Happening @ Michigan https://events.umich.edu/list/rss RSS Feed for Happening @ Michigan Events at the University of Michigan. MIPSE Seminar | Journey to the Sun (January 27, 2021 3:30pm) https://events.umich.edu/event/80221 80221-20601997@events.umich.edu Event Begins: Wednesday, January 27, 2021 3:30pm
Location: Off Campus Location
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The seminar is free and open to the public.
To request the Zoom link, please send an email to:
mipse-central@umich.edu

Abstract:
NASA Heliophysics research studies a vast system stretching from the Sun to Earth to far beyond the edge of the planets. Studying this system – much of it driven by the Sun’s constant outpouring of solar wind – not only helps us understand fundamental information about how the universe works, but also helps protect our technology and astronauts in space. NASA seeks knowledge of near-Earth space, because, when extreme, space weather can interfere with our communications, satellites and power grids. The study of the Sun and space can also teach us more about how stars contribute to the habitability of planets through-out the universe.

Mapping out this interconnected system requires a holistic study of the Sun’s influence on space, Earth and other planets. NASA has a fleet of spacecraft strategically placed throughout our heliosphere – from Parker Solar Probe at the Sun observing the very start of the solar wind, to satellites around Earth, to the farthest human-made object, Voyager, which is sending back observations on interstellar space. Each mission is positioned at a critical, well-thought out vantage point to observe and understand the flow of energy and particles throughout the solar system, and all helping us untangle the effects of the star we live with.

About the Speaker:
Dr. Nicola Fox is the Heliophysics Division Director in the Science Mission Directorate at NASA Headquarters in Washington, DC. Until August 2018, Dr. Fox worked at the Applied Physics Lab at the Johns Hopkins University where she was the Chief Scientist for Heliophysics and the project scientist for NASA’s Parker Solar Probe. Dr. Fox served as the deputy project scientist for the Van Allen Probes, and the operations scientist for the International Solar Terrestrial Physics program. Fox received her BS in Physics and PhD in Space and Atmospheric Physics from the Imperial College of Science, Technology and Medicine in London. She received an MS in Telematics and Satellite Communications from the University of Surrey.

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Lecture / Discussion Tue, 22 Dec 2020 11:28:38 -0500 2021-01-27T15:30:00-05:00 2021-01-27T16:30:00-05:00 Off Campus Location Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Dr. Nicola Fox
MIPSE Seminar | Powering the Future: Fusion & Plasmas, the FESAC Long Range Planning Report (February 10, 2021 3:30pm) https://events.umich.edu/event/81665 81665-20941450@events.umich.edu Event Begins: Wednesday, February 10, 2021 3:30pm
Location: Off Campus Location
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The seminar is free and open to the public.
To request the Zoom link, please send an email to:
mipse-central@umich.edu

Abstract:
A long-range plan for DOE Fusion Energy Sciences has been created to accelerate the development of fusion energy and advance plasma science. This plan is based on substantial input from the re-search community, which conveyed a wealth of creative ideas and its passion to accelerate fusion energy development and advance plasma science over an intensive two-year process. The FESAC Long Range Planning Report provides a decade-long vision for the field of fusion energy and plasma science, presenting a path to a promising future of new scientific discoveries, industrial applications, and ultimately the delivery of fusion energy.

About the Speaker:
Troy Carter is a Professor of Physics at the University of California, Los Angeles. Prof. Carter is the Director of the Basic Plasma Science Facility (BaPSF), a collaborative research facility for plasma science supported by DOE and NSF. He is also the Director of the Plasma Science at Technology Institute (PSTI) at UCLA. His research focuses on experimental studies of fundamental processes in magnetized plasmas and is motivated by current issues in magnetic confinement fusion energy research and in space and astrophysical plasmas including magnetic reconnection, turbulence and transport in magnetized plasmas, and the nonlinear physics of Alfvén waves. He was a co-recipient of the 2002 APS DPP Excellence in Plasma Physics Research Award and is a Fellow of the APS. Prof. Carter received BS degrees in Physics and Nuclear Engineering from North Carolina State University in 1995 and a PhD in Astrophysical Sciences from Princeton University in 2001.

