Electron Temperature Evolution in Expanding Ultracold Neutral Plasmas

Abstract

We have used the free expansion of ultracold neutral plasmas as a time-resolved probe of electron temperature. A combination of experimental measurements of the ion expansion velocity and numerical simulations characterize the crossover from an elastic-collision regime at low initial Gamma_e, which is dominated by adiabatic cooling of the electrons, to the regime of high Gamma_e in which inelastic processes drastically heat the electrons. We identify the time scales and relative contributions of various processes, and experimentally show the importance of radiative decay and disorder-induced electron heating for the first time in ultracold neutral plasmas.

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Cited by in corpus (31)

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• Cold and Ultracold Rydberg Atoms in Strong Magnetic Fields
• Strongly Coupled Plasmas via Rydberg-Blockade of Cold Atoms
• Ultracold Plasma Expansion in a Magnetic Field
• The limit of strong ion coupling due to electron shielding
• Observation of an ultracold plasma instability
• Rydberg atom formation in strongly correlated ultracold plasmas
• Ion Temperature Evolution in an Ultracold Neutral Plasma
• The very slow expansion of an ultracold plasma formed in a seeded supersonic molecular beam of NO
• Recombination fluorescence in ultracold neutral plasmas
• Ultrafast Electron Cooling in an Expanding Ultracold Plasma
• Demonstrating Universal Scaling in Quench Dynamics of a Yukawa One-Component Plasma
• Density-Dependent Response of an Ultracold Plasma to Few-Cycle Radio-Frequency Pulses
• High Resolution Ionization of Ultracold Neutral Plasmas
• Influence of Electron Evaporative Cooling on Ultracold Plasma Expansion
• Electron Evaporation from an Ultracold Plasma in a Uniform Electric Field
• Measurement and simulation of laser-induced fluorescence from non-equilibrium ultracold neutral plasmas
• Heating and cooling of electrons in an ultracold neutral plasma using Rydberg atoms
• Expansion of Ultracold Neutral Plasmas with Exponentially Decaying Density Distributions
• Emergence of Kinetic Behavior in Streaming Ultracold Neutral Plasmas
• Heating mechanisms in radio frequency driven ultracold plasmas
• Ultracold Plasma Expansion as a Function of Charge Neutrality
• The role of collisions and strong coupling in ultracold plasmas
• Microwave Diagnostics of Ultracold Neutral Plasma
• Expansion of an ultracold Rydberg plasma
• What is the temperature of an ultra-cold Rydberg plasma?
• The Barkas Effect in Plasma Transport
• Evaluation of Charged Particle Evaporation Expressions in Ultracold Plasmas
• Magnetic Confinement of an Ultracold Neutral Plasma
• The Effect of Magnetization on Electron Heating in Low-Density Ultracold Neutral Plasmas