Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Z57: General Physics |
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Sponsoring Units: APS Room: Room 303 |
Friday, March 10, 2023 11:30AM - 11:42AM |
Z57.00001: From the cosmos to the capitol: Why (and how) to run for office Sarah Smaga, Shaughnessy Naughton Some of the biggest challenges facing our communities are technologically complex - from cybersecurity and climate change to decisions about infrastructure and economic development. Physicists bring unique insights to these discussions, contributing technical expertise and rigorous evaluation of data and evidence. This valuable perspective is clearly articulated in APS Statement 15.1: Statement on Civic Engagement. Several physicists have even brought their skills to the United States Congress including former Representatives Bill Foster and Rush Holt. But elected office is still not commonly discussed as a career path in academic or professional circles. |
Friday, March 10, 2023 11:42AM - 11:54AM |
Z57.00002: Observation of monoenergetic electrons from two-pulse ionization injection in quasilinear laser-wakefields. Marko W von der Leyen, J. Holloway, Yong Ma, Paul T Campbell, Ramy Aboushelbaya, Qian Qian, Andre F Antoine, Mario Balcazar, Jason A Cardarelli, Qingsong Feng, Rebecca J Fitzgarrald, Bixue Hou, Galina Kalinchenko, Joshua Latham, Anatoly M Maksimchuk, John Nees, Iustin Ouatu, Robert W Paddock, Ben T Spiers, Alexander G Thomas, Robin Timmis, Karl M Krushelnick, Peter A Norreys The generation of low emittance electron beams from laser-driven wakefields is crucial for the development of compact X-ray sources. Here, we show new results for the injection and acceleration of quasi-monoenergetic electron beams in low amplitude wakefields, both experimentally and using simulations. This is achieved by using two laser pulses which decouples the wakefield generation from the electron trapping via ionization injection in addition with temporally limited constructive interference of the driven wakefields. By changing the polarization of the injector pulse, reducing the ionization volume, the electron spectra of the accelerated electron bunches are improved. |
Friday, March 10, 2023 11:54AM - 12:06PM |
Z57.00003: Observation of Fundamental Spatial Limits of Light Localization Farbod Shafiei, Massoud Ramezani Masir, Tommaso Orzali, Alexey Vert, Man Hoi Wong, Gennadi Bersuker, Michael C Downer Disordered media such as photonic lattices and micro/nano-structures, bring light to localization in the spaces between the scattering sites that averages an optical mean free path. We have used scanning probe microscopy (with ~ 20 nm optical resolution) to collect localized light in the gaps between crystallographic defect scattering sites in III-V films with variety of defects densities. However, no localized light spot smaller than ~ 50 nm (corresponding to the mean free path smaller than ~14.5 nm) is observed in a large statistical distribution (observation at λ~390 nm). Experiment and simulation results to the first direct observation lowest spatial limit for optical Anderson localization at corresponding mean free path of ~13 nm for 390 nm wavelength. |
Friday, March 10, 2023 12:06PM - 12:18PM |
Z57.00004: A Newtonian Alternative To Special Relativity Eric A Samuel We show that the special theory of relativity (SR) is fundamentally inviable because its: (i) postulates are traceable to Newton’s Corollary V, in which time and mass invariance are implicit, (ii) experimental design of observer and apparatus in separate frames is non-inertial, and (iii) time dilation formulation is ambiguous for rotations and clock types; replacing the light clock with a sonar clock leads to an unlikely upper speed limit and an alternate set of time dilations. |
Friday, March 10, 2023 12:18PM - 12:30PM |
Z57.00005: On Geometry and Physics Aspects of The Generalized Newton's Laws Triplet (G, h, kB) Zhi an Luan The Generalized Newton's Laws triplet (G, h, kB) is constructed by three monodromy varieties: (1). Newton's gravity constant monodromy G=2/3 =0.666 666 666...(CODATA value G= 6.674 30× 10-11 m3 kg-1s-2), (2). Planck reduced constant h =2π√3 = 1.08827961854×10 .... (CODATAvalue h= 1.054571817... ×10-34 J.m), (3). Boltzmann constant kB = 8√3 = 1.38564064606×10 ... (CODATA value kB = 1.380649 × 10-23 J K-1). It is naturely that the triplet (G, h, kB) is invariant monodromy variety and has a deep geometry and physics meanings. |
Friday, March 10, 2023 12:30PM - 12:42PM |
Z57.00006: Electrically conductive micropaths made from assembled 1D particle structure: novel method of fabrication, and micropath characterization Yaroslav Harkavyi Assembly of single-particle thick one-dimensional microstructures on substrates is desired for performing different fundamental studies, and holds promise for a variety of practical applications. This includes electronic applications, i.e., formation of highly conductive electrical paths. There are many approaches for fabrication of such structures, but they are expensive, time-consuming, or inefficient, requiring access to advanced tools and laboratories. Moreover, they are not suitable for fabricating microstructures with programmable shapes, arbitrary lengths, and positioning. Here we report a method that overcomes these limitations and facilitates the continuous production of particle paths outside bulk liquid on various substrate materials and morphologies, using a variety of particle materials with wide size range. The method is simple yet robust and easy to implement, and is straightforwardly scalable, involving a synergetic action of electric-field assembly, capillary and electrostatic interactions [1]. Using our developed method, we fabricated micropaths of different widths, height-to-width ratio, and the magnitude of electrical conductivity. The obtained results from impedance studies are showing big potential in their future applications and are in good agreement with theoretical calculations. |
Friday, March 10, 2023 12:42PM - 12:54PM |
Z57.00007: Singular Locally Propagating Azimuthal Electromagnetic Fields Mustafa S Bakr, Smain Amari
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Friday, March 10, 2023 12:54PM - 1:06PM |
Z57.00008: "The MeoPian Experiment" Dwight A.K.A. Contrare' L Gaul Question: What is the Source, Nature and Purpose of Humanistic Consciousness? |
Friday, March 10, 2023 1:06PM - 1:18PM |
Z57.00009: Model for Internal Characteristics of EM Wave Applied to Double Slit and Hydrogen Orbital Martin Alpert A model for EM waves is presented based on the internal characteristics of the wave. Wave frequency is modeled as sinusoidally changing discrete increments for a total number of Planck states in a given EM energy. Each increment consists of a different number of Planck states, theorized to be the minimal energyXtime fundamental increment of change. The model provides insight into the characteristics of EM energy. As frequency increases, a larger number of Planck state and increment changes result in what is externally observed as a higher energy. This model is applied to double slit systems where the observed probability distribution is due to all possible binary interactions (Born’s rule) between the number of Planck states in each wave increment. Possibilities are limited by the possible slit-environmental interactions in a system where each possibility is considered one bit of information, a Boltzmann state. A 3-D model for interference is applied to the probability distribution for the electron location relative to the nucleus. |
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