Ion acoustic waves in ultracold neutral plasmas.
作者： J. Castro , P. McQuillen , T. C. Killian
DOI: 10.1103/PHYSREVLETT.105.065004
关键词: Intensity (physics) 、 Physics 、 Modulation (music) 、 Ion 、 Ion acoustic wave 、 Dispersion relation 、 Acoustic wave 、 Atomic physics 、 Plasma 、 Laser
摘要: We photoionize laser-cooled atoms with a laser beam possessing spatially periodic intensity modulations to create ultracold neutral plasmas controlled density perturbations. Laser-induced fluorescence imaging reveals that the perturbations oscillate in space and time, dispersion relation of oscillations matches ion acoustic waves, which are long-wavelength, electrostatic, waves.
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