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

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...

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Veröffentlicht in:	Quantum electronics (Woodbury, N.Y.) N.Y.), 2020-04, Vol.50 (4), p.350-353
Hauptverfasser:	Golovanov, A.A., Kostyukov, I.Yu
Format:	Artikel
Sprache:	eng
Schlagworte:	AMPLITUDES atoms barrier suppression ionisation COMPARATIVE EVALUATIONS Computer simulation COMPUTERIZED SIMULATION ELECTRIC FIELDS ELECTROMAGNETIC FIELDS Engineering Engineering, Electrical & Electronic field ionisation Field ionization High power lasers INTERACTIONS IONIZATION POTENTIAL Ionization potentials IONS LASER RADIATION Particle in cell technique particle-in-cell method Physical Sciences Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Physics, Applied Quantum Science & Technology Science & Technology Technology tunnel ionisation
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Beschreibung
Zusammenfassung:	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-in-cell (PIC) method.
ISSN:	1063-7818 1468-4799
DOI:	10.1070/QEL17309