Ultrasensitive, Fast-Response Size-Dependent Soot Spectrometer

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX10CC75P
Agency Tracking Number: 095093
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solicitation Year: 2009
Solicitation Topic Code: A2.02
Solicitation Number: N/A
Small Business Information
45 Manning Road, Billerica, MA, 01821-3976
DUNS: 030817290
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Andrew Freedman
 Principal Investigator
 (978) 663-9500
 af@aerodyne.com
Business Contact
 Charles Kolb
Title: President
Phone: (978) 663-9500
Email: kolb@aerodyne.com
Research Institution
N/A
Abstract
We propose to develop a "black carbon" (soot) monitor for measuring non-volatile particulate emissions from gas turbine engines employing a proprietary optical extinction measurement technique based on cavity attenuated phase shift spectroscopy (CAPS) operting in conjunction with a differential mobility analyzer. The singular aspect of the CAPS approach is that extinction is measured by determining shifts in the phase angle of a modulated light beam instead of changes in the intensity of the ransmitted light caused by the presence of particulates. This aspect makes the sensor immune to either abrupt or gradual changes in the intensity of the light caused by temperature or pressure fluctuations or light source deterioration. Furthermore, the sensor rarely needs to be calibrated – i.e., its span value, a function of the optical properties of the particles themselves, remains virtually constant. This sensor does not rely on the deposition of particles on a filter and requires little maintenance. The monitor will be able to measure the size dependent particle mass concentration in the sub-micrograms per cubic meter with a sampling period of only 1 second.

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

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