Towards Laser Intensity Calibration Using High-Field Ionization

Ciappina, Marcelo F.; Bulanov, Sergei V.; Ditmire, T.; Korn, G.; Weber, S.

doi:10.1007/978-3-030-47098-2_8

Cited by 2 publications

(3 citation statements)

References 40 publications

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“…Recently, several effects have been discussed and numerically examined as possible tools for the determination of laser peak intensities in the ultrahigh-power regime. In [10,11] sequential tunneling ionization of multielectron atoms has been considered. It was shown that, owing to the highly nonlinear dependence of the tunneling ionization rate on the electric field strength of the laser wave, the maximal charge state of a given atomic specie produced in the laser focus appears highly sensitive to the peak value of intensity.…”

Section: Introductionmentioning

confidence: 99%

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Diagnostics of ultra-intense laser pulses using tunneling ionization

Ciappina

Popruzhenko

2020

Laser Phys. Lett.

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We revisit a recently proposed scheme [M.F. Ciappina et al 2019 Phys. Rev. A 99 043405] for accurate measurement of electromagnetic radiation intensities in a focus of high-power laser beams. The method is based on the observation of multiple sequential tunneling ionization of atoms and suggests determination of the peak intensity value from the appearance in the focal area ions with a certain charge number. Here we study the sensitivity of the approach to two essential factors: the focal volume effect and the tunneling ionization model chosen to calculate ionization rates. We show, on the one hand, that the results appear almost model independent for ionization of helium-and hydrogen-like ions and, on the other hand, that the focal averaging leaves the intensity-dependent features visible. Our findings are in favor to a practical implementation of the atomic diagnostics of extreme laser intensities.

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Section: Introductionmentioning

confidence: 99%

“…In this paper, we analyze the atomic diagnostics introduced in [10,11]. Our purpose is to check the sensitivity of the method with respect to two essential factors present in experiment and in the theory.…”

Section: Introductionmentioning

confidence: 99%

Diagnostics of ultra-intense laser pulses using tunneling ionization

Ciappina

Popruzhenko

2020

Laser Phys. Lett.

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“…Strong-field ionization of atoms has been proposed as a means of estimating the peak intensity of laser pulses having an intensity of I > 10 20 W/cm 2 [1][2][3][4][5]. Such ultra-intense laser pulses are becoming available at several facilities worldwide, two examples being the ELI Beamlines [6] and the Shanghai super-intense ultrafast laser facility [7].…”

Section: Introductionmentioning

confidence: 99%

Static-field ionization model of He-like ions for diagnostics of light-field intensity

2020

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We study static-field ionization of He-like ions with nuclear charge number in the range of 2 ≤ Z ≤ 36. Both the tunneling and over-the-barrier regimes are considered. We calculate the ionization rates by three approximate methods: a fitting formula based on the Perelemov-Popov-Terent'ev (PPT) formula, a perturbative expansion in powers of 1/Z, and a single-active electron approximation, and compare them with reference ionization rates computed by the multiconfiguration time-dependent Hartree-Fock (MCTDHF) approach. The relative deviation of the rates computed by the PPT-based fitting formula and the third-order perturbation theory from the rates computed by the MCTDHF approach is found to be around 10%. We discuss quantitatively the contribution from the exchange interaction during the ionization by comparing the single-active electron rates and the reference rates in which multielectron effects are included. We find that a single-active electron approximation, where the exchange interaction is neglected, results in the overestimation of the ionization rates by 30% for He and 2% for He-like Kr, showing that the magnitude of the effect of the exchange interaction scales approximately as 1/Z.

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Towards Laser Intensity Calibration Using High-Field Ionization

Cited by 2 publications

References 40 publications

Diagnostics of ultra-intense laser pulses using tunneling ionization

Diagnostics of ultra-intense laser pulses using tunneling ionization

Static-field ionization model of He-like ions for diagnostics of light-field intensity

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