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Experimental Determination of Infrared Extinction Coefficients of Interplanetary Dust ParticlesThis technique is based on irradiating a single isolated charged dust particle suspended in balance by an electric field, and measuring the scattered radiation as a function of angle. The observed scattered intensity profile at a specific wavelength obtained for a dust particle of known composition is compared with Mie theory calculations, and the variable parameters relating to the particle size and complex refractive index are adjusted for a best fit between the two profiles. This leads to a simultaneous determination of the particle radius, the complex refractive index, and the scattering and extinction coefficients. The results of these experiments can be utilized to examine the IRAS and DIRBE (Diffuse Infrared Background Experiment) infrared data sets in order to determine the dust particle physical characteristics and distributions by using infrared models and inversion techniques. This technique may also be employed for investigation of the rotational bursting phenomena whereby large size cosmic and interplanetary particles are believed to fragment into smaller dust particles.
Document ID
19990018631
Document Type
Reprint (Version printed in journal)
Authors
Spann, J. F., Jr.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Abbas, M. M.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 29, 1998
Subject Category
Astrophysics
Meeting Information
AGU Spring Meeting(Boston, MA)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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