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Title: The SPectrometer for Ice Nuclei (SPIN): An instrument to investigate ice nucleation

The SPectrometer for Ice Nuclei (SPIN) is a commercially available ice nucleating particle (INP) counter manufactured by Droplet Measurement Technologies in Boulder, CO. The SPIN is a continuous flow diffusion chamber with parallel plate geometry based on the Zurich Ice Nucleation Chamber and the Portable Ice Nucleation Chamber. This study presents a standard description for using the SPIN instrument and also highlights methods to analyze measurements in more advanced ways. It characterizes and describes the behavior of the SPIN chamber, reports data from laboratory measurements, and quantifies uncertainties associated with the measurements. Experiments with ammonium sulfate are used to investigate homogeneous freezing of deliquesced haze droplets and droplet breakthrough. Experiments with kaolinite, NX illite, and silver iodide are used to investigate heterogeneous ice nucleation. SPIN nucleation results are compared to those from the literature. A machine learning approach for analyzing depolarization data from the SPIN optical particle counter is also presented (as an advanced use). Altogether, we report that the SPIN is able to reproduce previous INP counter measurements.
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  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Leibniz Institute for Tropospheric Research, Leipzig (Germany)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Droplet Measurement Technologies, Boulder, CO (United States)
  5. Univ. of Manchester, Manchester (United Kingdom)
  6. British Antarctic Survey, Cambridge (United Kingdom)
  7. Univ. of Leeds, Leeds (United Kingdom)
  8. Univ. of Toronto, Toronto (Canada)
  9. V-ZUG AG, Zurich (Switzerland)
  10. Swiss Federal Institute of Technology, Zurich (Switzerland)
Publication Date:
Report Number(s):
Journal ID: ISSN 1867-8548; KP1704020
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Atmospheric Measurement Techniques (Online)
Additional Journal Information:
Journal Name: Atmospheric Measurement Techniques (Online); Journal Volume: 9; Journal Issue: 7; Journal ID: ISSN 1867-8548
European Geosciences Union
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier: