Events at Physics |
Events During the Week of November 6th through November 12th, 2022
Monday, November 7th, 2022
- Academic Calendar
- Enrollment appointment times for Spring term assigned to students (throughout week)
- Abstract: *Note: actual end time may vary.* CONTACT: 262-3811, registrar@em.wisc.edu URL:
- Plasma Physics (Physics/ECE/NE 922) Seminar
- The magnetic field scale length: an influential property of stellarators
- Time: 12:00 pm
- Place: 1610 Engineering Hall
- Speaker: Matt Landreman, University of Maryland
- Abstract: A scale length can be defined based on the gradient of the magnetic field vector. This information can be useful for optimizing magnetic fields for fusion and understanding constraints on the magnets that produce them. Here we present two applications for the stellarator fusion concept. First, when expanding about the magnetic axis, maximizing the field scale length can increase the volume in which quasisymmetry is achieved. Second, the field scale length is shown to constrain how far away the electromagnetic coils can be from the plasma. Increasing the field scale length can therefore improve confinement, increase clearances for engineering, and reduce the size and cost of a fusion reactor.
Tuesday, November 8th, 2022
- Academic Calendar
- Election Day
- Time: 7:00 am - 8:00 pm
- Abstract: Election includes Governor, Congress, State Legislature. Election includes Governor, Congress, State Legislature, Attorney General, Lt. Gov, Sec of State, Treasurer, Clerk of Circuit Court, and Sheriff. Go to MyVote.wi.gov to find your polling place, see what is on your ballot, and check your registration. If you are not registered at your current address, you can register at your polling place on Election Day. See vote.wisc.edu for information on registration and voter ID. CONTACT: malischke@wisc.edu URL:
- Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
- A status update on the Galactic Center GeV gamma-ray excess
- Time: 2:00 pm
- Place: Join Zoom Meeting Meeting ID: 912 3071 4547
- Speaker: Tracy Slatyer , MIT
- Abstract: The inner region of the Milky Way Galaxy hosts a central glow of gamma rays often called the Galactic Center Excess. This excess is highly statistically significant and has garnered great interest as a possible signal of either dark matter particles colliding and annihilating, or a previously undiscovered population of pulsars in the stellar bulge. I will briefly outline the history of our understanding of the excess and the arguments for various interpretations, attempt to describe the current status of the controversy including recent developments, and discuss some future paths forward.
- Host: Baha Balantekin
- MRSEC Seminar
- New Frontiers in Nanoscale Magnetism: Towards Three-Dimensional Materials and Devices
- Time: 3:00 pm - 4:00 pm
- Place: Materials Science & Engineering Building, Room 265
- Speaker: Amalio Fernández-Pacheco, Institute of Nanoscience & Materials of Aragón CSIC-University of Zaragoza, Spain
- Abstract: The expansion of nanomagnetism to three dimensions provides exciting opportunities to explore new physical phenomena and opens great prospects to create 3D magnetic devices for green computing technologies.
In this talk, I will present some of our recent works dedicated to the investigation of three dimensional artificial magnetic materials, including multilayered and complex-shaped geometries. The talk will give an overview of the new methods we have developed to fabricate and characterize these nanomaterials, and some of the new functionalities obtained. This includes the creation of localized spin textures, topological defects and stray fields exploiting geometrical effects, the automotive 3D motion of domain walls, and the generation of chiral spin interactions via geometry and interfacial effects. - Host: MRSEC
- Theory Seminar (High Energy/Cosmology)
- Cosmological Constant and Gravitino Mass: Statistical Correlations from the Nilpotent Goldstino Formalism.
- Time: 4:00 pm - 5:00 pm
- Place: Chamberlin 5280
- Speaker: Kajal Singh, Harish-Chandra Research Institute
- Abstract: We obtain the joint distribution function of the gravitino mass and the cosmological constant in KKLT and Large Volume Scenario models with an anti-D3 brane at the bottom of a warped throat as the uplift sector. Moduli stabilisation is incorporated so that we sample only over points corresponding to vacua. The effects of the anti-D3 brane are computed using the nilpotent goldstino formalism. The distribution function for the hierarchies of warped throats serves as a key input. In the limit of zero cosmological constant, we find that the distribution functions are tilted favourably towards lower scales of supersymmetry breaking.
- Host: George Wojcik
Wednesday, November 9th, 2022
- Department Meeting
- Time: 12:15 pm - 1:00 pm
- Place: B343 Sterling Hall
- Speaker: Mark Eriksson, UW-Madison, Physics
- Monthly Department Meeting
- Host: Mark Eriksson
- Outreach
- Wednesday Nite @ The Lab
- Can X-rays Trace the Origins of Printing?
