Measurements of electron numbers in femtosecond laser induced plasma using rayleigh microwave scattering

A. Sharma, M. Slipchenko, X. Wang, K. A. Rehman, A. Shashurin, M. N. Shneider

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


In this work we report direct measurements of absolute plasma electron numbers generated at multiphoton ionization (MPI) of air and sub we precisely determine ionization rate and cross-section of eight-photon ionization of oxygen molecule by 800 nm photons, σ8=(3.32± 0.3).10-130 W-8m16s-1. Subsequently MPI of O2, N2 and Ar was studied at atmospheric pressure. We observed that ionization rate of O2 is much greater than that of N2. We found that ionization rate and cross-section is same for N2 and O2. Method is based on the absolute measurement of electron number created by MPI using elastic scattering of microwaves off the plasma volume in Rayleigh regime and establishes a general approach to directly measure and tabulate basic constants of the MPI process for various gases and photon energies.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105241
StatePublished - 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Publication series

NameAIAA Aerospace Sciences Meeting, 2018


OtherAIAA Aerospace Sciences Meeting, 2018
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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