Charge estimation of particles based on the electromagnetic scattering signals
Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education of China Lanzhou, Gansu 730000, China and College of Civil Engineering and Mechanics, Lanzhou University - Lanzhou, Gansu 730000, China
Received: 11 July 2016
Accepted: 19 September 2016
According to the electromagnetic (EM) wave scattering field of charged spherical particles, we derived the amplitude ratio and phase difference of the transverse components of the scattered electric field. We found that in the direction perpendicular to the incident direction of the EM waves, the amplitude ratio and phase difference are linearly dependent on the surface potential. For particulate systems, the surface electric potential and relative refractive index of a charged particle are mathematically expressed by amplitude ratio and phase difference, and a method to estimate the surface potential and the relative refractive index are proposed based on the observation of EM wave signals.
PACS: 41.20.-q – Applied classical electromagnetism / 14.80.-j – Other particles (including hypothetical) / 42.25.Bs – Wave propagation, transmission and absorption
© EPLA, 2016