driving atmospheric nanoparticle growth." Nature Communications, 10(1), 4442, 10.1038/s41467-019-12473-2.
Research Highlight

Rothfuss N, S Petters, W Champion, A Grieshop, and M Petters. 2019. "Characterization of a dimer preparation method for nanoscale organic aerosol." Aerosol Science and Technology, 53(9), 10.1080/02786826.2019.1623379.

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