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Laboratory Measurements of Optical Properties of Micron Size Individual Dust GrainsA laboratory program is being developed at NASA Marshall Space Flight Center for experimental determination of the optical and physical properties individual dust grains in simulated astrophysical environments. The experimental setup is based on an electrodynamic balance that permits levitation of single 0.1 - 10 micron radii dust grains in a cavity evacuated to pressures of approx. 10(exp -6) torr. The experimental apparatus is equipped with observational ports for measurements in the UV, visible, and infrared spectral regions. A cryogenic facility for cooling the particles to temperature of approx. 10-50K is being installed. The current and the planned measurements include: dust charging processes, photoelectric emissions and yields with UV irradiation, radiation pressure measurements, infrared absorption and scattering properties, and condensation processes, involving the analogs of cosmic dust grains. Selected results based on photoemissions, radiation pressure, and other laboratory measurements will be presented.
Document ID
20030061149
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Abbas, M. M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Craven, P. D.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Spann, J. F.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Tankosic, D.
(Alabama Univ. Huntsville, AL, United States)
LeClair, A.
(Alabama Univ. Huntsville, AL, United States)
Witherow, W. K.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Camata, R.
(Alabama Univ. Birmingham, AL, United States)
Gerakines, P.
(Alabama Univ. Birmingham, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Space Sciences (General)
Meeting Information
Meeting: Comprehensive International Symposium on Cosmic Dust
Location: Estes Park, CO
Country: United States
Start Date: May 26, 2003
End Date: May 29, 2003
Distribution Limits
Public
Copyright
Other

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