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Bulletin of the American Physical Society

Velocity Changing Collisions and Optical Pumping in Ultracold Neutral Plasmas

Jose Castro, T. C. Killian

Published May 23, 2009• 0 citations
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Ion-collisional frequency measurements through optical pumping in Ultracold Neutral Plasmas

Jose Castro, T. C. Killian

Ion-collisional frequency measurements were performed in Strontium Ultracold Neutral Plasmas (UNP) through optical pumping between the two ground level spin states. Sr ground state ions can be optically pumped into a spin dark state through the use of appropriate circularly-polarized light. This optical pumping can be strongly affected by collisions between ions. Fluorescence measurements on UNPs show that velocity changing collisions between ions slow down the pumping rate into the dark ground level spin state.

Journal of Physics Conference Series•Nov 1, 2009•0 citations
Ion-collisional frequency measurements were performed in Strontium Ultracold Neutral Plasmas (UNP) through optical pumping between the two ground level spin states. Sr ground state ions can be optically pumped into a spin dark state through the use of appropriate circularly-polarized light. This optical pumping can be strongly affected by collisions between ions. Fluorescence measurements on UNPs show that velocity changing collisions between ions slow down the pumping rate into the dark ground level spin state.