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

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Abstract
Using recent measurements of multiphoton free-free transitions in e-Ar scattering in the presence of a CO2 laser as reference data, an analysis is made of the role different properties of realistic lasers may play in affecting the cross sections of multiphoton transitions. Single-mode and N-mode fields are considered with and without given statistics, emphasis being placed on few-mode cases. Spatial and temporal inhomogeneities, accounting respectively for the focusing and pulsed regimes, are also taken into account. While a complete and detailed agreement is probably out of the question at the present due to incomplete knowledge of all the experimental conditions, the basic and most important features are reproduced with satisfactory agreement. To achieve this agreement a decisive role is played by spatial and temporal inhomogeneities irrespective of the particular laser model in which they are considered.

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