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Filament Plasma Density Enhancement Using Two Co-Propagating Beams

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Date Issued:
2019
Abstract/Description:
Filaments are self-guided plasma channels generated from laser pulses with power above a critical value. They can propagate several times the Rayleigh length for diffraction and can travel through adverse atmospheric conditions. As such, filaments are useful in applications such as long wavelength electromagnetic and electric discharge guiding, and weather manipulation to name a few. Arrays of filaments can be useful to these applications, particularly in the generation of waveguides. However, understanding the filament-induced plasma dynamics of two closely propagating beams is crucial in designing the ideal waveguide. One common way to characterize a filament is through the electron density of the plasma channel, a property which has previously been proven to be clamped for a single filament. This work will show how the electron density can be enhanced through the use of two co-propagating beams, taking advantage of their interaction. Three cases were studied: two sub-critical beams, one subcritical beam and one filament, and two filaments. The separations and focusing conditions of the beams were also varied. Enhancement of the electron density and lengthening of the plasma lifetime will be discussed for each case.
Title: Filament Plasma Density Enhancement Using Two Co-Propagating Beams.
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Name(s): Pena, Jessica, Author
Richardson, Martin, Committee Chair
Moharam, Jim, Committee Member
Gaume, Romain, Committee Member
Rostami Fairchild, Shermineh, Committee Member
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2019
Publisher: University of Central Florida
Language(s): English
Abstract/Description: Filaments are self-guided plasma channels generated from laser pulses with power above a critical value. They can propagate several times the Rayleigh length for diffraction and can travel through adverse atmospheric conditions. As such, filaments are useful in applications such as long wavelength electromagnetic and electric discharge guiding, and weather manipulation to name a few. Arrays of filaments can be useful to these applications, particularly in the generation of waveguides. However, understanding the filament-induced plasma dynamics of two closely propagating beams is crucial in designing the ideal waveguide. One common way to characterize a filament is through the electron density of the plasma channel, a property which has previously been proven to be clamped for a single filament. This work will show how the electron density can be enhanced through the use of two co-propagating beams, taking advantage of their interaction. Three cases were studied: two sub-critical beams, one subcritical beam and one filament, and two filaments. The separations and focusing conditions of the beams were also varied. Enhancement of the electron density and lengthening of the plasma lifetime will be discussed for each case.
Identifier: CFE0007702 (IID), ucf:52436 (fedora)
Note(s): 2019-08-01
M.S.
Optics and Photonics, Optics and Photonics
Masters
This record was generated from author submitted information.
Subject(s): laser filamentation -- ultrafast laser
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0007702
Restrictions on Access: campus 2024-08-15
Host Institution: UCF

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