Physical Sciences and Mathematics Commons^™

Confinement Of Electron Orbits And The Interaction Between The Electron Beam And Cavity Modes In The Orbitron Maser, Wlodzimierz Nakonieczny

Doctoral Dissertations

The Orbitron maser, developed over recent years in the University of Tennessee Plasma Laboratory, is an alternative microwave source, capable of producing microwave radiation up to the submillimeter range. It operates on the basis of interaction between an electrostatically confined electron cloud and electromagnetic field in the Orbitron resonator. Good confinement of the cloud is very important for an efficient operation of the Orbitron, and is directly related to the shape of electron orbits in the device. It appears that the radial confinement can be determined by two simple criteria concerning the electron's angular momentum L and energy E. The …

Fluvial, Tidal And Storm Sedimentation In The Chilhowee Group (Lower Cambrian), Northeastern Tennessee, Mary R. Cudzil

Masters Theses

The Lower Cambrian Chilhowee Group of northeastern Tennessee consists of the Unicoi, Hampton and Erwin Formations and is divided into four facies. Facies G occurs only within the lower 200 m of measured section (the Unicoi Formation) and consists of fine-grained to pebbly quartz wacke with rare thin beds of laminated siltstone. Subfacies Gh consist of low-angle to horizontally laminated, fine-grained sandstone with laminae and lenses of granules and pebbles. Subfacies Gh represents upper flow-regime, overbank deposition within a braided stream system that was proximal to a coastline. Subfacies Gmr consists of medium-scale, planar-tabular cross-stratified conglomerate in which megaripple bedforms …

Late-Quaternary Vegetational History At Jackson Pond Larue County, Kentucky, Gary R. Wilkins

Masters Theses

A 6.2 meter core of lacustrine sediment from Jackson Pond, Larue County, Kentucky represents the first continuous sequence from Kentucky permitting the vegetational reconstruction for the full-glacial through late-Holocene intervals. Jackson Pond is a spring-fed pond situated within a karst-collapse basin underlain by Ste. Genevieve and St. Louis limestone of Mississippian age. The site is located at 37°27'N, 85°30'W, 190 km south of the full-glacial limit of the Laurentide Ice Sheet. Six sediment samples submitted for radiocarbon analysis provide an absolute chronology for the site for the last 20,460 years.

From 20,460 yr B.P. to 20,330 …