The Role of Excited Atoms in UV Photopreionization TEA Lasers

Norman S. Kopeika

doi:10.1109/JQE.1977.1069264

The Role of Excited Atoms in UV Photopreionization TEA Lasers

Norman S. Kopeika

Department of Electrical & Computer Engineering

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A simple model of photoionization of excited atoms by UV photons from capacitor spark discharges is suggested to explain theimprovement in both plasma density production and laser efficiency noticed by several investigators when the proportion of helium inhigh-pressure COj laser mixtures is increased. Such improvementswith increased He proportion take place both with and without seedingwith low ionization potential dopants. The model is also applicableto explaining the arc suppression qualities of helium as well as theability to ignite discharges at higher total pressures when the proportion of helium is increased. Several implications regarding future TEAlaser work are suggested.

Original language	English
Pages (from-to)	968-972
Number of pages	5
Journal	IEEE Journal of Quantum Electronics
Volume	13
Issue number	12
DOIs	https://doi.org/10.1109/JQE.1977.1069264
State	Published - 1 Jan 1977

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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abstract = "A simple model of photoionization of excited atoms by UV photons from capacitor spark discharges is suggested to explain theimprovement in both plasma density production and laser efficiency noticed by several investigators when the proportion of helium inhigh-pressure COj laser mixtures is increased. Such improvementswith increased He proportion take place both with and without seedingwith low ionization potential dopants. The model is also applicableto explaining the arc suppression qualities of helium as well as theability to ignite discharges at higher total pressures when the proportion of helium is increased. Several implications regarding future TEAlaser work are suggested.",

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AB - A simple model of photoionization of excited atoms by UV photons from capacitor spark discharges is suggested to explain theimprovement in both plasma density production and laser efficiency noticed by several investigators when the proportion of helium inhigh-pressure COj laser mixtures is increased. Such improvementswith increased He proportion take place both with and without seedingwith low ionization potential dopants. The model is also applicableto explaining the arc suppression qualities of helium as well as theability to ignite discharges at higher total pressures when the proportion of helium is increased. Several implications regarding future TEAlaser work are suggested.

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The Role of Excited Atoms in UV Photopreionization TEA Lasers

Abstract

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