Events at Physics

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Events During the Week of May 1st through May 8th, 2016

Monday, May 2nd, 2016

Plasma Physics (Physics/ECE/NE 922) Seminar
Pedestal-to-wall 3D plasma edge modeling using EMC3-EIRENE
Time: 12:00 pm - 1:00 pm
Place: 1153 Mechanical Engineering
Speaker: Dr. Jeremy Lore, Oak Ridge National Laboratory
Host: UW Madison
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Tuesday, May 3rd, 2016

Chaos & Complex Systems Seminar
Year-end celebration
Time: 12:05 pm - 1:00 pm
Place: 4274 Chamberlin Hall (refreshments will be served)
Abstract: Following the tradition of recent years in which we had a delightful discussion of where we have come and where we might go with the seminars, this last seminar of the semester will be devoted to a continuation of that discussion without any formal speaker. We will also discuss what we want to do during our informal weekly lunches on the Memorial Union Terrace which begin on May 10th. This celebration will include expanded refreshments, to which your own culinary contribution is welcome.
Host: Clint Sprott
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Wednesday, May 4th, 2016

No events scheduled

Thursday, May 5th, 2016

Cosmology Journal Club
An Informal discussion about a broad variety of arXiv papers related to Cosmology
Time: 12:15 pm - 1:15 pm
Place: 5242 Chamberlin Hall
Abstract: Please visit the following link for more details:
Please feel free to bring your lunch!
If you have questions or comments about this journal club, would like to propose a topic or volunteer to introduce a paper, please email Amol Upadhye (
Host: Amol Upadhye
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Astronomy Colloquium
Precision Stellar Astrophysics: Asteroseismology and Large Spectroscopic Surveys
Time: 3:30 pm - 5:05 pm
Place: 4421 Sterling Hall, Coffee and cookies 3:30, Talk begins 3:45
Speaker: Dr. Marc Pinsonneault, Ohio State University
Abstract: Large time domain and spectroscopic surveys are revolutionizing stellar astrophysics. In this talk I will focus on the APOKASC project, involving a combination of asteroseismic and rotational data from the Kepler satellite and high-resolution H-band spectroscopy from APOGEE. Asteroseismology gives precise surface gravities and evolutionary state measurements, and the frequency pattern combined with spectroscopic data can also be used to independently measure mass, radius, and age. I critically assess the performance of asteroseismology against independent measurements, and also discuss the prospects for detailed tests of stellar physics (helium, convection zone depth, core mass and rotation.) Insights into stellar populations, such as spectroscopic mass estimates and an unexpectedly large fraction of young alpha-rich stars, will also be covered. Future and ongoing missions will be reviewed, and synergies with Gaia will be discussed.
Host: Professor Robert Mathieu
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Theory Seminar (High Energy/Cosmology)
Electroweak inos, natural SUSY and HL-LHC
Time: 3:30 pm
Place: 5310 Chamberlin Hall
Speaker: Howard Baer
Abstract: Recent clarifications in naturalness require light higgsinos ~100-200 GeV while stops are highly mixed but can lie in the multi-TeV range at little cost to naturalness. These qualities means the expected mass hierarchy of electroweak-inos is inverted from the usual case in that higgsinos lie at the lower mass rungs while gauginos lie at higher mass. Qualitatively new signatures for SUSY discovery at LHC then appear. Gluino pair cascade decays should contain distinctive low invariant mass dilepton pairs. A new same-sign diboson signature emerges from wino pair production which should provide the greatest reach for HL-LHC in the gaugino mass direction. Soft dilepton pairs from higgsino pair production recoiling againsthard jets should give HL-LHC reach in the higgsino mass direction. It appears that 3000 fb-1 should be sufficient to cover natural SUSY parameter space with better than 3% electroweak fine-tuning. I also mention implications of naturalness for ILC searches and for higgsino-like WIMP and axion dark matter searches.
Host: Vernon Barger
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Careers for Physicists
Career Panel with Physics Board of Visitors Members
Time: 4:30 pm - 5:30 pm
Place: 2241 Chamberlin Hall
Speaker: Various BOV members
Abstract: Career Panel for grads and undergrads

with Physics BOV members including (but not limited to):

Greg Jaczko, former chair of the NRC
Tom Dillinger, Oracle
Bill Ho, Intellectual Property Development Consultant
Host: Albrecht Karle
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Friday, May 6th, 2016

Physics Department Colloquium
Distinguished Alumni Award Winner
A Search for Space-Time Correlations from the Planck Scale with the Fermilab Holometer
Time: 4:00 pm - 5:00 pm
Place: 2241 Chamberlin Hall (coffee at 3:30 pm)
Speaker: Steve Meyer, The University of Chicago
Abstract: Measurements are reported of high frequency cross-spectra of signals from the Fermilab Holometer, a pair of co-located 39 m, high power Michelson interferometers. The instrument obtains differential position sensitivity to cross-correlated signals far exceeding any previous measurement in a broad frequency band extending to the 3.8 MHz inverse light crossing time of the apparatus. A model of universal exotic spatial shear correlations that matches the Planck scale holographic information bound of space-time position states is excluded to 4.6 sigma significance.
Host: Peter Timbie
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