The Search For Slow Particles And Magnetic Monopoles With Nova,
2025
University of South Alabama
The Search For Slow Particles And Magnetic Monopoles With Nova, John Clark
Honors Theses
Singular magnetic poles, north or south, have been theorized to exist for hundreds of years. In the modern day, the elusive singular magnetic pole still remains undiscovered. The appearance of this particle would help confirm many Grand Unified Theories, GUTs, and revolutionize our understanding of some of the fundamental forces of the universe. Fermilab's NOvA collaboration is working on ways to screen and detect magnetic monopoles and other slow-moving particles coming from outer space alongside their main mission to study neutrinos. The aim of this work is to determine and improve the Far Detector’s efficiency at identifying slow moving particles. …
Effects Of Group Delay Dispersion In Silica Glass On Non-Gaussian Laser Pulses,
2025
University of Nebraska-Lincoln
Effects Of Group Delay Dispersion In Silica Glass On Non-Gaussian Laser Pulses, Lars Pedersen
Honors Program: Senior Projects (Public)
We present an analysis of how the group delay dispersion in silica glass affects the envelope of non-Gaussian laser pulses. In particular, we examine femtosecond pulses in the ultraviolet regime with cosine squared and symmetric exponential envelope shapes. For both envelope shapes, our results show a linear or semi-linear dependence of both the maximum electric field strength and duration on the group delay dispersion when the pulse passes through the silica glass medium with a thickness between 1 μm and 10 μm. This computational analysis is done using a fast Fourier transform method.
New Mathematical Approaches To Ultra-Cold Atoms,
2025
University of Massachusetts Boston
New Mathematical Approaches To Ultra-Cold Atoms, Joanna Ruhl
Graduate Doctoral Dissertations
This dissertation addresses three main themes: cold atoms, integrability, and number theory. In this dissertation we present novel approaches to four models, each of which touches on at least two of the three themes. At the intersection of cold atoms and integrability, we present a Lagrange bracket formalism that allows for exact computation of initial quantum fluctuations of soliton breathers which previously could only be estimated numerically, and the advance in software tools developed in Python to facilitate studies of two-dimensional disc breathers. At the intersection of integrability and number theory, we present a propagator for the Newman-Moore, or triangular …
Power-Beaming: Wireless Energy Transfer Using Lasers,
2025
Arkansas Tech University
Power-Beaming: Wireless Energy Transfer Using Lasers, Spencer L. Barnett
ATU Scholars Symposium
The objective of the project is to implement a wireless energy transfer system utilizing laser technology. This system involves modulating the laser’s beam profile and spatial distribution through precise optical manipulation. The energy transmitted by the laser is captured by a photovoltaic array, commonly referred to as a solar panel, which is engineered to convert incident photons into direct current (DC) electrical power. The current challenge is to develop a reliable wireless energy transfer mechanism capable of operating over extended distances, thereby overcoming the constraints imposed by wired connections, particularly in environments where wiring is impractical, such as in space. …
Computational Analysis Of Proton Conductivity Factors In Grotthuss-Style Mechanisms,
2025
Ursinus College
Computational Analysis Of Proton Conductivity Factors In Grotthuss-Style Mechanisms, Brock Dyer
Physics and Astronomy Honors Papers
The mechanism and fundamental molecular properties involved in proton conduction are discussed. Four calculable properties are presented: the proton affinity, binding energy (between protonated and neutral forms), intramolecular tautomerization barrier, and proton hopping barrier. An overview of the computational methods used in this thesis, including an introduction to the many-body Schrödinger equation and Density Functional Theory, as well as a look at Plane-Wave Density Functional Theory and Gaussian-Type Orbital Density Functional Theory are presented. 4,5-dimethyl-[1,2,3]-triazole is used as a model system, with 10 variations being generated with varying amounts and positions of fluorine substitution on the methyl groups. Preliminary calculations …
Doppler Free Laser Spectroscopy,
2025
Fort Hays State University
Doppler Free Laser Spectroscopy, Luis F. Ayala
SACAD: Scholarly Activities
Using Doppler Free laser spectroscopy we observed ground state and excited state Hyperfine structure of Rb atoms Isotopes 85 and 87.
