Dynamic Theory of Charged Dust Grains Above the Lunar Surface
S.B. Rakesh Chandran, S.R. Rajesh, A. Abraham, G. Renuka, Chandu Venugopal, P. Pooja, J. Jeshma
The near surface electric field generated on the surface of the Moon causes the levitation of charged dust grains above the lunar surface. The levitated dust grains are continuously adjusting their charge distributions with the surrounding plasma to reach to different levitation heights. This study presents dust levitation mechanism modeled from Poisson equation for different grain radii at different electron temperatures. To discuss the dynamical behaviour of lofted dust grains above the lunar surface, an analytical theory was developed for the first time. The calculation strongly reflects the dependence of grain radius and electron temperature on levitation height. During SEPs, at , radius grain was levitated to a maximum height of and the same was levitated to a height of at . Potential profile versus distance from the lunar surface was also studied, an important consideration for calculating the maximum levitation height for a grain of specific radius.