Ball State University LibrariesLibrary services and resources for knowledge buildingMasters ThesesThere is no abstract available for this thesis.

AbstractThis thesis includes an elementary introduction and background to nuclear magnetic resonance (NMR) detection. The content is essentially concerned with the mathematical analysis of the spectrometer electronics. The construction and testing was routine using established high frequency techniques. The spectrometer circuitry incorporates both vacuum tube and solid state devices. The special characteristics of each device were utilized to best meet the particular circuit requirements.The electronic portion of this spectrometer functioned properly. Final testing of the total system is awaiting the completion of the induction probe presently under development.Ball State UniversityMuncie, IN 47306

This thesis begins with a theoretical description of the quadrupole nucleus, its interaction with a molecular electric field and its detection.The design parameters for the minaturized cryogenic NQR Spectrometer are presented along with an analysis of the operation of a superregenerative oscillator-detector. A review of the problems encountered in the development of the spectrometer is also presented.Ball State UniversityMuncie, IN 47306

No description available.

The goal of this dissertation research is to develop and demonstrate a functioning snapshot imaging spectropolarimeter for the long wavelength infrared region of the electromagnetic spectrum (wavelengths from 8-12 microns). Such an optical system will be able to simultaneously measure both the spectral and polarimetric signatures of all the spatial locations/targets in a scene with just a single integration period of a camera. This will be accomplished by combining the use of computed tomographic imaging spectrometry (CTIS) and channeled spectropolarimetry. The proposed system will be the first instrument of this type specifically designed to operate in the long wavelength infrared region, as well as being the first demonstration of such a system using an uncooled infrared focal plane array. In addition to the design and construction of the proof-of-concept snapshot imaging spectropolarimeter LWIR system, the dissertation research will also focus on a variety of methods on improving CTIS system performance. These enhancements will include some newly proposed methods of system design, calibration, and reconstruction aimed at improving the speed of reconstructions allowing for the first demonstration of a CTIS system capable of computing reconstructions in 'real time.'

Recent developments in quantum information processing have presented new and interesting ways to perform advanced algorithms and improve signal to noise ratios. Examples of these include optimal control theory pulse generation algorithms and the usage of high Q-factor resonators. However, these developments are blocked by current spectrometer designs. This thesis details the design and testing of a new spectrometer with sufficient accuracy, bandwidth, and control to implement these advances. The proposed solution is to use an FPGA-based development board together with custom computer software. This gives access to high-speed analogue inputs and outputs, as well as digital output pins. The spectrometer is then used in two X-band electron spin resonance experiments, showing how the advantages of the system allow for superior results to that possible with the previous equipment. In addition, the setup is used in a Nitrogen Vacancy (NV) system where a rabi experiment is performed.

Thesis (Ph. D.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.

Thesis (Ph. D.)--University of Wisconsin, 1967. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.

This MSc. thesis deals with a research of Blanik orthogneiss and its planar and linear structural elements. The work is divided into a theoretical and practical part. The theoretical part provides an overview deformation processes in geological bodies and resulting structures. The practical part provides a structural analysis of 34 outcrops in the area of interest. Outcrops are described in terms of petrological characteristic and its geological structures, which were measured. Final data were transformed into diagrams. One sample of the blanik orthogneiss was also subjected to microstructural analysis. Twelve samples were analyzed by a portable spectrometer Delta Professional.

Neste trabalho, é apresentado o desenvolvimento de um IP de rede Ethernet com interface para o barramento Avalon para utilização em conjunto com o processador Nios II da Altera. O IPC foi adaptado do projeto Ethernet_tri_mode, e é capaz de transferir dados a velocidades de 1000, 100 e 10 Mbps. O desenvolvimento envolveu a adaptação do código para atingir os requisitos do projeto, feito segundo as diretrizes do CIERMag de manter todo o código em VHDL. Além disso, foi implementada uma interface de comunicação com o processador Nios II para tornar possível a configuração do sistema, bem como a transferência de dados através de um software sendo executado no processador. O IPC Ethernet foi projetado para ser aplicado no espectrômetro digital em desenvolvimento pelo CIERMag e teve como compromissos a baixa utilização de recursos lógicos do FPGA e, ao mesmo tempo, a disponibilização de uma alta taxa de transferência de dados para o espectrômetro. Como ferramenta de desenvolvimento, foi utilizada a plataforma Quartus II cujo fornecedor é a Altera. Já os testes em placa foram realizados em um kit de desenvolvimento DE3-150 da Terasic, o qual utiliza uma FPGA Stratix III, também da Altera. Com o intuito de testar e validar o sistema, foi desenvolvido um software para o processador Nios II capaz de receber e enviar dados através do IPC e com inteligência para responder pedidos do tipo ARP e PING. O subsistema de Gigabit Ethernet desenvolvido aqui já incorpora a versão corrente do Espectrômetro Digital de RM do CIERMag. / In this work we expose the implementation of an Ethernet network core which interfaces to Avalon bus used along with the Nios II Altera processor. This core was adapted from the Ethernet_tri_mode project. It can transfer data at rates of 1000, 100 and 10 Mbps. The development involved the adaptation of the code to fullfil the project requirements, under the policy of the CIERMag to keep the whole coding in VHDL. Furthermore was implemented an interface to communicate with the Nios II processor to enable system configuration and data transfer through a software running on the processor. The core was projected to be applied with focus on the utilization of low FPGA logical resources with the availability of a high data transfer rate. It will be used in a digital spectrometer under development at the CIERMag. The Quartus II platform, supplied by Altera was used as the development tool. The tests on board where carried out on a DE3-150 development kit from Terasic, which has an FPGA Stratix III also from Altera. In order to test and validate the system, a software for the Nios II processor was developed, able to send and receive data via IPC and with intelligence to answer ARP and PING types requests. The developed Gigabit Ethernet subsystem is now part of the running version of the CIERMag Digital MR Spectrometer.