Measurement and simulation of laser-induced fluorescence from nonequilibrium ultracold neutral plasmas

作者：Denning A^*; Bergeson S D; Robicheaux F

来源：Physical Review A, 2009, 80(3): 033415.

DOI：10.1103/PhysRevA.80.033415

We report measurements and simulations of laser-induced fluorescence in ultracold neutral plasmas. We focus on the earliest times, when the plasma equilibrium is evolving and before the plasma expands. In the simulation, the ions interact via the Yukawa potential in a small cell with wrapped boundary conditions. We solve the optical Bloch equation for each ion in the simulation as a function of time. Both the simulation and experiment show the initial increase in ion fluorescence, disorder-induced heating, and coherent oscillation of the rms ion velocity. Detailed modeling of the fluorescence signal makes it possible to use fluorescence spectroscopy to probe ion dynamics in ultracold and strongly coupled plasmas.

• 出版日期2009-9