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Lecture / Discussion Wed, 03 Feb 2021 10:23:51 -0500 2021-02-10T15:30:00-05:00 2021-02-10T16:30:00-05:00 Off Campus Location Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Prof. Troy Carter
MIPSE Seminar | Shining a Light on the Complex Physics of Low-temperature Plasmas (March 10, 2021 3:30pm) https://events.umich.edu/event/80222 80222-20601998@events.umich.edu Event Begins: Wednesday, March 10, 2021 3:30pm
Location: Off Campus Location
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The seminar is free and open to the public.
To request the Zoom link, please send an email to:
mipse-central@umich.edu

Abstract:
Research into low-temperature plasmas (LTPs) is a thriving area, stimulated not only by the range of applications of LTP devices, but also by the richness and complexity of the physical phenomena which have in recent years become evident in such plasmas - instabilities and self-organization, for example. Understanding such phenomena offers a means of optimizing the performance of existing devices, while also guiding the development of next-generation sources. Such objectives are challenging and will require a combination of advanced numerical, theoretical, and experimental approaches, many of which are still under development.

New experimental approaches applied to LTPs can offer insights into aspects such as particle properties and dynamics, which may be inaccessible to conventional diagnostics. In recent years, highly-sensitive coherent and incoherent Thomson scattering implementations have been achieved for magnetized LTPs, providing evidence for, and information on, instabilities implicated in anomalous transport, and new access to electron properties. In this talk, recent insights gained from Thomson scattering in such plasmas will be discussed, with illustrations of how dialogue between experiments, theory and numerical simulations have improved current understanding.

About the Speaker:
Dr. Sedina Tsikata is a researcher with the CNRS, the French National Center for Scientific Research, working at the ICARE laboratory in Orléans, France. She received undergraduate and graduate degrees from, respectively, MIT and Ecole Polytechnique, and her postdoctoral research was funded by the French Space Agency. Her main research focuses on understanding phenomena in magnetized plasmas via the development and application of new diagnostics. Dr. Tsikata has received recognitions from the French Physics Society (Prix René Pellat) and from the CNRS (Médaille de Bronze).

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Lecture / Discussion Tue, 22 Dec 2020 11:36:16 -0500 2021-03-10T15:30:00-05:00 2021-03-10T16:30:00-05:00 Off Campus Location Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Dr. Sedina Tsikata
MIPSE Seminar | Rethinking the Art of Plasma Etch (March 24, 2021 3:30pm) https://events.umich.edu/event/80223 80223-20601999@events.umich.edu Event Begins: Wednesday, March 24, 2021 3:30pm
Location: Off Campus Location
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The seminar is free and open to the public.
To request the Zoom link, please send an email to:
mipse-central@umich.edu

Abstract:
Since the 1970s, the semiconductor industry has fabricated electronic circuits using a plasma based pattern-transfer approach that is remarkably reminiscent of the etching artform used centuries ago. Only now, the patterns are a million times smaller and driven by the wafer fab equipment industry. The most advanced plasma etching technique in production today is called atomic layer etching (ALE) in which a single layer is re-moved in a cyclic manner. This talk will review the ALE approach in comparison to conventional plasma etching techniques, such as Reactive Ion Etching (RIE). As RIE reaches its fifth decade, its drawbacks have become apparent. ALE offers better control by isolating steps in time and switching between the steps in a repeatable cycle. To the extent that an ALE process behaves ideally – with high ALE synergy and self-limiting behavior – the primary benefit is improved uniformity across all length scales: at the surface, between different aspect ratios, and across the full wafer. Another benefit that will be highlighted is the atomic-scale smoothness in topography of the surface left behind after etching. The underlying mechanism and benefits of plasma ALE will be described, providing insight into the plasma science be-hind the ancient art of etching. Overall, ALE is simpler to under-stand than conventional plasma etch processing, and is proving to be important as we apply the art of etch at the atomic scale.

