Observation of nonsequential ionization of helium and its impact on intensity monitoring

David N. Fittinghoff; Paul Robert Bolton; Britton Chang; Kenneth C. Kulander

doi:10.1117/12.147579

8 July 1993 Observation of nonsequential ionization of helium and its impact on intensity monitoring

David N. Fittinghoff, Paul Robert Bolton, Britton Chang, Kenneth C. Kulander

Proceedings Volume 1860, Short-Pulse High-Intensity Lasers and Applications II; (1993) https://doi.org/10.1117/12.147579
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

We have measured the ion yields for helium and neon ionized by 120 femtosecond, 614 nanometer laser pulses with intensities up to 10¹⁶ watts per square centimeter. We have found that the He II and Ne II data exhibit features incompatible with standard nonresonant sequential ionization. These features reduce the usefulness of optical field ionization for monitoring laser intensity. For the experiment, we expect dynamic resonances to have little effect on the ionization, and we attribute the features to nonsequential ionization based on the simultaneous saturation of the features and the singly ionized charge states.

Citation Download Citation

David N. Fittinghoff, Paul Robert Bolton, Britton Chang, and Kenneth C. Kulander "Observation of nonsequential ionization of helium and its impact on intensity monitoring", Proc. SPIE 1860, Short-Pulse High-Intensity Lasers and Applications II, (8 July 1993); https://doi.org/10.1117/12.147579

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