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dc.contributor.advisorNeighbours, John R
dc.contributor.authorGoodwin, William A.
dc.dateJune 1988
dc.date.accessioned2012-11-27T18:06:12Z
dc.date.available2012-11-27T18:06:12Z
dc.date.issued1988-06
dc.identifier.urihttp://hdl.handle.net/10945/22941
dc.descriptionApproved for public release; distribution is unlimited
dc.description.abstractA CO2 laser was used to generate reduced-density channels in various gas mixtures of ammonia and nitrogen. Interferometers were used to record the changing density resulting from the NH3 absorption of the CO2 laser radiation. One method used to determine the characteristics of the channel was based on the assumption that the resulting density profile was Gaussian shaped. The second method used the Abel Integral Transformation, requiring no pre-conditions on the density profile expect that it was cylindrically symmetric. While used extensively in plasma spectroscopy, this technique is not generally well known for analyzing interferometric data. The results show that for a fixed laser energy long, shallow reduced density channels were formed in gas mixtures of low ammonia concentration and short, deep channels were formed in gas mixtures high ammonia concentration. These results qualitatively agree with an earlier experiment in which gas mixtures of nitrogen and sulfur-hexafluoride were used. Both experiments support the concept of reduced-density channel formation and lay the foundation for future studies of relativistic electron beam propagation for application in the Strategic Defense Initiative.en_US
dc.description.urihttp://archive.org/details/characteristicso00good
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.subject.lcshPhysicsen_US
dc.titleThe characteristics of reduced-density channels in NH3-N2 gas mixturesen_US
dc.typeThesisen_US
dc.contributor.secondreaderBuskirk, Fred R.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentPhysics
dc.subject.authorReduced density channelen_US
dc.subject.authorFringe dataen_US
dc.subject.authorInterferogramen_US
dc.subject.authorZero Fringe Lineen_US
dc.subject.authorChannel depthen_US
dc.subject.authorReference marken_US
dc.subject.authorChannel widthen_US
dc.subject.authorCarbon dioxide laseren_US
dc.description.serviceLieutenant Commander, United States Navyen_US
etd.thesisdegree.nameM.S. in Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplinePhysicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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