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Full-Text Articles in Physical Sciences and Mathematics
Gain Of A Single Gas Electron Multiplier, Mythra Varun Nemallapudi
Gain Of A Single Gas Electron Multiplier, Mythra Varun Nemallapudi
Graduate Theses and Dissertations
Gas Electron Multiplier (GEM) is a gaseous detector used in particle detection and is
known for its high rate capability. Ever since its invention in 1997, GEM was applied in
many areas and recently has been proposed to be installed in the CMS high η regions for
upgrade at LHC, CERN. A complete understanding of the working and gain behaviour does
not exist. GEM gain is influenced by charging up and this has been variedly interpreted
in literature lacking consensus. I have attempted in this work through simulations and
measurements to achieve a better understanding of single GEM gain and …
Development Of A Pyrotechnic Shock Simulation Apparatus For Spacecraft Applications, Joseph Binder, Matthew Mccarty, Chris Rasmussen
Development Of A Pyrotechnic Shock Simulation Apparatus For Spacecraft Applications, Joseph Binder, Matthew Mccarty, Chris Rasmussen
Aerospace Engineering
This report details the research, design, construction, and testing of a pyrotechnic shock simulation apparatus for spacecraft applications. The apparatus was developed to be used in the Space Environments Lab at California Polytechnic State University. It will be used for testing spacecraft components with dimensions up to 24”x12”x12” as well as CubeSats. Additionally, it may be used as an instructional or demonstrational tool in the Aerospace Department’s space environments course. The apparatus functions by way of mechanical impact of an approximately 20 lb stainless steel swinging hammer. Tests were performed to verify the simulator’s functionality. Suggestions for improvement and further …
Point-Spread Function Assessment Of Sg-Dbr Based Swept Source For Oct Imaging, David Wilkey Gilbert
Point-Spread Function Assessment Of Sg-Dbr Based Swept Source For Oct Imaging, David Wilkey Gilbert
Master's Theses
Swept Source Optical Coherence Tomography (SS-OCT) is a medical imaging technique that requires high repetition rate, widely-tunable coherent laser sources. Sampled grating distributed Bragg reflector (SG-DBR) lasers are proven in telecom applications and are expected to fulfill the requirements for SS-OCT at a significantly lower cost than alternative solutions.
Constructed entirely on a semiconductor substrate, SG-DBR lasers require four synchronized waveforms to modulate the output wavelength and intensity. Because of this unique tuning mechanism, there are a number of systematic and noise sources that can affect the quality of the OCT point-spread function (PSF). Based on these noise sources, software …
Simulation And Phases Of Macroscopic Particles In Vortex Flow, Heath Eric Rice
Simulation And Phases Of Macroscopic Particles In Vortex Flow, Heath Eric Rice
Electronic Theses and Dissertations
Granular materials are an interesting class of media in that they exhibit many disparate characteristics depending on conditions. The same set of particles may behave like a solid, liquid, gas, something in-between, or something completely unique depending on the conditions. Practically speaking, granular materials are used in many aspects of manufacturing, therefore any new information gleaned about them may help refine these techniques. For example, learning of a possible instability may help avoid it in practical application, saving machinery, money, and even personnel. To that end, we intend to simulate a granular medium under tornado-like vortex airflow by varying particle …