Temperature and mean axial momentum vs. laser intensity of electrons released from O₂ by an 800 nm ultrashort pulsed laser

2025/09/13 by E.L. Ruden, Ruden, Edward L.
Engineering · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Laser Design and Applications #Laser Material Processing Techniques #Laser-Matter Interactions and Applications #Optics (physics.optics) #Plasma Physics (physics.plasm-ph)

paper · pdf · doi:10.48550/arxiv.2509.10986

openalex publication_date 2025/09/13 · openalex created_date 2025/10/12 · openalex updated_date 2026/07/28

Abstract

A semi-empirical model is presented for the thermalized temperature T and mean momentum in the direction of laser propagation <p_fz> of electrons released from O₂ after the passage of a focused 800 nm ultrashort pulsed laser pulse vs. peak laser intensity I₀ to provide initial conditions for electrodynamic fluid simulations. For this, theoretical kinetic energy spectra in different directions are modified with two adjustable parameters representing the effects of electron rescatter off its parent ion during the optical cycle subsequent to ionization. The classical kinematics of rescatter, in conjunction with the spectral fits, is used to estimate <p_fz>.

Citations

• Ionization rate vs. laser intensity determined from ion count vs. peak intensity due to neutral gas exposure to an 800 nm ultrashort pulsed laser
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• Ionization rate vs. laser intensity determined from ion count vs. peak intensity due to neutral gas exposure to an 800 nm ultrashort pulsed laser

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