About the Speaker:
Richard A. Gottscho is Executive VP, Chief Technology Officer at Lam Research since May 2017. He previously was Executive VP, Global Products Group beginning August 2010; and group VP and general manager, Etch Businesses beginning March 2007. He joined Lam in January 1996 and has held various director and VP roles spanning deposition, etch, and clean products. Prior to joining Lam, he was at Bell Laboratories for 15 years, where he headed research departments in electronics materials, electronics packaging, and flat panel displays. In 2016, Dr. Gottscho was elected to the National Academy of Engineering. He has received several awards, including the AVS Peter Mark Memorial Award, AVS Plasma Science and Technology Division Prize, the Dry Process Symposium Nishizawa Award, and the Tegal Thinker Award. He is a fellow of the APS and AVS. He has authored numerous papers, patents, and lectures, and has served on journal editorial boards and program committees for major conferences in plasma science and engineering. He served as vice-chair of a National Research Council study on plasma science. Dr. Gottscho earned Ph.D. and B.S. degrees in physical chemistry from the Massachusetts Institute of Technology and Pennsylvania State University, respectively.

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Lecture / Discussion Tue, 22 Dec 2020 11:44:01 -0500 2021-03-24T15:30:00-04:00 2021-03-24T16:30:00-04:00 Off Campus Location Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Dr. Richard Gottscho
MIPSE Seminar | Mode Transitions in Low-temperature Aerospace Plasmas (March 31, 2021 3:30pm) https://events.umich.edu/event/80224 80224-20602000@events.umich.edu Event Begins: Wednesday, March 31, 2021 3:30pm
Location: Off Campus Location
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The seminar is free and open to the public.
To request the Zoom link, please send an email to:
mipse-central@umich.edu

Abstract:
Laboratory plasmas can experience abrupt transitions between operating modes during which either the plasma structure or dynamics undergo a sudden change. Nonlinear in nature, these mode transitions typically result from the existence of multiple stable plasma states. When developing new plasma sources, transitions between states generally occur in mysterious and oftentimes unexpected ways. Unpredictable mode transitions are particularly problematic to the design of new plasma-based aerospace technologies, such as electric propulsion systems. Detailed models of mode transition physics and scaling are critical to ensuring new systems behave as expected within their desired operating range. In this talk I will present experimental and theoretical research into the nature of mode transitions for two emerging technologies. The first is the helicon plasma thruster, an electrodeless propulsion concept relying on radiofrequency plasma heating and acceleration through a magnetic nozzle. The second, the plasma magnetoshell, is an aerocapture concept using magnetized plasma to generate drag on a spacecraft entering a planetary atmosphere. I will highlight the potential for new data science techniques to significantly advance the discovery and analysis of plasma mode transitions.

About the Speaker:
Dr. Justin Little is an Assistant Professor in the William E. Boeing Department of Aeronautics & Astronautics at the University of Washington. He received a BS in Physics and Aero-space engineering from the University of California, Irvine, and a PhD in Mechanical & Aerospace Engineering from Princeton University. Prof. Little’s research focuses on understanding how low-temperature plasma physics influence the performance and design of emerging electric propulsion technologies. His research methods emphasize a close relationship between reduced-order theoretical modeling and innovative experiment design to explore the fundamental scaling of dominant physics. He is a National Defense Science and Engineering Graduate Fellow and a recipient of the AFOSR Young Investigator Program award.

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Lecture / Discussion Tue, 22 Dec 2020 11:49:00 -0500 2021-03-31T15:30:00-04:00 2021-03-31T16:30:00-04:00 Off Campus Location Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Prof. Justin Little
MIPSE Seminar | Physics of Partially Magnetized ExB Plasmas in the Laboratory and Space (April 14, 2021 3:30pm) https://events.umich.edu/event/80225 80225-20602001@events.umich.edu Event Begins: Wednesday, April 14, 2021 3:30pm
Location: Off Campus Location
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The seminar is free and open to the public.
To request the Zoom link, please send an email to:
mipse-central@umich.edu

