This article is cited in 6 papers

Extreme light fields and their interaction with matter

Formula for the ionisation rate of an atom or ion in a strong electromagnetic field for numerical simulation

A. A. Golovanov, I. Yu. Kostyukov

Federal Research Center The Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod

Abstract: A formula is proposed for calculating the rate of field ionisation of an atom or ion, taking into account both tunnel ionisation and barrier suppression ionisation. Compared with the previous formula proposed in 2018, it more accurately describes the transition region between both ionisations and is determined mainly by two parameters: the ionisation potential of an atom or ion and the amplitude of an external electric field. This makes the presented formula suitable for use in numerical packages simulating the interaction of high-power laser radiation with matter by the particle-incell (PIC) method.

Keywords: field ionisation, atoms, ions, tunnel ionisation, barrier suppression ionisation, particle-in-cell method.

Received: 26.02.2020

 English version: Quantum Electronics, 2020, 50:4, 350–353

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