Ion Temperature Evolution in an Ultracold Neutral Plasma
arXiv:1501.06944 · doi:10.1063/1.4915135
Abstract
We study the long-time evolution of the ion temperature in an expanding ultracold neutral plasma using spatially resolved, laser-induced-fluorescence spectroscopy. Adiabatic cooling reduces the ion temperature by an order of magnitude during the plasma expansion, to temperatures as low as 0.2 K. Cooling is limited by heat exchange between ions and the much hotter electrons. We also present evidence for an additional heating mechanism and discuss possible sources. Data are described by a model of the plasma evolution, including the effects of ion-electron heat exchange. We show that for appropriate initial conditions, the degree of Coulomb coupling of ions in the plasma increases during expansion.
References in corpus (27)
- Creation of an Ultracold Neutral Plasma
- Thermal Relaxation in Young Neutron Stars
- Plasma Oscillations and Expansion of an Ultracold Neutral Plasma
- Equation of state of fully ionized electron-ion plasmas
- Using Absorption Imaging to Study Ion Dynamics in an Ultracold Neutral Plasma
- Coulomb crystallization in expanding laser-cooled neutral plasmas
- Kinetic modelling and molecular dynamics simulation of ultracold neutral plasmas including ionic correlations
- Evolution of Ultracold, Neutral Plasmas
- Molecular Dynamics Simulations of Temperature Equilibration in Dense Hydrogen
- Fluorescence measurements of expanding strongly-coupled neutral plasmas
- Ion Acoustic Waves in Ultracold Neutral Plasmas
- Electron Temperature of Ultracold Plasmas
- Using Three-Body Recombination to Extract Electron Temperatures of Ultracold Plasmas
- Experimental Realization of an Exact Solution to the Vlasov Equations for an Expanding Plasma
- Electron Temperature Evolution in Expanding Ultracold Neutral Plasmas
- Preparation and spectroscopy of a metastable Mott insulator state with attractive interactions
- Velocity Relaxation in a Strongly Coupled Plasma
- Relaxation to non-equilibrium in expanding ultracold neutral plasmas
- Expansion of a finite size plasma in vacuum
- Temperature Relaxation in Hot Dense Hydrogen
- The limit of strong ion coupling due to electron shielding
- Electronic detection of collective modes of an ultracold plasma
- Fundamental Photoemission Brightness Limit from Disorder Induced Heating
- Recombination fluorescence in ultracold neutral plasmas
- Influence of electron-ion collisions on Coulomb crystallization of ultracold neutral plasmas
- Adiabatic cooling of trapped nonneutral plasmas
- High Resolution Ionization of Ultracold Neutral Plasmas
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- Experimental measurement of non-Markovian dynamics and self-diffusion in a strongly coupled plasma
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- Demonstrating Universal Scaling in Quench Dynamics of a Yukawa One-Component Plasma
- Ion friction at small values of the Coulomb logarithm
- Reduction of electron heating by magnetizing ultracold neutral plasma
- Expansion of Ultracold Neutral Plasmas with Exponentially Decaying Density Distributions
- Energy transfer in elastic collisions between electrons and trapped ions
- Electron trapping in freely expanding ultracold neutral plasmas
- Combined molecular dynamics and quantum trajectories simulation of laser-driven, collisional systems
- The Barkas Effect in Plasma Transport