Are The Vibrational Modes Of Molecules Quantized,
2025
Fort Hays State University
Are The Vibrational Modes Of Molecules Quantized, Aniol Majoral Obradors
SACAD: Scholarly Activities
In electron scattering from N2 molecules we observe quantized vibrational levels of N2-. These vibrational levels are well suited for energy calibration when electron transmission of unknown molecules is performed.
Vorticies In The Nonlinear Optical Fluid,
2025
University of Denver
Vorticies In The Nonlinear Optical Fluid, Patrick C. Ford
Electronic Theses and Dissertations
In this dissertation, we review the dynamics of the propagation of a laser through a nonlinear medium, and the dynamics of a self-interacting superfluid phase, and show a mathematical analogy between them. We identify an equivalence that allows direct comparison of the properties and dynamics of the optical fluid with those of the Bose-Einstein condensate. Next, we describe some experimental techniques and methods for data capture and analysis on the way to presenting a novel experimental apparatus that has allowed us to study non-equilibrium nonlinear vortex dynamics in the optical fluid, and that will allow more general future studies of …
How Does Honey Make Gold Nanoparticles? Optical Analysis Of The Effects Of Temperature And Composition,
2025
Belmont University
How Does Honey Make Gold Nanoparticles? Optical Analysis Of The Effects Of Temperature And Composition, Lydia Alvarnaz, Davon Ferrara Phd
SPARK Symposium Presentations
In recent years, with an increasing interest in green chemistry, there has been an effort to find and understand synthesis methods using biologically-produced reducing and capping agents to produce stable gold nanoparticles (GNPs). Previous research using honey has shown this substance is a viable reducing agent in the formation of nanoparticles but have not looked at the stability of the colloidal gold nanoparticles. In this work, gold nanoparticles were reduced from an aqueous solution of gold chloroauric acid and a solution of varying concentrations of honey and water. The formation of NPs was analyzed using UV-Visible transmission spectroscopy to confirm …
On Static Equilibrium State Of An Electron-Positron Pair Interacting By Electrostatic And Magnetic Forces,
2025
Suffolk University
On Static Equilibrium State Of An Electron-Positron Pair Interacting By Electrostatic And Magnetic Forces, Polievkt Perov, Natasha Perova-Mello
College of Arts & Sciences Faculty Works
An electron-positron pair can be in static equilibrium where the magnetic torque is zero and the attractive Coulomb’s force between unlike charges and the repelling force between the spin magnetic moments of these two particles balance each other out. An electron-positron pair near the equilibrium position can be modeled as an oscillator consisting of two masses on a spring. The calculations of the equilibrium distance, the effective “electromagnetic spring constant”, and the frequency of oscillations of an electron-positron pair near the equilibrium are presented. The calculations might be useful for the students in their studies of electricity, magnetism, and particle …
Numerical Studies Of Semiclassical Light Storage Using The Coherent Atomic Transfer Function,
2025
Air Force Institute of Technology
Numerical Studies Of Semiclassical Light Storage Using The Coherent Atomic Transfer Function, Zachary T. Johnson
Theses and Dissertations
Quantum communication through photons relies on photonic storage to preserve quantum states. However, when photons interact with matter, quantum information becomes distorted. A recently developed semi-classical analytical model predicts output light pulses from an electromagnetically induced transparency (EIT) system. Using the predictions, the model known as the Coherent Atomic Transfer (CAT) Function, is capable of predicting the stored pulse or reconstructing the original pulse. Using numerical convolution and deconvolution with the CAT function as an analog of the point spread function of Fourier optics can provide insights on the effects of EIT storage on the retrieved pulse. Blind deconvolution is …
Transfer Efficiencies Of Surface-To-Surface Transport Of Micron-Sized Actinide Surrogate Particles,
