Focal-shape effects on the efficiency of the tunnel-ionization probe for extreme laser intensities

0534160 - FZÚ 2021 RIV US eng J - Journal Article
Ciappina, Marcelo F. - Peganov, E.E. - Popruzhenko, S.V.
Focal-shape effects on the efficiency of the tunnel-ionization probe for extreme laser intensities.
Matter and Radiation at Extremes. Roč. 5, č. 4 (2020), s. 1-10, č. článku 044401. ISSN 2468-2047. E-ISSN 2468-080X
R&D Projects: GA MŠMT EF16_019/0000789
Grant - others:OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789
Institutional support: RVO:68378271
Keywords : high-field laser-atom interaction * atomic diagnostics * nano-photonics * laser-matter interactions
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 2.845, year: 2020
Method of publishing: Open access

We examine the effect of laser focusing on the effectiveness of a recently discussed scheme [M. F. Ciappina et al., Phys. Rev. A 99, 043405 (2019) and M. F. Ciappina and S. V. Popruzhenko, Laser Phys. Lett. 17, 025301 (2020)] for in situ determination of ultrahigh intensities of electromagnetic radiation delivered by multi-petawatt laser facilities. Using two model intensity distributions in the focus of a laser beam, we show how the resulting yields of highly charged ions generated in the process of multiple sequential tunneling of electrons from atoms depend on the shapes of these distributions. Our findings lead to the conclusion that an accurate extraction of the peak laser intensity can be made either in the near-threshold regime, when the production of the highest charge state happens only in a small part of the laser focus close to the point where the intensity is maximal or through the determination of the points where the ion yields of close charges become equal.
Permanent Link: http://hdl.handle.net/11104/0312391