Abstract:
Partially magnetized plasma is a regime where the electron dynamics across the magnetic field are controlled by the magnetic field. The electron Larmor radius is much smaller than the macroscale (e.g., geometric scale of the domain or device size), while the ion Larmor radius is much larger. Ions are weakly affected by the magnetic field. Such regimes occur in parts of Earths’ ionosphere, the solar chromosphere, and collisionless shocks in space. In natural conditions, the electric field perpendicular to the magnetic field is often created due to the relative flow of the electrons and ions. In laboratory and technological plasmas, an external electric field perpendicular to the magnetic field is applied so that the ions can be extracted and accelerated by the electric field, while the electrons remain trapped by the magnetic field enhancing the discharge efficiency. Such cross-field (or ExB) discharges are widely used in magnetron sputtering devices for material processing and plasma electric propulsion such as Hall thrusters. Despite their long history, many aspects of ExB physics are only qualitatively understood precluding the predictive modeling of, for example, the next generation of Hall thruster for space propulsion or the theoretical prediction of ionosphere irregularities. Quantitative characteristics of nonlinear plasma instabilities, plasma turbulence, and associated anomalous transport remain poorly understood. Physics of instabilities and transport in partially magnetized ExB plasmas will be discussed, presenting recent advances in analytical theory and numerical approaches, and highlighting critical questions and problems.

About the Speaker:
Andrei Smolyakov is a Professor in the Department of Physics and Engineering Physics at the University of Saskatchewan, Canada. He received his MSc. (Diploma of Engineer-Physicist) and Ph.D. (Candidate of Physical and Mathematical Sciences) degrees in 1983 and 1986, respectively, both from Moscow Institute of Physics and Technology, Russia. His research interests include basic plasma physics with applications to magnetic fusion, laboratory plasmas, and plasma for electric pro-pulsion. He is a Fellow of American Physical Society, Senior Member of the Institute of Electrical and Electronics Engineers, and a Professional Engineer registered in the Province of Saskatchewan. He is a member of the editorial boards for several plasma physics journals and is an Associate Editor for Physics of Plasmas of AIP.

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Lecture / Discussion Tue, 22 Dec 2020 11:53:42 -0500 2021-04-14T15:30:00-04:00 2021-04-14T16:30:00-04:00 Off Campus Location Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Prof. Andrei Smolyakov
MIPSE Seminar | Scaling Intense Laser-Atom Interactions from Low to High Frequency (October 13, 2021 3:30pm) https://events.umich.edu/event/86289 86289-21632590@events.umich.edu Event Begins: Wednesday, October 13, 2021 3:30pm
Location: Electrical Engineering and Computer Science Building
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

Abstract:
Over the past three decades, the tailoring of a light field for manipulating the dynamics of a system at the quantum level has taken a prevalent role in modern atomic, molecular and optical physics. As first described by L. V. Keldysh, the ionization of an atom by an intense laser field will evolve depending upon the light characteristics and atomic binding energy. Numerous experiments have systematically investigated the dependence of the intensity and pulse duration on the ionization dynamics. However, exploration of the wavelength dependence has been mainly confined to wavelengths near 1 μm, or in the language of Keldysh to the multiphoton or mixed ionization regime. It is technically possible to perform more thorough test the strong-field limit (tunneling), and exploit the scaling laws at wavelengths greater than 1 μm. In addition, the emergence of XFELs has broadened the scope into the x-ray regime. This new perspective on strong-field interactions is driving a renewed interest in the fundamental physics and a renaissance in applications. This talk will examine the implication of the strong-field scaling as it pertains to the production of energetic particles, the generation of attosecond pulses and molecular imaging.

About the Speaker:
Louis F. DiMauro is Professor of Physics and Hagenlocker Chair at the Ohio State University (OSU). He received his BA (1975) from Hunter College, CUNY and his Ph.D. from University of Connecticut in 1980 and was a postdoctoral fellow at SUNY Stony Brook before arriving at AT&T Bell Laboratories in 1981. He joined the staff at Brookhaven National Laboratory in 1988 rising to the rank of senior scientist. In 2004 he joined the faculty at OSU. He was awarded 2004 BNL/BSA Science & Technology Prize, 2012 OSU Distinguish Scholar Award, the 2013 OSA Meggers Prize and the 2017 APS Schawlow Prize in Laser Science. He is a Fellow of the American Physical Society, the Optical Society of American and the American Association for the Advancement of Science. He has served on numerous national and international committees, government panels, as the 2010 APS DAMOP chair, vice-chair of the NAS CAMOS committee and currently serves on the NAS Board of Physics and Astronomy. His research interests are in experimental ultra-fast and strong-field physics. In 1993, he and his collaborators introduced the widely accepted semi-classical model in strong-field physics. His current work is focused on the generation, measurement and application of attosecond x-ray pulses and the study of fundamental scaling of strong field physics.

