Formation of Ordered Structures of Charged Macroparticles
in a Photoemission Trap

O. S. Vaulina, A. P. Nefedov, O. F. Petrov*, and V. E. Fortov

Research Center for Thermal Physics of Pulse Effects, Russian Academy of Sciences, Moscow, 127412 Russia
*e-mail: ipdustpl@redline.ru

Received December 31, 1999

Abstract—The possibility of confining positively charged macroscopic dust particles in a unique photoemis-
sion trap was studied. The spatial distributions of the potentials for a cylindrical geometry of a phototrap were
obtained (by the particles in a cell method) and the dynamics of the formation of ordered structures of dust par-
ticles in the potential field of the trap was studied (by the molecular-dynamics method). The dependence of the
number of dust particles confined by a phototrap on the particle energies and sizes and the buffer-gas pressure
were obtained. © 2000 MAIK “Nauka/Interperiodica”.

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