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dc.creatorChen, Xupeng
dc.date.available2011-02-19T00:21:08Z
dc.date.issued2003-12
dc.identifier.urihttp://hdl.handle.net/2346/21459en_US
dc.description.abstractIn this dissertation, three topics are investigated in different degrees: space-charged limited current for a vacuum cylindrical diode, microwave resonance effects in coaxial diodes and microwave propagating mode identification. By introducing a physics approximation method into analyzing the nonlinear Poisson's equation, an analytical expression for the space-charge-limited current density for a one-dimensional (1-D) cylindrical diode has been investigated and developed. Applying the approximation method, we get the relativistic theory corrected current for 1-D cylindrical diodes. This 1-D result is extended to 2-D. Some experiments at TTU show that the interaction between the virtual cathode oscillation and the cavity is a key to determine the microwave frequency and propagating mode. Particularly, we observe that the E-beam plays an important role in cavity formation. Some possible explanations are proposed. The methods to determine microwave propagating modes are reviewed and some suggestions are proposed to identify microwave propagating modes.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherTexas Tech Universityen_US
dc.subjectCathode ray oscillographsen_US
dc.subjectMicrowavesen_US
dc.subjectVirtual computer systemsen_US
dc.subjectPoisson's equationen_US
dc.subjectCavity resonators -- Evaluationen_US
dc.titleInvestigation of a high-power virtual cathode oscillator
dc.typeDissertation
thesis.degree.namePh.D.
thesis.degree.levelDoctoral
thesis.degree.disciplinePhysics
thesis.degree.grantorTexas Tech University
thesis.degree.departmentPhysics
dc.degree.departmentPhysicsen_US
dc.rights.availabilityUnrestricted.


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