Bulletin of the American Physical Society
2016 Fall Meeting of the APS Prairie Section
Volume 61, Number 10
Thursday–Saturday, October 6–8, 2016; Northern Illinois University, DeKalb, Illinois
Session E1: Accelerator and Beams Physics / Astrophysics, Space Science and Cosmology |
Hide Abstracts |
Chair: Michael Eads, Northern Illinois University Room: La Tourette Hall 200 |
Saturday, October 8, 2016 10:00AM - 10:35AM |
E1.00001: XLR8: Accelerating Discoveries at Particle Accelerators with Computational Accelerators Invited Speaker: Bela Erdelyi Particle accelerators are some of the largest scientific instruments ever built. They are some of the most complex nonlinear dynamical systems of practical importance. They are the enabling technology for science discoveries in high-energy, particle, nuclear and condensed matter physics, chemistry, and biology. The underlying fundamental science of accelerators is called beam physics. This talk will present some of the computational grand challenges and a few proposed solutions to nonlinear beam dynamics. Synergies with computational astrophysics, along with several shared features and differences will be touched upon. [Preview Abstract] |
Saturday, October 8, 2016 10:35AM - 10:47AM |
E1.00002: Including Boundary Effects of Complex Structures On High Intensity Beams Anthony Gee, Bela Erdelyi With the spread of high intensity particle beam applications, future system designs require sophisticated beam dynamics simulation. Common issues in beam control are aberrations due to space charge (self-fields) and the beam pipe wall (boundary effects). One approach views space charge as an $N$-body problem. Direct summation scales as $O(N^2)$. We implemented a fast $O(N)$ summation algorithm called the Fast Multipole Method in previous work. This was later combined with an adaptive time integrator and used to model the particle dynamics, assuming open boundary conditions. In practice, the beam pipe contributes significantly to the high intensity dynamics. This contribution is geometry dependent and becomes complicated for realistic structures. I will present my current progress in modeling the boundary effects for complex structures. [Preview Abstract] |
Saturday, October 8, 2016 10:47AM - 10:59AM |
E1.00003: Beams and Rings for Precision Searches in HEP Michael Syphers New particle beams and storage rings are being constructed to make precision measurements of particle properties both to verify and to search for physics beyond the Standard Model. A close interplay between the beam preparation, storage ring beam dynamics, and the actual experimental procedure is tantamount to the reduction of systematic errors in these measurements of unprecedented precision. In this talk we will discuss the beam physics and requirements essential for such studies, such as for the Muon g-2 experiment at Fermilab for precision measurements of the muon's magnetic moment and the upper-bound of a muon electric dipole moment. We will also take a quick look at possible requirements for a future all-electric storage ring to search for a non-zero electric dipole moment of the proton. [Preview Abstract] |
Saturday, October 8, 2016 10:59AM - 11:11AM |
E1.00004: Conservative Relaxation of Charged Particles Beams Afnan Al Marzouk, Bela Erdelyi Governed by Coulomb force interactions, a beam of many charged particles is considered as a long range system in its frame. Due to their irregular thermal and dynamical properties, Classical statistical mechanics cannot be applied to long range systems. Therefore, computational methods are essential in studying such systems. We present our developed computational methods to deal with dynamics of beams as long range systems. [Preview Abstract] |
Saturday, October 8, 2016 11:11AM - 11:23AM |
E1.00005: Measuring Newton’s Gravitational Constant from Space with LISA Pathfinder Mengyu Wang, James Thorpe, Jacob Slutsky The value of Newton’s Gravitational Constant (“Big G”) remains uncertain beyond the third significant digit; numerous experiments have produced results with non-overlapping confidence intervals. Identifying and controlling for systematic effects in Big G experiments is a significant challenge. The relative weakness of the gravitational force allows a myriad of influences to distort experimental results. In this work, we make a first attempt at measuring Big G with LISA Pathfinder (LPF) flight data. All Big G measurements to date have been performed from Earth's surface; a measurement from space presents the possibility to identify systematic errors inherent to terrestrial measurement. LPF has demonstrated the ability to measure differential acceleration between two test masses to femto-scale precision. This level of precision allows for a meaningful measurement of the change in differential acceleration between the test masses due to propellant expenditure. In addition to this direct measurement, mass flow sensor data and a gravitational finite element model of the LPF fuel system are used to develop a mathematical model predicting this propellant effect. A Markov Chain Monte Carlo method then fits this model to the observed data to produce probability distributions of the model [Preview Abstract] |
Saturday, October 8, 2016 11:23AM - 11:35AM |
E1.00006: Estakhr's Effect of Superluminal Travel (Time travel, Travel back in time) Ahmad Reza Estakhr Estakhr's effect: Superluminal travel is able to reverse the direction of time and so the direction of your body's metabolism!. so People actually grow younger during Superluminal travel and as they grow younger (during travel back in time), their previous memories are disappearing and being rewritten with new memories from growing older again! (after time travel). So problems of time travel to the past are much more complex than what is imagined. [Preview Abstract] |
Saturday, October 8, 2016 11:35AM - 11:47AM |
E1.00007: Riemannian Geometry as the mathematics of General Relativity John Laubenstein Riemannian Geometry, in its most basic sense, is the mathematics of describing globally curved manifolds using locally flat, or Euclidian, geometry. It is deemed to be ideal for General Relativity due to the Equivalence Principle, which in modern terms is most often defined by the statement that in any sufficiently small region of space-time, the laws of physics for inertial systems hold true. That is, the local region is flat and all the laws of physics, including those of Special Relativity are valid. As such, the task of defining the curved manifold of space-time is in developing the ``rules'' for how locally flat regions of space-time fit together in a patchwork that is globally curved. These ``rules'' are perfectly described using Riemannian Geometry as long as the local region is truly flat. This paper discusses the relationship between Riemannian Geometry and the physical phenomenon of gravitation to ask the question: Does Riemannian Geometry truly define the curved space-time of General Relativity, or is it a mathematical model that closely simulates a more complex physical system of gravitation? [Preview Abstract] |
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