Dust dynamics in cryogenic environment
نویسندگان
چکیده
Theoretical study on dust dynamics under cryogenic environment in a complex plasma is presented. Expansion process and cooling process of highly charged dust particles in a plasma containing background ultracold neutral particles are studied. The processes are described by kinetic theory with Fokker-Planck collision term of the interaction between neutral particles and dust particles. Time evolution of kinetic dust temperature and spatial spread of dust particles are revealed. As dust particles spread in space, the dust temperature decreases drastically in time scale of dust plasma period and cooled to background cryogenic temperature. The dust cloud spreads to some extent but mostly suppressed by the presence of background plasma.
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