Bulletin of the American Physical Society
2018 Annual Meeting of the APS Four Corners Section
Volume 63, Number 16
Friday–Saturday, October 12–13, 2018; University of Utah, Salt Lake City, Utah
Session J08: Industrial and Applied Physics |
Hide Abstracts |
Chair: Ben Pratt-Ferguson, Raytheon Inc., Tuscon Room: CSC 13 |
Saturday, October 13, 2018 8:00AM - 8:36AM |
J08.00001: Joint Directed Energy Transition Office: Overview and Opportunities Invited Speaker: Matthew A Leigh In 2000, congress moved to implement the DoD Laser Master Plan to advance the state of the art, stimulate the industrial base, and pursue enabling technologies for High Energy Laser (HEL) systems. To do this, they formed the High Energy Laser Joint Technology Office (HEL-JTO) to direct and coordinate HEL technology development across academia, industry and government laboratories. In 2017 congress renamed HEL-JTO to the Joint Directed Energy Transition Office (DE-JTO), with a mission to also help with the increased interest to transition DE technology onto militarily useful platforms. Over the years, JTO has advanced state of the art (SoA) in DE technologies, and provided the Services with components necessary to perform initial system demonstrations. Typical funding activities for JTO include sponsoring flagship projects and funding university, military and government labs, and industry. Opportunities exist to team with JTO moving forward. |
Saturday, October 13, 2018 8:36AM - 8:48AM |
J08.00002: Detection and Classification of High Energy Beta Radiation Induced Damage of Raspberry Pi Zero Intended for OPAL CubeSat Jonh Carlos Mojica Decena, John R Dennison, Brian D Wood, Ryan Martineau, Michael J Taylor Radiation survivability of a Raspberry Pi Zero was studied with extended exposures from 0.2 to 2.5 MeV beta radiation of >200krad of total ionizing dose (TID) while undergoing continuous diagnostic cycles. Determining the threshold for radiation damage of inexpensive commercial-off-the-shelf (COTS) components is critical as a cost-saving method in the construction of spacecraft. Characterizing radiation induced damage of COTS with TID allows for proper precautionary measures to maintain spacecraft functionality over the duration of their mission. The specific point and type of failure due to TID is determined to mitigate deleterious effects through enhanced shielding and software or hardware redundancy. TID in the memory and processor units before system failure was measured, along with type, frequency of error, and possibility of system recovery. Careful determination of heat conduction in vacuo of IC’s was conducted to avoid overheating due to delivered battery power and radiation energy deposition. The results will facilitate construction and design of the USU-led OPAL CubeSat, to determine if this COTS can survive >200krad TID received during its 1-2yr mission in LEO orbit. |
Saturday, October 13, 2018 8:48AM - 9:00AM |
J08.00003: Reparametrization of Power Systems Models Using Manifold Boundaries Mark Transtrum, Benjamin Francis, Clifford Youn, Andrija Saric, Aleksander Stankovic We describe a geometric approach to the question of parameter identifiability in models of power systems dynamics: whether parameters can be estimated from available measurements. When a model of a system is to be compared with measurements taken at discrete times, it can be interpreted as a mapping from parameter space into a data or prediction space. Generically, model mappings can be interpreted as manifolds with dimensionality equal to the number of structurally identifiable parameters. Empirically it is observed that model mappings often correspond to bounded manifolds. We review the concept of structural identifiability and propose a definition of practical identifiability based on the topological definition of a manifold with boundary. We numerically construct geodesics on the model manifold and use the results, combined with insights derived from the mathematical form of the equations, to identify combinations of practically identifiable and unidentifiable parameters with which to reparametrize the model. We give several examples of applications to dynamic power systems models. |
Saturday, October 13, 2018 9:00AM - 9:12AM |
