Laser spectroscopic electric field measurement in krypton

Kampschulte, T.; Schulze, J.; Luggenholscher, D.; Bowden, M. D. and Czarnetzki, U. (2007). Laser spectroscopic electric field measurement in krypton. New Journal of Physics, 9(18)



A laser spectroscopic method for sensitive electric field measurements using krypton has been developed. The Stark effect of high Rydberg states of the krypton autoionizing series can be measured by a technique called fluorescence dip spectroscopy (FDS) with high spatial and temporal resolution. Calibration measurements have been performed in a reference cell with known electric field and they agree very well with numerical solutions of Schrodinger's equation for jl-coupled states. The application of this method has been demonstrated in the sheath region of a capacitively coupled radiofrequency (RF) discharge. The laser spectroscopic method allows us to add krypton as a small admixture to various low temperature plasmas.

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