Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981fugv.rept.....m&link_type=abstract
Final Report, 1 Aug. 1978 - 31 Oct. 1979 Florida Univ., Gainesville. Space Astronomy Lab.
Astronomy and Astrophysics
Astronomy
Cosmic Dust, Radiation Pressure, Rotating Matter, Solar Radiation, Spin Dynamics, Albedo, Experiment Design, High Speed Cameras, Particle Size Distribution, Polarization (Spin Alignment), Torque
Scientific paper
A crossed beam, horizontal optical trap, used to achieve laser levitation of particles in an effort to determine how solar radiation produces high spin rate in interplanetary dust particles, is described. It is suggested that random variations in albedo and geometry give rise to a nonzero effective torque when the influence of a unidrectional source of radiaton (due to the Sun) over the surface of a interplanetary dust particle is averaged. This resultant nonzero torque is characterized by an asymmetry factor which is the ratio of the effective moment arm to the maximum linear dimension of the body and is estimated to be 5 X 10 to the minus four power. It is hoped that this symmetry factor, which stabilizes the nonstatistical response of the particle, can be measured in a future Spacelab experiment.
Misconi Nebil Y.
Ratcliff K. F.
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