The seminar will be conducted in person and simulcast via Zoom; it is free and open to the public. Please check the MIPSE website for additional information and requirements for in-person and remote attendance: https://mipse.umich.edu/seminars_2122.php

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Lecture / Discussion Fri, 03 Sep 2021 10:57:53 -0400 2021-10-13T15:30:00-04:00 2021-10-13T16:30:00-04:00 Electrical Engineering and Computer Science Building Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Prof. Louis DiMauro
MIPSE Seminar | A New Regime of HED Physics: Coupling High-Rep-Rate Lasers with Cognitive Simulation (October 20, 2021 3:30pm) https://events.umich.edu/event/86293 86293-21632602@events.umich.edu Event Begins: Wednesday, October 20, 2021 3:30pm
Location: Electrical Engineering and Computer Science Building
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

Abstract:
As high-intensity short-pulse lasers that can operate at high-repetition-rate (HRR) (>10 Hz) come online around the world, the high-energy-density (HED) science they enable will experience a radical paradigm shift. The >103 increase in shot rate over today’s shot-per-hour drivers translates into dramatically faster data acquisition and more experiments, and thus the potential to significantly accelerate the advancement of HED science. However, to fully realize the potential benefits of HRR facilities requires a fundamental shift in how they are operated, and in fact, how the experiments performed on them are designed and executed. Current energetic driver facilities depend on the ability to manually tune the lasers, the targets, the diagnostics settings, and more, between single shots or sets of shots through a manual feedback loop of data collection, data analysis, and optimization largely driven by experience and intuition. At 10 Hz, this paradigm is no longer sustainable as more complex data is collected more quickly than is possible to analyze manually. Simultaneously, on-the-fly optimization of experiments will become ever more crucial as higher repetition rates will lead to more deliberate inter-shot variations and the improved operational range to allow exploration over larger regions of phase space. Consequently, it is likely that the next generation of laser facilities will be limited not by their hardware but by our ability to use that hardware effectively. We will present the vision and ongoing work to realize a HRR framework for rapidly delivered optimal experiments coupled to cognitive simulation to provide new insights in HED science.

About the Speaker: Dr. Tammy Ma is the Advanced Photon Technologies Program Element Leader for High-Intensity Laser High Energy Density (HED) Science within NIF & Photon Sciences at the Lawrence Livermore National Lab. Her group pioneers use of the highest intensity lasers in the world to investigate novel high energy density states of matter, generate energetic beams of particles, study laboratory astrophysics, and explore fusion physics. Dr. Ma graduated with a B.S. from the California Institute of Technology, and received her M.S. and Ph.D. from the U of California at San Diego. She has authored or co-authored over 185 refereed journal publications, and currently sits on the Fusion Energy Sciences Advisory Committee (FESAC), providing advice to the U.S. DOE’s Office of Science on issues related to fusion energy and plasma research. She is the recipient of the Presidential Early Career Award for Science and Engineering (PECASE), the APS Thomas H. Stix Award for her work in quantifying hydrodynamic in-stability mix in ICF implosions, and the DOE Early Career Research Award. She currently also serves as LLNL’s Deputy Director for Laboratory Directed Research & Development (LDRD) Program.

The seminar will be conducted in person and simulcast via Zoom; it is free and open to the public. Please check the MIPSE website for additional information and requirements for in-person and remote attendance: https://mipse.umich.edu/seminars_2122.php

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Lecture / Discussion Fri, 03 Sep 2021 11:30:42 -0400 2021-10-20T15:30:00-04:00 2021-10-20T16:30:00-04:00 Electrical Engineering and Computer Science Building Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Dr. Tammy Ma
MIPSE Seminar | Physics Impacts to Plasma Wave Thruster Design (November 3, 2021 3:30pm) https://events.umich.edu/event/86296 86296-21632604@events.umich.edu Event Begins: Wednesday, November 3, 2021 3:30pm
Location: Electrical Engineering and Computer Science Building
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