2025
Air Force Institute of Technology
Transfer Efficiencies Of Surface-To-Surface Transport Of Micron-Sized Actinide Surrogate Particles, Austin R. Powell
Theses and Dissertations
Particle effluent of varying sizes is released during routine activities within laboratory environments and these particles can come in contact with a wide range of surfaces. Particles of micron size or smaller can be especially pervasive and can transfer between multiple subsequent surfaces, leading to the progressive contamination of a laboratory. Understanding the transport dynamics of micron sized particles will help inform facility personnel of the possibility of contamination by these potentially hazardous materials of interest. In this research, the transfer efficiency of micron sized surrogate actinide particles (Europium-doped Gadolinium Oxysulfide (EGOS)) is measured for multiple materials, between two particle …
Implications Of Magnetic Evolution On Coronal Loop Thermal Variation Prior To Solar Flares,
2025
Air Force Instittue of Technology
Implications Of Magnetic Evolution On Coronal Loop Thermal Variation Prior To Solar Flares, Kara L. Kniezewski
Theses and Dissertations
Solar flares are intense bursts of electromagnetic radiation, which occur due to a rapid destabilization and reconnection of the magnetic field. While flares are a magnetic phenomena, very little attention has been paid to thermal conditions in the corona prior to flare onset. This study serves as a follow-on to Kniezewski et al., 2024, where the EUV emission from coronal loops was observed to vary substantially and without any coherence between channels before 53 off-limb flares. These variations suggest multiple mechanisms within the coronal magnetic field are responsible for heating fluctuations. Here, the 3D magnetic field is modeled using a …
On The Exploration Of Crystallographic Anisotropy And Defects In Shock Loading Using Molecular Dynamics,
2025
Air Force Institute of Technology
On The Exploration Of Crystallographic Anisotropy And Defects In Shock Loading Using Molecular Dynamics, Benjamin P. Helman
Theses and Dissertations
The impact of crystallographic orientation, grain boundaries, and vacancies on the shock behavior of aluminum was investigated using molecular dynamics simulations. Shock loading in the [001], [011], and [111] directions was explored, revealing anisotropic behavior in shock speed, melting, dislocation density, and unique phase changes. The Hugoniot elastic limit in the [100], [110], and [111] directions was calculated as 23.2 GPa, 24 GPa, and 18.4 GPa respectively. These results were found to be an order of magnitude larger than the compressive yield strength computed at equilibrium. Additionally, metastable melting in the [011] and [111] directions occurred roughly 1000 K below …
Material Classification With Spectropolarimetric Lidar,
2025
Air Force Institute of Technology
Material Classification With Spectropolarimetric Lidar, Alexander J. Watson
Theses and Dissertations
A method for characterizing unknown targets using a hyperspectral polarimetric light detection and ranging (LiDAR) system is presented. Light reflected from manmade objects tends to be more polarized than light reflected from objects in the natural world. As such, polarization measurements can be used in remote sensing applications to differentiate artificial and natural objects. Previous works have attempted to characterize objects through passive polarimetric imagery. Methods developed by Cain and Lemaster and Cunningham facilitate reconstruction of the Stokes Vector from returning light. Martin used multispectral polarimetry to classify targets when the angle of incidence (AOI) is close to 0º. Here, …
Isotopic Analysis Of Lithium Hydroxide Monohydrate Using Laser-Induced Breakdown Self-Reversal Isotopic Spectrometry (Libris) And Machine Learning,
2025
Air Force Institute of Technology
Isotopic Analysis Of Lithium Hydroxide Monohydrate Using Laser-Induced Breakdown Self-Reversal Isotopic Spectrometry (Libris) And Machine Learning, Madison R. Moran
Theses and Dissertations
