Ion Acoustic Waves in Ultracold Neutral Plasmas

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2010
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American Physical Society
Abstract

We photoionize laser-cooled atoms with a laser beam possessing spatially periodic intensity modulations to create ultracold neutral plasmas with controlled density perturbations. Laser-induced fluorescence imaging reveals that the density perturbations oscillate in space and time, and the dispersion relation of the oscillations matches that of ion acoustic waves, which are long-wavelength, electrostatic, density waves.

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Castro, J., McQuillen, P. and Killian, T.C.. "Ion Acoustic Waves in Ultracold Neutral Plasmas." Physical Review Letters, 105, (2010) American Physical Society: 65004. http://dx.doi.org/10.1103/PhysRevLett.105.065004.

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