Feasibility of coherent xuv spectroscopy on the 1S-2S transition in singly ionized helium

M. Herrmann, M. de Haas, U.D. Jentschura, F. Kottmann, D. Leibfried, G. Saathoff, C. Gohle, A. Ozawa, V. Batteiger, S. Knunz, N. Kolachevsky, H.A. Schussler, T.W. Hansch, T. Udem

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The 1S-2S two-photon transition in singly ionized helium is a highly interesting candidate for precision tests of bound-state quantum electrodynamics (QED). With the recent advent of extreme ultraviolet frequency combs, highly coherent quasi-continuous-wave light sources at 61 nm have become available, and precision spectroscopy of this transition now comes into reach for the first time. We discuss quantitatively the feasibility of such an experiment by analyzing excitation and ionization rates, propose an experimental scheme, and explore the potential for QED tests. © 2009 The American Physical Society.
Original languageEnglish
JournalPhysical Review A. Atomic, Molecular and Optical Physics
Volume79
Issue number5
DOIs
Publication statusPublished - 2009

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