Coherent microwave scattering from xenon resonance-enhanced multiphoton ionization-initiated plasma in air

Christopher A. Galea, Mikhail N. Shneider, Mark Gragston, Zhili Zhang

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Abstract

Here we present the experimental and computational study of resonance-enhanced multiphoton ionization (REMPI) of xenon and subsequent avalanche ionization of air. Xenon was excited from the ground state to the excited 6p state (89 162 cm - 1) by two photons at 224.3 nm. The third photon at 224.3 nm subsequently produced ionization of xenon in air. The seed electrons from the ionization served as the medium to further absorb the laser pulse for the rotational and vibrational excitation and avalanche ionization of O 2 and N 2. Plasma chemistry of O 2 and N 2 in air was included in the model. The results are useful for understanding REMPI-initiated plasma in air and possibly new diagnostics tools based on REMPI-initiated plasma emissions.

Original languageEnglish (US)
Article number053301
JournalJournal of Applied Physics
Volume127
Issue number5
DOIs
StatePublished - Feb 7 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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