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Mobile Ice Nucleus Counter

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-10ER86438
Agency Tracking Number: 95287
Amount: $749,567.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: 32 c
Solicitation Number: DE-FOA-0000161
Solicitation Year: 2010
Award Year: 2011
Award Start Date (Proposal Award Date): 2011-08-15
Award End Date (Contract End Date): 2013-08-14
Small Business Information
2545 Central Avenue
Boulder, CO 80301-2865
United States
DUNS: 786731802
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Gregory Kok
 (303) 440-5576
Business Contact
 Gregory Kok
Title: Dr.
Phone: (303) 440-5576
Research Institution
 Pacific Northwest National Laboratory
902 Battele Blvd
Richland, WA 99352-
United States

 () -
 Federally Funded R&D Center (FFRDC)

Ice crystals can form spontaneously from the freezing of water droplets at temperatures colder than -38C - homogeneous nucleation - or from multiple processes termed heterogeneous nucleation that occur on refractory/insoluble substances at warmer temperatures. Heterogeneous nucleation occurs at temperatures warmer than the homogeneous threshold and includes the direct deposition of water vapor on the surfaces of aerosols (deposition nucleation), freezing of deliquesced aerosols (immersion nucleation) and freezing of water droplets that come in contact with an aerosol particle (contact nucleation). As a whole, the particles which induce freezing are known as ice nuclei (IN). Each of these nucleation processes can occur over a range of temperatures and relative humidities and depend on the chemical composition as well as the morphology of the particle. This complexity in processes leading to ice formation presents perhaps the greatest challenge to the atmospheric science community today. Commercial Applications and Other Benefits: In this proposal, the work will focus on the adaptation and development of the parallel plate IN counter into a commercial instrument. The first phase of this work will involve improvements in the refrigeration system and the adaptation of an optical particle spectrometer with depolarization to separately determine water and ice particles.

* Information listed above is at the time of submission. *

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