Abstract:
The allure of electrodeless, rf based thrusters is fairly obvious in the abstract: long life due to no electrode sputtering, multi-propellant operation (in some cases), higher plasma density. Examples include capacitive, inductive, and wave-based thrusters. Generally, the fundamental application of these concepts is an rf heated plasma, expanded through a divergent magnetic nozzle. When a wave is proposed as the plasma generation mechanism, certain physical parameters are proscribed by the dispersion relation, which serves to relate plasma parameters to the thruster design. Some considerations of these impacts on plasma sources can be examined in basic models of the wave dispersion, absorption, and coupling. The conservation laws in these sources provide additional constraints. The interaction of these phenomena will be discussed from a modeling and experimental perspective for a helicon source in terms of the scaling of density with power, geometry, and coupling, with implications for wave-based thrusters.

About the Speaker:
Dr. James Gilland is a Senior Scientist at the Ohio Aerospace Institute, specializing in advanced plasma propulsion (300 W to 300 MW), including Hall thrusters (HTs), magnetoplasmadynamic thrusters, and plasma wave thrusters. He currently supports NASA Solar Electric Propulsion HT development for the NASA Gateway. Dr. Gilland has performed system and mission analyses of a range of nuclear and solar electric propulsion systems; and served as the Lead Nuclear Electric Propulsion (NEP) Engineer in NASA’s Nuclear Propulsion Office, performing analysis of multimegawatt NEP power and propulsion systems for human space exploration. He is a past NASA Innovative and Advanced Concepts Fellow for his work on propellantless propulsion using Alfven plasma waves. He served on the NASEM panel for Space Nuclear Propulsion Technologies in 2020, and on several NASA advisory panels, including the High Energy Power & Propulsion Capabilities Roadmap Team. Dr. Gilland has an MS in Aerospace Engr. from Princeton U. and a PhD in Nuclear Engr. & Engr. Physics from U. of Wisconsin.

The seminar will be conducted in person and simulcast via Zoom; it is free and open to the public. Please check the MIPSE website for additional information and requirements for in-person and remote attendance: https://mipse.umich.edu/seminars_2122.php

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Lecture / Discussion Fri, 03 Sep 2021 11:36:48 -0400 2021-11-03T15:30:00-04:00 2021-11-03T16:30:00-04:00 Electrical Engineering and Computer Science Building Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Dr. James Gilland
12th MIPSE Graduate Student Symposium (November 17, 2021 2:00pm) https://events.umich.edu/event/89170 89170-21660817@events.umich.edu Event Begins: Wednesday, November 17, 2021 2:00pm
Location: Electrical Engineering and Computer Science Building
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

The 12th Annual MIPSE Graduate Student Symposium will be held in person. The symposium is an opportunity for students involved in plasma research to present the results of their investigations, learn about the research of their fellow students, and network with MIPSE faculty and staff.

The Symposium will feature a special MIPSE seminar and three student poster sessions. All student posters will be considered for the Best Presentation Award.

Schedule and details: https://mipse.umich.edu/symposium_2021.php

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Conference / Symposium Thu, 11 Nov 2021 11:03:20 -0500 2021-11-17T14:00:00-05:00 2021-11-17T19:00:00-05:00 Electrical Engineering and Computer Science Building Michigan Institute for Plasma Science and Engineering (MIPSE) Conference / Symposium Electrical Engineering and Computer Science Building
MIPSE Seminar | The Plasma-Water Interface: Modern Challenges and New Software Tools (November 17, 2021 3:30pm) https://events.umich.edu/event/86297 86297-21632605@events.umich.edu Event Begins: Wednesday, November 17, 2021 3:30pm
Location: Electrical Engineering and Computer Science Building
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

Abstract:
The interaction of low-temperature plasmas with liquid water is a fundamental problem in many applications, from plasma medicine to chemical processing, and more generally where the generation of reactive oxygen and nitrogen species and/or of solvated electrons is of utmost importance. However, characterization of the plasma-liquid interface presents several challenges, both experimentally and computationally, due to the multiscale and multiphysics nature of the problem. In this seminar we provide an overview of recent modeling developments on plasma-liquid interfaces, presenting the new software package Zapdos-CRANE, based on the MOOSE finite-element framework. We provide a brief overview of the software, showing few case studies of interest. The model was used to study a humid argon DC plasma over a water surface, operated in both cathodic and anodic modes. In this system, one of the reactions of interest is the formation and dissolution of hydroxide (OH) radicals, which subsequently produce hydrogen peroxide. The model allows the investigation of the main plasma-chemistry reaction mechanisms for peroxide production with the plasma. The analysis reveals that hydrogen peroxide is increased during anodic plasma treatment due to elevated water vapor dissociation reactions near the interface. Finally, the role of solvated electrons generated during cathodic plasma operations is discussed, showing how they directly degrade hydrogen peroxide in the aqueous phase, inhibiting its accumulation.

