{ "134545-21874474": { "datetime_modified":"20250401T073847", "datetime_start":"20250409T150000", "datetime_end":"20250409T160000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Department Colloquium | Hunting for Ghosts with Rare Isotope Doped Advanced Sensors", "occurrence_title":"", "combined_title":"Department Colloquium | Hunting for Ghosts with Rare Isotope Doped Advanced Sensors: Kyle Leach (Colorado School of Mines)", "event_subtitle":"Kyle Leach (Colorado School of Mines)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Nuclear beta and electron capture (EC) decay serve as sensitive probes of the structure and symmetries at the microscopic scale of our Universe. As such, precision measurements of the final-state products in these processes can be used as powerful laboratories to search for new physics from the meV to TeV scale, as well as addressing fundamental questions of quantum mechanics at the subatomic scale. Significant advances in \u201crare isotope\u201d availability and quality, coupled with decades of sensing technique development from the AMO community have led us into a new era of fundamental tests of nature using unstable nuclei. For the past few years, we have taken the approach of embedding radioisotopes in thin-film superconducting tunnel junctions (STJs) to precisely measure the recoiling atom that gets an eV-scale \u201ckick\u201d from the neutrino following EC decay. These recoils are encoded with the fundamental quantum information of the neutrino and decay process, as well as carrying unique signatures of weakly coupled beyond standard model (BSM) physics; including neutrino mass, exotic weak currents, and potential \u201cdark\u201d particles created within the energy-window of the decay. These measurements provide a complimentary and (crucially) model-independent portal to the dark sector with sensitivities that push towards synergy between laboratory and cosmological probes. In this talk, I will discuss the broad program we have developed to provide leading limits in these areas as well as the technological advances across several sub-disciplines of science required to enable this work, including subatomic physics, quantum engineering, atomic theory, and materials science. Finally, I will discuss future prospects of extending this work using macroscopic amounts of harvested exotic atoms from the Facility for Rare Isotope Beams (FRIB) in optically levitated nanospheres for direct momentum measurements of the decay recoils.", "occurrence_notes":null, "guid":"134545-21874474@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134545", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Science","Physics"], "website":"", "sponsors":[ { "group_name":"Department Colloquia", "group_id":"3804", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", 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There will be some German chocolate to snack on. Silvia Grzeskowiak (sgrzesko@umich.edu) will bring games, and the hour will be spent chatting and playing games in German (e.g. Tabu.)", "occurrence_notes":null, "guid":"131292-21868133@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/131292", "building_id":"1000207", "building_name":"Modern Languages Building", "campus_maps_id":"111", "room":"3110", "location_name":"Modern Languages Building", "has_livestream":0, "cost":"", "tags":["Germanic Languages And Literatures","German Studies","German","Games"], "website":"", "sponsors":[ { "group_name":"Germanic Languages & Literatures", "group_id":"3621", "website":"http:\/\/www.facebook.com\/umichGerman\/" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/01\/event_131292_original-1.jpg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/01\/event_131292_original-1.jpg" }, "occurrence_count":12, "first_occurrence":21868122 } , "134754-21874876": { "datetime_modified":"20250407T100702", "datetime_start":"20250409T150000", "datetime_end":"20250409T160000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Student Number Theory: The Fontaine-Wintenberger theorem", "occurrence_title":"", "combined_title":"Student Number Theory: The Fontaine-Wintenberger theorem: Beomseok Kwon", "event_subtitle":"Beomseok Kwon", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Abstract: Let K be a perfectoid field of mixed characteristic (0, p). Then, one can form the tilt K^\u266d of K, which is a perfectoid field of characteristic p. The Fontaine-Wintenberger theorem says that the absolute Galois group of K and the absolute Galois group of K^\u266d are isomorphic. In this talk, we will define the tilting functor and construct its inverse using the Witt vectors. Then, we will see a more conceptual proof using the almost purity theorem. This proof also motivated Scholze to define perfectoid algebras.", "occurrence_notes":null, "guid":"134754-21874876@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134754", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"3088", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Student Number Theory Seminar - Department of Mathematics", "group_id":"4906", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21874876 } , "133847-21873616": { "datetime_modified":"20250409T142032", "datetime_start":"20250409T150000", "datetime_end":"20250409T160000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Zumba Through Wellness Wednesday", "occurrence_title":"Session 1", "combined_title":"Zumba Through Wellness Wednesday: Session 1", "event_subtitle":"", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Rackham Student Government welcomes you to a couple hours of wellness and community bonding with fellow graduate students!Sign up for a FREE 50-minute Zumba session at NCRB!", "occurrence_notes":null, "guid":"133847-21873616@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/133847", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"NCRB", "has_livestream":0, "cost":"", "tags":["Sessions"], "website":"https:\/\/sessions.studentlife.umich.edu\/p\/track\/13933", "sponsors":[ { "group_name":"Sessions @ Michigan", "group_id":"4791", "website":"https:\/\/sessions.studentlife.umich.edu\/" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21873616 } , "130711-21866562": { "datetime_modified":"20250108T095323", "datetime_start":"20250409T151000", "datetime_end":"20250409T161000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"15:10:00", "time_end":"16:10:00", "time_zone":"America\/Detroit", "event_title":"MIPSE Seminar | RF Plasma Cathodes and Other Research Activities in the Plasma Propulsion Group at NRL", "occurrence_title":"", "combined_title":"MIPSE Seminar | RF Plasma Cathodes and Other Research Activities in the Plasma Propulsion Group at NRL: Dr. Marcel Georgin, U.S. Naval Research Laboratory", "event_subtitle":"Dr. Marcel Georgin, U.S. Naval Research Laboratory", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract:\r\nThis talk discusses recent work on RF plasma cathodes, propellant agnostic electron sources for electric propulsion systems that enable new deep space exploration mission architectures such as in-situ resource utilization. We develop the fundamental theory for these devices and demonstrate its effectiveness at determining I-V characteristics and performance. From our measurements and model, we project thruster performance and discuss the consequences for space exploration. Then we dive into non-ideal behavior that can be exhibited in these cathodes including sheath expansion and mode transitions. The remainder of the discussion will overview other plasma-related research activities in the NRL propulsion group.\r\n\r\nAbout the Speaker: \r\nDr. Marcel Georgin is an Aerospace Engineer at the Naval Research Laboratory in Washington, D.C. He earned his bachelor\u2019s degree in physics from McGill University in Montreal, Canada, and his Ph.D. in applied physics from the University of Michigan where he studied plasma instabilities in electron sources for electric propulsion systems. His research interests are at the intersection of plasma physics and engineering, with a strong focus on space propulsion. He is currently working on a variety of plasma-related topics, including propellant agnostic electron sources, hypersonics environmental simulation, advanced thermionic cathodes, and more.\r\n\r\nThe seminar will be conducted in person and simulcast via Zoom: https:\/\/mipse.umich.edu\/seminars_2425.php#winter2025", "occurrence_notes":null, "guid":"130711-21866562@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/130711", "building_id":"1000448", "building_name":"Electrical Engineering and Computer Science Building", "campus_maps_id":"56", "room":"1003", "location_name":"Electrical Engineering and Computer Science Building", "has_livestream":0, "cost":"", "tags":["Talk","seminar","Propulsion","Plasma","Physics","Michigan Engineering","In Person"], "website":"https:\/\/mipse.umich.edu\/seminars_2425.php", "sponsors":[ { "group_name":"Michigan Institute for Plasma Science and Engineering (MIPSE)", "group_id":"4073", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg" }, "occurrence_count":1, "first_occurrence":21866562 } }