This display requires that JavaScripts be enabled in your browser. For instructions, view http://www.nasa.gov/home/How_to_enable_Javascript.html
Instrument: N-MASS : Nucleation-Mode Aerosol Size Spectrometer
View entire text

Related Data Sets
View all records related to this instrument


Description
N-MASS (Nucleation-Mode Aerosol Size Spectrometer) measures the
concentration of particles as a function of diameter from
approximately 4 to 60 nm. A sample flow is continuously
extracted from the free stream using a decelerating inlet and is
transported to the N-MASS. Within the instrument, the sample
flow is carried to 5 parallel condensation nucleus counters
(CNCs). Each CNC is tuned to measure the cumulative
concentration of particles larger than certain diameter. The
minimum detectable diameters for the 5 CNCs are 4.0, 7.5, 15, 30
and 55 nm, respectively. An inversion algorithm is applied to
recover a continuous size distribution in the 4 to 60 nm
diameter range.

Additional information available at
http://www.engr.du.edu/aerosol/nmass.htm