About the Speaker:
Davide Curreli is Associate Professor in the Department of Nuclear, Plasma, and Radiological Engineering at the University of Illinois Urbana-Champaign, and at the National Center for Supercomputing Applications. Dr. Curreli leads the Laboratory for Computational Plasma Physics at Illinois. His research activities focus on computational modeling of plasma material interactions and plasma chemistry of low-temperature plasmas for fusion and nuclear applications. Among his current research activities, Dr. Curreli is coordinator of the Nuclear Fireball Plasma Chemistry activities within the University Research Alliance funded by DOD DTRA. His group actively works on multiple projects in Fusion Energy Sciences. Dr. Curreli is Donald Biggar Willett Faculty Scholar at the University of Illinois.

The seminar will be conducted in person and simulcast via Zoom; it is free and open to the public. Please check the MIPSE website for additional information and requirements for in-person and remote attendance: https://mipse.umich.edu/seminars_2122.php

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Lecture / Discussion Fri, 03 Sep 2021 11:44:13 -0400 2021-11-17T15:30:00-05:00 2021-11-17T16:30:00-05:00 Electrical Engineering and Computer Science Building Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Prof. Davide Curreli
MIPSE Seminar | Dynamics of Low Temperature Magnetized Plasmas: Self-Organization and Anomalous Electron Transport (December 8, 2021 3:30pm) https://events.umich.edu/event/86298 86298-21632606@events.umich.edu Event Begins: Wednesday, December 8, 2021 3:30pm
Location: Electrical Engineering and Computer Science Building
Organized By: Michigan Institute for Plasma Science and Engineering (MIPSE)

Abstract:
Low-temperature magnetized plasmas are found in many systems, including plasma processing, space weather, and spacecraft propulsion. Two phenomena that are poorly understood in cross-electric and magnetic field plasma sources, such as magnetrons and Hall effect thrusters, are: (i) self-organized structures and (ii) anomalous electron transport across the magnetic field lines. In this talk, I will present the development of physics-based modeling, including fluid moment models and high-fidelity kinetic models, to address these processes. The fluid moment model coupled with improved boundary condition treatments is applied to low-temperature magnetized plasmas. The particle-based kinetic models are used to investigate multidimensional plasma turbulence initiated by a combination of kinetic instabilities in cross-field configurations. I will also introduce data-driven modeling using optimization and state estimation techniques applied to dynamical plasma systems.

About the Speaker:
Ken Hara is an Assistant Professor of Aeronautics and Astronautics at Stanford University. He received his Ph.D. in Aerospace Engineering and Graduate Certificate in Plasma Science and Engineering from the University of Michigan in 2015, and B.S. and M.S. in Aeronautics and Astronautics from the University of Tokyo in 2008 and 2010, respectively. He was a Visiting Research Physicist at Princeton Plasma Physics Laboratory as a Japan Society for the Promotion of Science Postdoctoral Fellow. He is a recipient of several awards, including the Air Force Young Investigator Program Award, the Department of Energy Early Career Award, and the Office of Naval Research Young Investigator Program Award.

The seminar will be conducted in person and simulcast via Zoom; it is free and open to the public. Please check the MIPSE website for additional information and requirements for in-person and remote attendance: https://mipse.umich.edu/seminars_2122.php

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Lecture / Discussion Fri, 03 Sep 2021 11:49:26 -0400 2021-12-08T15:30:00-05:00 2021-12-08T16:30:00-05:00 Electrical Engineering and Computer Science Building Michigan Institute for Plasma Science and Engineering (MIPSE) Lecture / Discussion Prof. Ken Hara