Bulletin of the American Physical Society
New England Section Fall 2022 Meeting
Volume 67, Number 13
Friday–Saturday, October 14–15, 2022; University of New Hampshire, Durham, NH
Session D01: Poster Session |
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Room: University of New Hampshire in Durham Three Chimney Inn |
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D01.00001: Topological Hall effect in topologically trivial target skyrmions Tan Dao, Sergey S Pershoguba, Jiadong Zang Electrons moving through a noncoplanar magnetic order acquire a Berry phase effect akin to an effective magnetic field. This effect is also known as the topological Hall effect and has been observed in topological spin texture. Here starting from a classical picture, we showed that a target skyrmion, whose topological charge is zero, has a non-zero transverse current. We then evaluated the Hall angle using the Landauer-Buttiker formalism for various target skyrmion radii. We found non-monotonic Hall angles dependent on the Fermi energy and target skyrmion's radius. Finally, we show the results still respect the adiabatic approximation. It indicates the effect comes from the real-space topology of the spin texture. |
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D01.00002: MagNet: machine learning enhanced three-dimensional magnetic reconstruction Yibo Zhang Three-dimensional (3D) magnetic reconstruction is vital to the study of novel magnetic materials for 3D spintronics. Vector field electron tomography (VFET) is an important tool to achieve that, but it is challenging due to the missing wedge problem. Conventional analytical algorithms are no longer applicable. On the other hand, model based iterative algorithms require prior knowledge and are expensive in run-time to give satisfactory reconstruction results for each individual sample. In this article, we demonstrate a data-driven U-shaped neural network enhanced VFET algorithm that can give improved reconstructed magnetic induction fields with missing wedge data. |
Author not Attending |
D01.00003: rGO/NiFe2O4 and NiFe2O4 Based Electrodes for Supercapacitors Vanya Jain As the movement toward sustainability has ensued, supercapacitors have been at the forefront concerning physical charge storage. Supercapacitors have a higher power, energy density, and longer life as compared to regular capacitors. This paper synthesized and characterized NiFe2O4 and rGO/NiFe2O4 under Prof. Peter Lemaire and Dr. Rahul Singhal. NiFe2O4 was synthesized via the co-precipitation method using Iron (II) chloride, Nickel (II) chloride, and sodium hydroxide as precursor materials. The rGO/NiFe2O4 was synthesized in a similar fashion except for adding reduced graphene oxide to the solution. The thermal characterization of the synthesized materials was carried out using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The slurry of the synthesized materials was prepared by mixing synthesized materials, carbon black, and PVDF binder in a ratio of 80:10:10, using N-methyl pyrrolidone as a solvent. The slurry was then coated onto precleaned Ni mesh and dried overnight. The electrochemical characterization was carried out in 1M Na2SO4 solution using a fabricated electrode, platinum wire, and Ag/AgCl electrode as working, counter, and reference electrodes. The physical and electrochemical results will be presented in detail at the conference. |
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D01.00004: Study of Electric Donors and Electric Acceptors in Photoactive Layers Using Computational Simulations Richard Kyung, Minseo Kang Computational simulations of molecules used in active layers in photovoltaic cells have shown substantial promise in the design of those cells. |
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D01.00005: Study of Thermal Stress and Heat Conduction in Rails Using Numerical and Computational Analysis Richard Kyung, Kyubin Moon Thermal expansion and contraction cause longitudinal stress in rails that are restricted in their longitudinal movement or confined at the ends. And this causes a potential buckle or kink due to either compression or tension forces in the rails. In this paper, considering the linear expansion of a free section of rail subjected to a temperature change, the magnitude of the thermal forces and heat conductions generated in rails were studied. During a number of calculations, the fact that the normal force exerted on the railroad decreases as the rail temperature increases were discovered. Also, the change of railroad length at a certain temperature decreases as the rail temperature increases, and the change of railroad length also decreases as the initial railroad length decreases. Lastly, the pressure exerted on a section with smaller width is bigger than that on a section with a bigger width. Thus, by using the seasonal temperature of a certain region and the weight of a certain train in these calculations, one could speculate the appropriate width of the rail. |
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D01.00006: Topological spin textures in chiral magnets: from 2D to 3D Jiadong Zang
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D01.00007: The Quantum Certainty Knowledge Theory: An Indeterminate and Determinate Theory of Quantum Interaction Donald R LaCoy The Quantum Certainty Knowledge theory presents a measurement solution focused on quantum interaction for an analyzer and an Alice and Bob experiment combining the determinacy of the Many Worlds Interpretation (MWI) with the indeterminacy of quantum entanglement/ superposition (QES). It focuses on Quantum Interaction States (QISs) which define how the quantum collapses into outcomes. The prevailing theories are either determinate or indeterminate and have focused on the observable classical outcomes, likely because that is all a classical physicist can observe. The Quantum Certainty Knowledge theory combines determinacy and indeterminacy into one solution while focusing on the QISs whose information collapses into the classical outcomes. Determinate, indeterminate, and null QISs exist for an analyzer and an Alice and Bob experiment. This thought experiment explains what is being measured and how the QIS information collapses into the historical outcomes. The Quantum Certainty Knowledge Theory explains the observations seen in the MWI, QES, and most quantum conundrums. |
