Theses and Dissertations at Montana State University (MSU)
Permanent URI for this collectionhttps://scholarworks.montana.edu/handle/1/733
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Item Hyper-spectral microscope: auto-focusing(Montana State University - Bozeman, College of Engineering, 2018) Lozano, Kora Michelle; Chairperson, Graduate Committee: Ross K. SniderThis thesis is part of a larger project to develop a hyper-spectral microscope, to be used to find the optimal growing conditions for human inducible pluripotent stem cells. The hyper-spectral microscope is being developed by the Department of Chemistry and Biochemistry at Montana State University (MSU). Specifically, the hyper-spectral microscope is being developed to aide in live cell imaging, reduce cell stress from laser excitation, increase the number of markers possible at once, and keep costs down compared to non-hyper-spectral set-ups of similar capability. To the knowledge of those involved in this project it is the first of its kind. The scope of this thesis centers on implementing an auto-focusing algorithm for the hyper-spectral imager.Item Design, fabrication, and implementation of the energetic particle integrating space environment monitor instrument(Montana State University - Bozeman, College of Engineering, 2014) Gunderson, Adam Kristopher; Chairperson, Graduate Committee: Brock LaMeresThe ability to simultaneously monitor spatial and temporal variations in penetrating radiation above the atmosphere is important for understanding both the near Earth radiation environment and as input for developing more accurate space weather models. These models currently lack high resolution multi-point measurements to accurately portray the spatial and temporal variability of the radiation belts. To obtain data that may uncover the small-scale spatio-temporal variability of the areas around the planet known as the Van Allen Radiation Belts measurements must be made across a distributed array of satellites. The most recent decadal survey on solar and space physics states that the CubeSat platform is ideal for making these type of measurements [43]. The Energetic Particle Integrating Space Environment monitor instrument (EPISEM) will launch aboard eight CubeSat's as a part of the Edison Demonstration of Smallsat Networks (EDSN) mission. By being distributed across a geographically dispersed area, EPISEM will help fill the data gap by measuring the location and intensity of energetic charged particles simultaneously. This research describes the fabrication approach of the miniaturized radiation detection instrument aboard the EPISEM instrument and operational considerations unique to missions using many identical spacecraft and instruments. The EPISEM payload was specifically designed for CubeSats; leveraging heritage from the payload operating aboard Montana State University's Hiscock Radiation Belt Explorer (HRBE), launched in October 2011. The EDSN project is based at NASAs Ames Research Center, Moffett Field, California, and is funded by the Small Spacecraft Technology Program (SSTP) in NASAs Office of the Chief Technologist (OCT) at NASA Headquarters, Washington. The EDSN satellites are planned to fly late 2014 as secondary payloads on a DoD Operationally Responsive Space (ORS) mission that will launch into space from Kauai, Hawaii on a Super Strypi launch vehicle. The EPISEM payload was designed, built, tested, and delivered to NASA Ames by the Space Science and Engineering Laboratory at Montana State University.Item A new DC-DC converter for fuel cell powered residential power generation systems(Montana State University - Bozeman, College of Engineering, 2006) Sharma, Rahul Rajiv; Chairperson, Graduate Committee: Hongwei GaoThis thesis presents a new topology for an isolated DC-DC converter for low voltage to high voltage conversions at high power. The proposed converter is targeted for use in fuel cell powered residential power generation systems, where low voltage to high voltage conversion at high power (>5KW) and isolation between input and output are required. Conventional DC-DC converters like forward, half bridge and full bridge for such applications need to have high turn ratio in their power transformers, to enable the high voltage boosting. This high turns ratio of the transformers results in high leakage inductance which reduces the converter's efficiency and increases the difficulty in control. The proposed converter overcomes this problem by utilizing the leakage inductance for energy conversion instead of considering it as a parasite. This reduces the problems of low efficiency and difficulty of control, caused by the leakage inductance.