J08.00004: Constructing Simplified Models of Transient Dynamics in Power Systems Jacob Nuttall, Benjamin L Francis, Mark K. Transtrum Power production and distribution play an essential role in modern society. The power grid is a complex network of components whose state is often perturbed in response to varying loads, short-circuits, and other disturbances. Effective control requires parsimonious models which make accurate predictions in real-time. Power system models have a number of features that makes their improvement challenging--they are multi-level, multi-user and multi-physics. They are nonlinear and time varying, and discrete structures, such as graphs, are strongly blended with continuous dynamics. We explore the use of model reduction methods to find simplified representations of power systems. Our goal is to identify the emergent structures that govern the large-scale dynamics of the grid. Our method is based on information geometry, and uses advances in computational differential geometry to characterize high-dimensional manifolds in the space of measurements. We present results using a 14-bus test system with 58 parameters. |
Saturday, October 13, 2018 9:12AM - 9:24AM |
J08.00005: Analyzing the movement of particles of magnetic particulate media under the influence of magnetic field. Juan Treto Magnetic particulate media are encountered in a broad range of applications such as magnetic-resonance imaging (MRI), magneto-optical filters, data storage, biomedical applications, nano fluids applications, environmental remediation, magnetic separation, etc. The main focus of this project is to fundamentally analyze the movement of particles of magnetic particulate media under the influence of magnetic field and understand the role of this motion on heat transfer enhancement and mass diffusion. For example, clusters of magnetic nano-particles are used for the treatment of hypothermia, improving heat transfer in liquidized beds, and for flow enhancement by modifying the fluid boundary layers. Different magnetic materials, like iron, will be used to conduct this experiment. |
Saturday, October 13, 2018 9:24AM - 9:36AM |
J08.00006: Lighter is Better? Mechanical Properties of 3D Printed Plastics. Galen Helms, Igor Sevostianov, Boris Kiefer The 3D printing technology segment within advanced manufacturing is expected to be among the fastest growing technology sectors in the world. With the introduction of RepRap style machines, 3D printing has become affordable and by now is almost a household item, which explains at least partially its rapid growth. From a technological point of view, one of the most important aspects of 3D printing is rapid prototyping and printing functional parts or arbitrary shapes. For the latter it is particularly important to understand how filament selection and print settings effect the properties of 3D printed parts and how they compare to industrial standards. We 3D printed standard shapes with infill percentages ranging from 100% to 25% and determined their Young’s modulus through mechanical testing. As filament, we selected ABS (Acrylonitrile Butadiene Styrene), a widely used and well characterized plastic. Careful analysis of our experiments allows us to isolate the effects of infill percentage. Our preliminary results show that the Young’s modulus does not vary linearly with infill as found previously but rather follows a power-law behavior. We will discuss the implications of this finding for 3D printing of functional materials and microstructural modeling of 3D printed plastics. |
Saturday, October 13, 2018 9:36AM - 9:48AM |
J08.00007: Topology of Earth's Magnetic shield David A Smith, Jan J. Sojka The open-closed boundary (OCB) defines the region where geomagnetic field lines transition from being closed to open. Closed field lines have foot points at or near Earth in opposing hemispheres. Open field lines have one foot point at Earth; the other maps to the interplanetary magnetic field (IMF). Charged particles are able to follow these open field lines into Earth's upper atmosphere. The OCB also defines the polar cap boundary. Being able to identify and track the OCB allows study of several components of the geomagnetic system. Among them are the electrodynamics of the geomagnetic field and the reconnection balance between the dayside and nightside of the geomagnetic field. Furthermore, the OCB can provide interesting insights into the precipitation of energetic protons into the ionosphere. Using the Tsyganenko model of the geomagnetic field (T96) we have demonstrated a diurnal fluctuation of the OCB, independent of all other inputs. Also, we have found that this UT effect has an effect on the energy cutoff latitude of energetic protons. We anticipate that the UT effect could have important consequences to modeling the OCB and other polar cap-related events, especially polar cap absorption events affecting high frequency radio wave propagation via polar paths. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700