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Spectrometer for Ice Nuclei (SPIN)
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Overview
The DMT CCN counter has expanded the capability of researchers to understand aerosol-cloud interactions for warm clouds. Missing from the capability of researchers, however, has been the easy ability to study ice cloud nuclei. The SPIN fills this gap. The SPIN is the first commercially available IN counter, with a particle detection range from 0.3 – 10 µm. Particle detection allows
for individual particle sizing and discrimination of ice and water particles using polarization change in the scattered light. The SPIN’s chamber design is based on parallel-plate geometry. This design provides easy and uniform cooling. A compact refrigeration system cools the plates directly, eliminating the need for external cooling baths and heat exchange fluids.
The parallel plate chamber follows the design of Stetzer and engineering team at ETH-Zurich. Details are given in Chou et al, "Ice nuclei properties within a Saharan dust event at the Jungfraujoch in the Swiss Alps" (Atmos. Chem. Phys. 11, 4725-4738, 2011; pdf link). The construction of the SPIN chamber is similar to the Portable Ice Nucleation Chamber (PINC) referenced in this paper. The evaporation section incorporates some changes that differ from the PINC instrument as do the control electronics, software, refrigeration system, and depolarization detector, which are of DMT design and construction.
Preliminary Specifications:
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• Particle detection range of 0.3 – 10 µm
• Polarization-change discrimination of particle phase
• Parallel-plate chamber geometry
• Self-contained compact refrigeration system:
- Cold plate temperature to -70° C
- Warm plate temperature to -40° C
• Full computer control of all systems; automated operation for
unattended measurements
• Self-contained in a single rack, 59 cm wide x 73 cm deep x 167 cm high
• Power requirements: 220 VAC, 50/60 Hz, 3000 W or 28 VDC, 3000 W
• Aircraft ready—meets most aircraft standards
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Note: Specifications are preliminary and subject to change without notice.
Interior Drawing
How to Order:
Contact DMT for pricing: +1.303.440.5576,
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
. Please reference part number AAA-0132.
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