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When two of three pairs of the Gaussian laser beams of a traditional MOT aremisaligned in the racetrack configuration the effective coordinate-dependentvortex force do arise. Then an atom is accelerated by this vortex force untilits velocity not balanced by the damping force. This situation may produce astable ring of revolving atoms of a certain radius. Due to the differentfrequency and laser beams intensity dependences of the vortex, damping andtrapping forces it is possible to equalize the radii of two orbiting groups ofatoms in two-species or dual-isotope magneto-optical trap and so to arrange acontinuing collider of cooled atoms with the prescribed relative velocity. Acollider setup for atoms of two different types rotating with different angularvelocities along the same ring-like trajectory into MOT of the conventionalsix-beam geometry is proposed and designed on example of two rubidium isotopesRb85 and Rb87.Comment: 8 pages, 6 figures. pdf; this paper was reported at ICONO 2005 in  St.-Petersbur

<title>Atomic collider into dual-isotope magneto-optical trap</title>