- Time: 7:00 pm - 8:00 pm
- Place: free and open to the public; Biotech Bldg auditorium or register for zoom link at go.wisc.edu/240r59
- Speaker: Minhal Gardezi, UW–Madison physics graduate students
- Host: Tom Zinnen
Thursday, November 10th, 2022
- R. G. Herb Condensed Matter Seminar
- Scanning tunneling spectroscopy of unconventional superconductors
- Time: 10:00 am - 11:00 am
- Place: 5310 Chamberlin
- Speaker: Pavlo Sukhachov, Yale
- Abstract: Motivated by recent experimental observations of unconventional superconductivity in twisted bilayer and trilayer graphenes, we develop a theory describing the differential conductance between a normal STM tip and a 2D superconductor with an arbitrary gap structure. Our analytical scattering theory accounts for Andreev reflections, which become prominent at larger transmission between the tip and the superconductor. Exploiting the dependence of Andreev reflection on the relative position of the STM tip with respect to the lattice symmetry points, we show that the structure of the superconducting gap can be extracted by combining weak- and strong-tunneling limits of differential conductance. Furthermore, the theory incorporates a tip-induced scattering potential within the 2D material, which allows us to describe subgap resonances.
- Host: Alex Levchenko
- Plasma Physics (Physics/ECE/NE 922) Seminar
- Let's Talk Fusion Energy
- Time: 2:15 pm - 3:30 pm
- Place: 1003 Engineering Centers Building, Tong Auditorium
- Speaker: U.S. Department of Energy ARPA-E Program Director, et al., U.S. DOE
- Abstract: We have a delegation from the Department of Energy and ARPA-E visiting UW Madison, and they are offering a town hall event on Thursday at 2.15 PM. Please see the attached flyer. Everybody is invited to participate. We hope you can attend this important event, which will be an opportunity to discuss recent program developments to accelerate the path to commercial fusion energy. Scott Hsu, DOE Lead Fusion Coordinator, Office of the Under Secretary for Science and Innovation Ahmed Diallo, Program Director, ARPA-E Sam Wurzel, Technology-to-Market Advisor, ARPA-E Katharine Greco, Fellow, ARPA-E Ed Cruz, Tech SETA, ARPA-E (Booz Allen Hamilton) Ziaur Rahman, Tech SETA, ARPA-E (Booz A t at the University of Maryland – College Park
- Host: Oliver Schmitz
- Astronomy Colloquium
- The Roman Galactic Exoplanet Survey
- Time: 3:30 pm - 4:30 pm
- Place: 4421 Sterling Hall
- Speaker: Prof. Scott Gaudi, Ohio State University
- Abstract: I summarize the scientific motivation and properties of the Roman Galactic Exoplanet Survey (RGES), one possible realization of the Galactic Bulge Time Domain Survey, which itself is one of three core community surveys that will be carried out with NASA’s Nancy Roman Space Telescope (Roman). The notional RGES survey will consist of photometric monitoring of a ~2 sq. degree area toward the Galactic bulge every 15 minutes in a wide, 1-2 micron filter in order to search for cold planets using gravitational microlensing. The survey will consist of six ~72-day seasons, with most of the seasons being concentrated early and late in the nominal 5-year Roman prime mission. I will summarize the expected yield of the RGES survey, and then describe future activities in preparation for, and further definition of, the Galactic Bulge Time Domain Survey.
- Host: Ke Zhang
Friday, November 11th, 2022
- Wisconsin Quantum Institute
- Vescent Photonics: Overview of Technologies & Student Opportunities
- Time: 12:05 pm - 1:00 pm
- Place: 5310 Chamberlin
- Speaker: Eduardo Oteiza, Vescent Photonics
- Abstract: Eduardo Oteiza, Ph.D., will present how Vescent Photonics has become one of the leading designers and manufacturers of lasers, electro-optic tools, and control electronics used in precision optical measurements. Eduardo will provide an overview of their field-deployable products which enable state-of-the-art timing, time transfer, frequency transfer, quantum computing, precision navigation in both GPS-enabled & GPS-denied environments, next-generation spectroscopic techniques, and a host of other applications propelled by Quantum 2.0.
Eduardo will spend the second half of his talk in a more informal session with students, describing some internship and job opportunities available at Vescent for 2023. Undergraduate and graduate students interested in joining a quantum company that has knowledge in circuits, photonics, mechanical systems, and software programming should be sure to attend and bring their questions.
- Host: Thad Walker
- Physics Department Colloquium
- On the Threshold of Laser Fusion Ignition and the Pathway to Inertial Fusion Energy
- Time: 3:30 pm - 6:00 pm
- Place: 2241 Chamberlin Hall
- Speaker: Tammy Ma, LLNL
- Host: Ellen Zweibel
Saturday, November 12th, 2022
- Atomic Physics Seminar
- Midwest Cold Atom Workshop
- Time: 9:00 am - 6:00 pm
- Place: Chamberlin Hall
- Speaker: Various, Various
- Abstract: To register:
- Host: Deniz Yavuz