Efficient numerical algorithm for multi-level ionization of high-atomic-number gases

A. Cheng, R. Samulyak, R. Kupfer, J. Pérez-Ríos, N. Vafaei-Najafabadi

Research output: Contribution to journalArticlepeer-review

Abstract

An efficient numerical algorithm for laser driven multi-level ionization of high-atomic-number gases is proposed and implemented in an electromagnetic particle-in-cell code SPACE. The algorithm is based on analytical solutions to the system of differential equations describing ionization evolution. Using analytical solutions resolves the multiscale issue of ionization due to different characteristic time scales of ionization processes and the main code time step. Algorithm efficiency and memory requirements are significantly improved by using a locally reduced system of differential equations. The algorithm also assigns proper orbital quantum numbers and their projections to ionization states. The algorithm is verified and validated using experimental data.

Original languageEnglish
Article number044503
JournalPhysics of Plasmas
Volume31
Issue number4
DOIs
StatePublished - 1 Apr 2024
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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