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arXiv · 2306.09611

Multi-MeV electrons from above-threshold ionization of the neon K-shell

A. Yandow·T. N. Ha·C. Aniculaesei·H. L. Smith·C. G. Richmond·M. M. Spinks·H. J. Quevedo·S. Bruce·M. Darilek·C. Chang·D. A. Garcia·E. Gaul·M. E. Donovan·B. M. Hegelich·T. Ditmire
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Abstract

We present measurements of integrated electron energies produced by above-threshold ionization (ATI) of neon in a laser field with intensity exceeding 10$^{20}$ W/cm$^{2}$. We observe electrons with energy exceeding 10 MeV ejected in the laser forward direction above a threshold intensity of $2 \times 10^{20}$ W/cm$^{2}$. We compare to ATI models using both tunneling (ADK-PPT) and barrier suppression ionization and observe the onset of ATI at a higher threshold intensity than predicted by these models.

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A. Yandow, T. N. Ha, C. Aniculaesei, H. L. Smith, C. G. Richmond, M. M. Spinks, H. J. Quevedo, S. Bruce, M. Darilek, C. Chang, D. A. Garcia, E. Gaul, M. E. Donovan, B. M. Hegelich, T. Ditmire. 2023-06-16. Multi-MeV electrons from above-threshold ionization of the neon K-shell. https://arxiv.org/abs/2306.09611

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