Electron scattering in strong laser fields. Theoretical models versus recent experiments

Bivona, S.; Burlon, R.; Zangara, Rosalia; Ferrante, G.

doi:10.1088/0022-3700/18/15/020

Cited by 22 publications

(4 citation statements)

References 11 publications

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“…Previous work [32] has shown that the agreement between theory and early experiments with a strongly focused laser [33] can be improved by taking into account the spatial N γ = 1 Figure 7. Signals calculated using the low-frequency approximation for various peak intensities, averaged over the interaction volume.…”

Section: Influence Of the Angle Between The Incident Electron Momentumentioning

confidence: 85%

“…Previous work [32] has shown that the agreement between theory and early experiments with a strongly focused laser [33] can be improved by taking into account the spatial and temporal distributions of the three beams involved. These effectively determine the number of scattering events occurring in regions of high or low intensities.…”

Section: Averaging Over the Spatial Distribution Of The Three Beams A...mentioning

confidence: 99%

See 1 more Smart Citation

Experimental and theoretical study of free–free electron–helium scattering in a CO₂laser field

Nehari

Holmes

Dunseath

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. Free-free transitions during the scattering of electrons by helium in the presence of a linearly polarized CO 2 laser field are investigated both experimentally and theoretically. Signals for laser-assisted scattering at 22 eV with absorption or emission of up to two photons are measured at scattering angles between 20 o and 70 o , and are compared to the values obtained from an 11-state R-matrix Floquet calculation as well as using the low-frequency approximation of Kroll and Watson. The two sets of theoretical results are found to be in very good agreement for the scattering geometries considered in the experiment. The order of magnitude of the experimental results is reproduced by calculations with intensities in the region of 10 7 W cm −2 . Agreement is improved by averaging the theoretical results over the spatial distributions of the three beams as well as the temporal intensity profile of the laser pulse, and by allowing for some misalignment of the three beams in the experiment.

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Section: Influence Of the Angle Between The Incident Electron Momentumentioning

confidence: 85%

Section: Averaging Over the Spatial Distribution Of The Three Beams A...mentioning

confidence: 99%

Experimental and theoretical study of free–free electron–helium scattering in a CO₂laser field

Nehari

Holmes

Dunseath

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…On the other hand, in order to reproduce the measured signals accurately, the conditions of the overlap between the three beams should be included in the calculations. It has been shown that improving the accuracy of the calculations requires taking into consideration the spatial and temporal distributions of the three beams involved in the scattering process [43,44]. Here, we performed a cubic interpolation of the temporal laser profile in the KWA calculation to average the signal.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Excitation of Helium by Means of an Electron and a Photon: A Joined Experimental and Theoretical Study

Ajana

Nehari

Khalil

et al. 2021

Atoms

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We report on a joined experimental and theoretical study of differential cross-sections resulting from inelastic scattering of a monoenergetic electron by helium atoms in the presence of an intense carbon dioxide laser. In particular, we measured the signals of the scattered electrons during the simultaneous electron–photon excitation of He 21P state for the first three microseconds of the laser pulse. The signals were measured for an incident electron energy of 45 eV and showed a structure that emerged at small scattering angles. The latter was found to be sensitive to the nature of the transferred photons, as well as the intensity of the laser field. The experimental findings were supported by quantum calculations based on the second-order Born approximation in which the correlated electron–electron interactions were taken into account.

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“…A detailed comparison between the experimental data and the theoretical calculations must take into account the actual experimental conditions, such as beam focusing and pulsed and possibly multi-mode operation of the laser. The spatial and temporal inhomogeneities of laser beams and their influence on laser-assisted electron-atom measurements have been investigated theoretically by Bivona et al [82] and Francken and Joachain [83].…”

Section: Laser-assisted (E 2e) Collisions In Atomic Hydrogen In the mentioning

confidence: 99%

Laser-Assisted (e, 2e) Collisions in the Symmetric/Asymmetric Coplanar Geometry

Makhoute

Khalil

Ajana

2019

Atoms

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In this review, we present a comprehensive survey of laser-assisted (e, 2e) reactions. The influence of a laser field on the dynamics of (e, 2e) collisions in atomic hydrogen is analyzed in the symmetric and asymmetric coplanar geometries. Particular attention is devoted to the construction of the dressed (laser-modified) target wave functions, in both the initial and final states. The calculation is performed in the framework of Coulomb-Volkov-Born approximation, where the initial and final electrons are described by Volkov wave functions, while the interaction of the incident electron with the target atom is treated in the first and the second Born approximation. The state of the ejected electron is described by a Volkov/Coulomb-Volkov wave function. A detailed account is also given of the techniques we have used to evaluate the scattering amplitudes. The influence of the laser parameters (frequency, intensity, and direction of polarization) on the angular distribution of the ejected electron is discussed, and a number of illustrative examples are given. The structure of the triple differential cross section in the vicinity of resonances is also analyzed.

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Electron scattering in strong laser fields. Theoretical models versus recent experiments

Cited by 22 publications

References 11 publications

Experimental and theoretical study of free–free electron–helium scattering in a CO₂laser field

Experimental and theoretical study of free–free electron–helium scattering in a CO₂laser field

Simultaneous Excitation of Helium by Means of an Electron and a Photon: A Joined Experimental and Theoretical Study

Laser-Assisted (e, 2e) Collisions in the Symmetric/Asymmetric Coplanar Geometry

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Electron scattering in strong laser fields. Theoretical models versus recent experiments

Cited by 22 publications

References 11 publications

Experimental and theoretical study of free–free electron–helium scattering in a CO2laser field

Experimental and theoretical study of free–free electron–helium scattering in a CO2laser field

Simultaneous Excitation of Helium by Means of an Electron and a Photon: A Joined Experimental and Theoretical Study

Laser-Assisted (e, 2e) Collisions in the Symmetric/Asymmetric Coplanar Geometry

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Product

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Experimental and theoretical study of free–free electron–helium scattering in a CO₂laser field

Experimental and theoretical study of free–free electron–helium scattering in a CO₂laser field