Ion Acoustic Waves in Ultracold Neutral Plasmas

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.

4 pages, 4 figures

References in corpus (4)

• Self-consistent Coronal Heating and Solar Wind Acceleration from Anisotropic Magnetohydrodynamic Turbulence
• Ultracold Neutral Plasmas
• What Do Electromagnetic Plasmas Tell Us about Quark-Gluon Plasma?
• Observation of an ultracold plasma instability

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• Experimental measurement of non-Markovian dynamics and self-diffusion in a strongly coupled plasma
• The limit of strong ion coupling due to electron shielding
• Rydberg atom formation in strongly correlated ultracold plasmas
• Electronic detection of collective modes of an ultracold plasma
• Ion Temperature Evolution in an Ultracold Neutral Plasma
• Arrested relaxation in an isolated molecular ultracold plasma
• Density-Dependent Response of an Ultracold Plasma to Few-Cycle Radio-Frequency Pulses
• High Resolution Ionization of Ultracold Neutral Plasmas
• Extreme driven ion acoustic waves
• Expansion of Ultracold Neutral Plasmas with Exponentially Decaying Density Distributions
• Emergence of Kinetic Behavior in Streaming Ultracold Neutral Plasmas
• Excitation and control of chirped nonlinear ion acoustic waves