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D01.00008: Physics Teacher Preparation Program at Worcester Polytechnic Institute Doug T Petkie, Rudra Kafle, Thomas Noviello The Physics Teacher Preparation Program at Worcester Polytechnic Institute (WPI) is a collaboration between the STEM Education Center and the Physics Department that leverages WPI Project Based Learning (PBL) curriculum and significant Physics Teacher Education Coalition (PhysTEC) resources. As a PhysTEC supported site, WPI has been able to implement several key components identified as effective practices at other PhysTEC sites, such as a Teacher-in-Residence to serve as a role model, a Peer Learning Assistant program that includes pedagogical training, a regional physics teacher network, and utilization of the Get the Facts Out resources to promote teaching careers. In addition to generating interest in high school physics teaching careers, an interest in Physics Education Research has also emerged. We will present an overview of our program and that allows students to complete an Initial Teaching Licensure with the BS Physics major at WPI. |
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D01.00009: Target Insert Design for Dynamic Nuclear Polarization Zoe Wolters The UNH Nuclear Physics Group (NPG) operates a dynamic nuclear polarization (DNP) lab in order to prepare samples with a high degree of nuclear spin orientation to be used in electron scattering experiments at Jefferson Lab. The current insert is optimized for spin-1 nuclei and allows for monitoring of material polarization via NMR techniques, and enhancement of tensor polarization via RF techniques. However, it has been difficult achieving vacuum among other issues, so we are designing a new target insert with improved vacuum seals, more uniform RF coils and with EPR capabilities to monitor dopant characteristics. When this insert has been constructed, I plan to create further designs for spin-1/2 materials and with further specialization in EPR and RF circuits, respectively. |
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D01.00010: Preliminary Testing of PHX050S-PC Polarization Camera for Future Use in Measuring Polarization Structure of the Solar Corona Celeste Berenbaum, Adrian Grimm, Nina Christenson, Dipankar Maitra The outermost layer of the Sun's atmosphere, otherwise known as the solar corona, is difficult to observe and study due to its relative dimness compared to the photosphere. The corona is most visible during a total solar eclipse, which is the main motivation behind designing and building the Wheaton Imaging Solar Polarimeter (WHISPER). WHISPER will measure the polarization structure of the solar corona during total solar eclipses. Central to WHISPER is the Phoenix PHX050S-PC polarization camera, equipped with a Sony IMX250/264 CMOS sensor. We will present our studies to quantify the sensor's properties such as linearity, offset, and gain parameters. We will also present polarization imaging of various targets such as the International Space Station, the Ring Nebula, and the sunlit sky. Furthermore, we are exploring the python software development kit provided by the camera manufacturer, with the goal of setting camera parameters via our own code. This code will help to fully automate continuous data acquisition during the eclipse, eliminating any gaps in data caused by manual adjustments or human error. |
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D01.00011: Analytic Evolution of Parton Distribution Functions Matthew R Markovych, Asli Tandogan Kunkel We apply an analytic method to describe the evolution of parton distribution functions (PDF). Previously, it was shown that this method successfully describes the evolution of singular distribution amplitudes in the DGLAP region. We illustrate the method by applying it to a PDF in the form of $(1-x)^3$. Our approach has advantages over the widely used numerical and analytic methods which mostly require great computational power and computational time. It is observed in our method, that calculation of one or two iterations is enough to describe the evolution of PDFs. |
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D01.00012: Discovering the True Nature of neutrinos Gh. Saleh Based on Saleh Theory the photon is the basis of the universe and every structure is made up of photons. The nature of gravitational waves and neutrinos also is the photon and their structure is based on the motion of photons. The high power of gravitational waves and neutrinos is due to their continuous and intertwined structure, which creates its high penetrating power and effectiveness. On the other hand, due to the fact that its frequency is too high and its wavelength is too short, its penetrating power is multiplied. |
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D01.00013: Photon or the Superstring Gh. Saleh Given that the genetrix of photon is the electron and the photons emit from the electrons and continue on their trajectory, in fact, the trajectory of each photon depends on the type of motion of the electron in which is transferred to photon. Electrons usually have two main motions; the first one is around the nucleus and the other one is around themselves. On the other hand, the photon also has a rotational motion around itself. When a photon emits from an electron, its motion is the resultant of these three types of motions. Photon obtains its wavelength from the motion of electron around the nucleus. The combination of the rotational motion of electron around itself and the rotational motion of photon around itself creates a zigzag-like motion in a closed ring, which can be called the internal motion of the photon. As a result, the motion of photon when leaving the electron can be divided into three motions: |
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