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Events During the Week of July 10th through July 17th, 2022

Monday, July 11th, 2022

No events scheduled

Tuesday, July 12th, 2022

No events scheduled

Wednesday, July 13th, 2022

Physics Summer Fun
Indoor Recess
Time: 12:30 pm
Place: 5310 Chamberlin Hall
Speaker: Sharon Kahn
Abstract: We hope you’ll take a 20-30 minute break on (some/all) Wednesdays this summer (12:30-1pm) to come play together! For nice days, we’ve arranged to borrow some lawn games from the L&S dean’s office and will likely bring along a frisbee and/or a hackeysack, too.
In case of rain, we’ll meet indoors (5310 CH) for board games. Feel free to come play or just hang out!
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Physics Summer Fun
Recess!
Time: 12:30 pm
Place: 5310 Chamberlin Hall
Speaker: Sharon Kahn
Abstract: We hope you’ll take a 20-30 minute break on (some/all) Wednesdays this summer (12:30-1pm) to come play together! For nice days, we’ve arranged to borrow some lawn games from the L&S dean’s office and will likely bring along a frisbee and/or a hackeysack, too.
In case of rain, we’ll meet indoors (5310 CH) for board games. Feel free to come play or just hang out!
Add this event to your calendar
Physics Summer Fun
Weekly Recess
Time: 12:30 pm
Place: 5310 Chamberlin Hall
Speaker: Sharon Kahn
Abstract: We hope you’ll take a 20-30 minute break on (some/all) Wednesdays this summer (12:30-1pm) to come play together! For nice days, we’ve arranged to borrow some lawn games from the L&S dean’s office and will likely bring along a frisbee and/or a hackeysack, too.
In case of rain, we’ll meet indoors (5310 CH) for board games. Feel free to come play or just hang out!
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Thursday, July 14th, 2022

NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Recent results from the ANTARES and KM3NeT neutrino telescopes at the Mediterranean Sea
Time: 2:30 pm
Place:
Speaker: Rodri Gracia, ECAP/ University Erlangen-Nuremberg, Germany
Abstract: ANTARES was the first undersea neutrino telescope and has been taking data steadily since its completion in 2008, until early 2022 when it was decommissioned. Currently, the KM3NeT collaboration is building two additional detectors which will target two different energy ranges. The ORCA detector geometry is optimised of the detection of neutrinos in the GeV range while the ARCA detector geometry has been optimised for the detection of neutrinos in the PeV range and above. In this talk I will review the scientific output of the ANTARES telescope, and I will report on the status of the KM3NeT detectors as well as on the latest results.
Host: Lu Lu
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Friday, July 15th, 2022

Thesis Defense
The Lundquist number scaling of nonlinear MHD fluctuations and transition from quasi-continuous to discrete reconnection activity in MST RFP plasmas
Time: 9:00 am
Place: Sterling B343
Speaker: Steph Kubala , Physics PhD Graduate Student
Abstract: Nonlinear MHD fluctuations appear in both natural and magnetic confinement settings, such as the solar wind, self-organization dynamics in the RFP and spheromak, and current disruptions in tokamak plasmas. In this thesis, parameter scaling experiments oriented toward nonlinear MHD dynamics in RFP plasmas are described. Experimental data have been gathered spanning a wide range of parameter space characterized by Lundquist number, S ∼ 10^4 −10^7, and density, n_e/n_G, where n_G is the empirical density limit. A new programmable power supply allows low-current, low-S operation, which overlaps with parameters available in numerical modeling. Experimental S scalings of magnetic fluctuation amplitude agree relatively well with those from the nonlinear MHD codes DEBS and NIMROD. A transition from quasi-continuous activity to bursty relaxation having discrete sawtooth events is observed in going from low to high S, with a threshold at around S ∼ 10^5. The spectral properties of the magnetic fluctuations change at this transition, including a reduction in fluctuation phase velocity that suggests plasma flow and/or flow profile changes. Momentum transport and flattening of the flow profile are known features associated with sawtooth relaxation in RFP plasmas. This work was supported by U.S. Department of Energy and the American Physical Society's M. Hildred Blewett Award.
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