Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas

Bibliographic Details
Main Author:	Goldberg, Benjamin M.
Language:	English
Published:	The Ohio State University / OhioLINK 2012
Subjects:	Mechanical Engineering Plasma Diagnostic Technique
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1354303147

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu13543031472021-08-03T06:06:46Z Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas Goldberg, Benjamin M. Mechanical Engineering Plasma Diagnostic Technique In this thesis, a novel technique is presented to take measurements of an electric field which develops and changes rapidly in time. The motivation arises for such field measurements from the developing field of plasma assisted combustion (PAC) where nanosecond pulsed plasmas are used to increase the efficiency of the combustion process. Optically based noninvasive field measurements, while not trivially performed, are useful diagnostic tools to experimentally determine how the electric field varies in both space and time. The technique presented here is a four wave mixing technique which works similarly to coherent anti-Stokes Raman scattering (CARS) and is thus called E-Field CARS for short. Mixing collinear pump and Stokes beams with an external electric field will result in radiation emitted at the Q(1) frequency of the molecules interrogated, the H2 molecule for the body of work presented here. The IR radiation scales by the square of the electric field which leads to large signal to noise ratios (~1000) in the presence of a strong external electric field. The use a picoseconds laser system in theory would give information about the field development with sub-nanosecond precision. However, the laser itself produces an inherent source of variation in accuracy of the timing measurements. Thus, while the overall high voltage pulse shape can be accurately resolved in both field strength and overall pulse duration, each individual data point collected is accurately known to within ~10 nanoseconds, or the inherent jitter within the laser. 2012-12-18 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1354303147 http://rave.ohiolink.edu/etdc/view?acc_num=osu1354303147 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Mechanical Engineering Plasma Diagnostic Technique
spellingShingle	Mechanical Engineering Plasma Diagnostic Technique Goldberg, Benjamin M. Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas
author	Goldberg, Benjamin M.
author_facet	Goldberg, Benjamin M.
author_sort	Goldberg, Benjamin M.
title	Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas
title_short	Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas
title_full	Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas
title_fullStr	Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas
title_full_unstemmed	Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas
title_sort	picosecond electric field cars; a diagnostic technique to measure the electric field development within nanosecond repetitively pulsed plasmas
publisher	The Ohio State University / OhioLINK
publishDate	2012
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1354303147
work_keys_str_mv	AT goldbergbenjaminm picosecondelectricfieldcarsadiagnostictechniquetomeasuretheelectricfielddevelopmentwithinnanosecondrepetitivelypulsedplasmas
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Picosecond Electric Field CARS; A Diagnostic Technique to Measure the Electric Field Development within Nanosecond Repetitively Pulsed Plasmas

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