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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper THN6

Light-induced drift, separation, and detection of microadmixtures

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Abstract

Light-induced drift (LID) discovered in 19791,2 is one of the strongest effects of radiation action on gas motion. Traveling-wave radiation, acting on the resonant transition of one of the components of the gas mixture, causes the drift of the components with respect to each other. The drift is caused by velocity-selective (due to the Doppler effect) excitation of the resonant component and the difference in transport cross section of excited and unexcited particles in the collisions with particles of the buffer components. The drift motion is possible both in the direction of the radiation propagation and in the opposite direction, in principle, the drift velocity can reach the magnitude of the thermal velocity. To date drift velocities of some dozens of m/s were obtained in the experiments.3

© 1989 Optical Society of America

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