9 July 2007 Ionization detection scheme for 1s-2s spectroscopy in atomic hydrogen
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Abstract
We purpose a new method for 1s-2s spectroscopy of atomic hydrogen. Our method is based on a new detection scheme, utilizing a three-photon ionization to obtain a signal correspondent to the excitation of atoms into 2s state. We report about assembling and test of a proton detection system for this measurement. To measure a second order Doppler shift we purpose a delayed detection scheme. Using this method we plan to reduce the uncertainty of the absolute frequency measurement to the 10-15 domain.
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A. Matveev, N. Kolachevsky, J. Alnis, T. W. Hänsch, "Ionization detection scheme for 1s-2s spectroscopy in atomic hydrogen", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67270K (9 July 2007); doi: 10.1117/12.752279; https://doi.org/10.1117/12.752279
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