Particle and Aerosol Research Vol. 1, No. 1, December 2005 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Real time aerosol speed and trajectory characteristics near the inlet in AMS (Aerosol Mass Spectrometery)
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Abstracts
We have designed an aerosol introduction system including nozzle, two skimmer, differential pumping system
and optical aerosol sizing system. Using this system, we have measured aerosol speed, divergence, introduction
and expected targeting efficiency. The mobile velocity of the aerosol which depends on size and density ranged
from 200 m/sec to 400 m/sec at the size 0.3~3 ¥ìm in this system . The trajectory of aerosol depends mostly on the
pressure of first chamber. The beam divergence vary from 5 mrad 30 mrad depending on the pressure and aerosol
size. The detection efficiency of aerosol at the second laser is above 40% for all particle at the main chamber.
These speed, divergence, and detection efficiency will be used in calibration of aerosol size and increasing the
ionization efficiency.
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