Calibration of a Rocket-borne Probe for Aerosol Particles in the Polar Mesosphere

Details Calibration of a Rocket-borne Probe for Aerosol Particles in the Polar Mesosphere Calibration of a Rocket-borne Probe for Aerosol Particles in the Polar Mesosphere

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa21a0242k&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA21A-0242

Physics

0305 Aerosols And Particles (0345, 4801, 4906), 2403 Active Experiments, 2461 Plasma Interactions With Dust And Aerosols (7849), 3332 Mesospheric Dynamics, 3394 Instruments And Techniques

Scientific paper

An instrument has been developed to detect charged, sub-visible aerosol particles in the polar mesosphere. This instrument has a 30 square centimeter entrance slit that admits a continuous flow of air. Venting ports are placed lower on the detector in order to let the air out and reduce pressure buildup. The air sample flows between four pairs of graphite electrodes biased symmetrically with increasing bias potentials. Electrons, light ions, cluster ions and heavy charged aerosol particles of both polarities are collected mass-selectively on the electrodes that are connected to sensitive electrometers. Direct Simulation Monte Carlo (DSMC) codes have been used to optimize the supersonic airflow within and around the instrument. A laboratory prototype of the instrument has been fabricated and calibrated using low energy ion beams. The calibration shows that the mass ranges that are collected by the plates are approximately those from the simulations. Two of these instruments are scheduled for launch in the summer of 2007 from Andoya, Norway. These in-situ measurements are planned to coincide with measurements by the Aeronomy of Ice in the Mesosphere (AIM) satellite. Acknowledgement: The project is supported by NASA.

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