High-resolution Laser-Induced Breakdown Self-Reversal Isotopic Spectrometry (LIBRIS) is implemented to record the 15.8 pm Li I 670.8 nm isotopic shift in LiOH · H2O samples of varying 6, 7Li abundance. A simple univariate linear regression demonstrates an acquired isotopic shift of 13.813 ± 1.21 pm in samples varying from 3 to 95 6Li at%. Supervised machine learning regressions are trained on self-reversal wavelength locations in order to quantify 6Li abundance. A stacked ensemble using two base learners yields the superlative characterization of 6Li abundance with RMSE of 5.66 at% and detection limit of 18.8 at%. Using …
Convergent Close-Coupling Approach To Electron Impact Dissociation Of The Polyatomic Molecule H 3 + And Its Isotopologues,
2025
Curtin University of Technology
Convergent Close-Coupling Approach To Electron Impact Dissociation Of The Polyatomic Molecule H 3 + And Its Isotopologues, Reese K. Horton, Michael V. Pak, Igor Bray, Dmitry V. Fursa
Faculty Publications
Cross sections for electron impact dissociative excitation and ionization in scattering on vibrationally excited levels of the ground electronic state of H3+ and its isotopologues are reported in the energy range of 8 to 1000 eV. Calculations have been performed using a newly developed version of the molecular convergent close-coupling code. Cross sections for total dissociative excitation, ionization yielding atomic fragments such as D+, and the total inelastic cross section are presented. Good agreement with available experiments has been demonstrated.
Convergent Close-Coupling Approach To Electron Scattering On H3+ : Scattering Dynamics And Dissociative Processes,
2025
Curtin University of Technology
Convergent Close-Coupling Approach To Electron Scattering On H3+ : Scattering Dynamics And Dissociative Processes, Reese K. Horton, Michael V. Pak, Igor Bray, Dmitry V. Fursa
Faculty Publications
Cross sections for electron impact dissociative excitation and ionization in scattering on vibrationally excited levels of the ground electronic state of H3+, D3+, and T3+ are reported in the energy range of 8–1000 eV. Calculations have been performed using a newly developed version of the molecular convergent close-coupling code. Convergence of the cross sections with the size of the projectile partial-wave and close-coupling expansions is examined. Branching ratios and cross sections for the yields of D2+ and D+ from dissociative excitation of D3+ are presented and isotope …
Design And Construction Of An Affordable Adjustable Repetition Rate Optical Frequency Comb,
2025
Connecticut College
Design And Construction Of An Affordable Adjustable Repetition Rate Optical Frequency Comb, Christopher Latchford
Physics, Astronomy and Geophysics Honors Papers
Two different adjustable repetition rate optical frequency combs were designed and constructed with off-the-shelf components, including several improvements to established erbium fiber designs. These designs were assembled at a fraction of the cost of a commercial comb. Both combs were constructed with a repetition rate of roughly 100 MHz, with one combs tuning range being 2 MHz and the others being 3 MHz. These combs followed different designs, the first being a modification of an established nonlinear polarization rotation (NPR) design, the second being a modification to a “figure 9” design. A stabilization control loop for frep achieved long-term drifts …
Quantum-Mechanical Definition Of The Classical Scalar Potential In Schrödinger-Pauli And Schrödinger Theory,
2025
CUNY Brooklyn College
Quantum-Mechanical Definition Of The Classical Scalar Potential In Schrödinger-Pauli And Schrödinger Theory, Viraht Sahni
Publications and Research
According to the Bohr correspondence principle, the external temporal scalar potential in the classical equation of motion is replicated in quantum theory as a multiplicative operator. An equivalent quantum-mechanical definition of the scalar potential in Schrödinger-Pauli/Schrödinger theory is provided. The potential is a known universal functional of the wave function. At each instant of time, it is the work done in a conservative “classical” field representative of internal properties of the system: Pauli and Coulomb correlations, kinetic effects, the density, the Lorentz force, an internal magnetic component, and the current density response. The Hamiltonians are thus rewritten in a …
