Bulletin of the American Physical Society
Spring 2015 Joint Meeting of the Texas Section of the AAPT, Texas Section of the APS and Zone 13 of the Society of Physics Students
Volume 60, Number 2
Thursday–Saturday, March 5–7, 2015; Baytown, Texas
Session D3: Society of Physics Students |
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Chair: Tim Head, Abilene Christian University Room: Student Center Edythe Old Studio |
Friday, March 6, 2015 2:00PM - 2:12PM |
D3.00001: Propagation Velocity in High Temperature Media Martin Rangel, Alexander Bratvedt, Samina Masood Elements of the propagation velocity in high temperature media are modeled utilizing thermally dependent functions for the permeability and permittivity of the medium. Two general solutions are formulated giving constraints of both electric and magnetic conditions of the medium as well as a form that isolates each of the thermally dependent functions. In order to validate a more elaborate model of the medium the solutions for propagation velocity and first order corrections to one-loop vacuum polarization are calculated and compared to known values. Reformulation also produces a plasma frequency which can be produced using the thermally dependent functions. Future work will include higher order corrections and computer modeling to further construct an efficient model for conditions present in the early universe. This construct will then be adjusted for chemical potential terms and other higher density factors in order to more successfully model vacuum, electron, and neutrino interactions in hot and dense media such as those found in neutron stars. [Preview Abstract] |
Friday, March 6, 2015 2:12PM - 2:24PM |
D3.00002: Mangetohydrodynamics and Binary Protostar Twins Aaron Herridge, Samina Masood Binary star systems are an interesting case study in astrophysics. These stellar arrangements offer a continuously evolving multiple-body system for those who study astronomy to explore as a model of the fate and origin of the stars. However, binary star systems are themselves a diverse phenomenon. Types of binary star systems range from red giant / white dwarf systems, supermassive giant / neutron star systems, black hole / supermassive giant systems, protostar pair systems, and binary protostar twin systems. This study focuses on the case of binary protostar twins, a specific model of binary protostars that involves identical binary stars that formed as binary stars rather than being drawn together by gravitational capture. The existence of binary protostar twins will be weighed against the evidence, and the models of formation will be detailed, with a particular emphasis on hydrodynamics in accretion disk fragmentation. The research lends strength to the concept that magneto-hydrodynamics offer an explanation for the disk fragmentation that is modeled as a formation approach to binary protostar twins. Furthermore, this study examines several categories of binary protostar sets, including ``identical twin'' binary protostars, ``fraternal twin'' binary protostars, and ``sibling'' binary protostars. [Preview Abstract] |
Friday, March 6, 2015 2:24PM - 2:36PM |
D3.00003: Analysis of Reaction Rates for Chemiluminescence Peter Goodwin, Adrianna Campuzano, Alicia Medina, Britney Wallace, Jim Sizemore Common dollar store glow sticks produce illumination through chemiluminescence. Desiring to explore the nature of the chemical reaction, we measured the illumination intensity versus time at three different temperatures. Four different colors: orange, green, blue, and pink were measured and fitted to an exponential model. Using Matlab we fitted our experimental data to this model to derive best fit parameters. We compared our actual data to the model to determine goodness of fit and random errors. We will comment on the chemical insights we gained through this experiment. [Preview Abstract] |
Friday, March 6, 2015 2:36PM - 2:48PM |
D3.00004: The Structure, Assembly and Optimization Test of a Small Gas Electron Multiplier (GEM) Detector for Medical Radiotracers Yvonne Ng, Joshua Medford, Jaehoon Yu, Andrew White, Mingwu Jin High energy physics research produces advanced hardware that is capable of precise readout, and many of these technologies have spun off applications in other fields like medical physics, telecommunications and national defense. The advanced detector team and medical physics group in University of Texas at Arlington recently started collaborating on a project that would enable detection and imaging of occult peritoneal cancer tumors using the Gas Electron Multiplier (GEM) hadron calorimeter technology. GEM is a technology that utilizes the avalanche effect of charged particles in high electric field to magnify hadron signals produced in collision for precise and accurate energy interpretation in high energy physics experiments. This technology can be effectively applied on detection of peritoneal cancer cells bound with radiotracers labeled with Cu-64 and F-18. In this study, we assembled a prototype 2cmx2cm single channel GEM detector and optimize the running conditions of the GEM chamber, such as air pressure, operating high voltage and their effect to the detector's gain. Detailed structural and testing results for each part of the hardware assembly will also be shown. This study will lay a foundation for the next stage of development of a multichannel detector with high spatial resolution imaging and ultimately lead to a low cost, fast response, and portable imaging device for the treatment of peritoneal cancer. [Preview Abstract] |
Friday, March 6, 2015 2:48PM - 3:00PM |
D3.00005: Synthesis of CuInSe$_{2}$ thin films from electrodeposited aqueous solution on graphene sheets Zachary Williams, Humberto Monsivais The main objective of this research project was the production of a photovoltaic cell by synthesizing a thin film of CuInSe$_{2}$ on a graphene sheet by electrochemical deposition. Copper indium selenide is a promising candidate for thin-film photovoltaic applications due to its formidable semi-conductor characteristics. Graphene has been proven to have the best electrical conductivity of any other metal. CIS films were synthesized through electrochemical deposition from an aqueous solution. The aqueous electrolytic solution of 100 mL was prepared using these molarities: 1 mM of CuCl$_{2}$, 10 mN of InCl$_{3}$, 5 mM of SeO$_{2}$, and 25 mA of Na-citrate-dihydrate (Na$_{3}$C$_{5}$O$_{7})$ which acted as the complexing agent. Subsequently, the films were annealed for 5 minutes at 650 $^{\circ}$C using a tube furnace. Ultimately, EDS analysis was conducted to analyze the chemical characterization of the sample after annealing. [Preview Abstract] |
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