Title :
Measurement of the complex dielectric constant of volcanic ash at millimetre wavelengths
Author :
Rogers, Alexander B. ; Macfarlane, David G. ; Robertson, Duncan A.
Author_Institution :
Sch. of Phys. & Astron., Univ. of St Andrews, St. Andrews, UK
Abstract :
Methods for determining the dielectric permittivity of rock samples at millimetre wave frequencies have been investigated. A quasi-optical approach using pellets of powdered samples was found to work well, avoiding the dimensional restrictions of small waveguides. The permittivity of volcanic rock and ash samples was measured, providing valuable data for MMW radar remote sensing of terrain and ash clouds.
Keywords :
ash; geophysical techniques; permittivity; remote sensing by radar; rocks; MMW radar remote sensing; ash clouds; ash sample; complex dielectric constant; dielectric permittivity; millimetre wave frequencies; volcanic ash; volcanic rock sample; Ash; Clouds; Frequency measurement; Permittivity; Permittivity measurement; Wavelength measurement;
Conference_Titel :
Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-6655-9
DOI :
10.1109/ICIMW.2010.5612851
