Dynamics of small particles in electromagnetic radiation fields : A numerical solution

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http://hdl.handle.net/10138/225734

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Herranen , J , Markkanen , J & Muinonen , K 2017 , ' Dynamics of small particles in electromagnetic radiation fields : A numerical solution ' , Radio Science , vol. 52 , no. 8 , pp. 1016-1029 . https://doi.org/10.1002/2017RS006333

Title: Dynamics of small particles in electromagnetic radiation fields : A numerical solution
Author: Herranen, J.; Markkanen, J.; Muinonen, K.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2017-08
Language: eng
Number of pages: 14
Belongs to series: Radio Science
ISSN: 0048-6604
URI: http://hdl.handle.net/10138/225734
Abstract: We establish a theoretical framework for solving the equations of motion for an arbitrarily shaped, inhomogeneous dust particle in the presence of radiation pressure. The repeated scattering problem involved is solved using a state-of-the-art volume integral equation-based T-matrix method. A Fortran implementation of the framework is used to solve the explicit time evolution of a homogeneous irregular sample geometry. The results are shown to be consistent with rigid body dynamics, between integrators, and comparable with predictions from an alignment efficiency potential map. Also, we demonstrate the explicit effect of single-particle dynamics to observed polarization using the obtained orientational results.
Subject: scattering dynamics
interstellar dust
T-matrix method
optical force
optical torque
BEAM-SHAPE COEFFICIENTS
LORENZ-MIE THEORY
LOCALIZED APPROXIMATION
NONSPHERICAL PARTICLES
RIGOROUS JUSTIFICATION
AXIS BEAMS
T-MATRIX
SCATTERING
ALIGNMENT
TORQUES
115 Astronomy, Space science
114 Physical sciences
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