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3/8 UConn Physics Colloquium (Dr. Andrew Held)
UConn Physics Colloquium (Dr. Andrew Held)
Friday, March 8th, 202403:30 PM - 04:30 PM Gant West BuildingUConn Physics Colloquium: Dr. Andrew Held
High Power Commercial Laser Markets and Applications
Abstract: Ubiquitous and familiar applications for lasers include telecom data transmission, laser surgery (LASIK), information processing (DVD/Blue Ray), supermarket scanners, laser pointers and a multitude of laser sensing applications (LIDAR, range finders, facial recognition, etc.). Sophisticated laser technology is also well-recognized as a key, enabling research tool.Perhaps less well known are the “unsung” commercial applications and markets for higher power lasers. Often out of public view, these laser applications drive diverse and massive commercial markets and are supported by extensive industry-based research and development investments. And are generating increasingly abundant STEM based career opportunities.
The presentation will highlight the laser technologies and applications used in materials processing to mark, engrave, cut, and join everything from shoe leather to sheet metal. Also covered are laser applications supporting the manufacturing of microelectronics-based consumer technology, enabling higher performing devices and ever larger displays. The laser technology and developments that support emerging Directed Energy military applications will be also be reviewed.
Bio:
Andrew Held has recently retired as Senior Vice President of Coherent’ s Aerospace and Defense business. Andrew has over 30 years’ experience in General Business Management, Research, Sales and Marketing of lasers and photonics into a broad range of markets and applications. He received his B.S. in Chemistry and Ph.D. in Laser Spectroscopy from the University of Pittsburgh and was an Alexander von Humboldt Research Fellow at the Technical University in Munich.
Contact Information:Host: Zhanna Rodnova
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3/11 Atomic, Molecular, and Optical Physics Seminar
Atomic, Molecular, and Optical Physics Seminar
Monday, March 11th, 202403:30 PM - 04:30 PM GS-119Dr. François Légaré, Institut national de la recherche scientifique, Energy Materials Télécommunications center
Ultrafast IR/mid-IR laser technologies and their applications at ALLS
The Advanced Laser Light Source (ALLS) is a unique user facility located at INRS-EMT (Varennes, Canada) counting on 40M CDN$ of investment since 2002. Since 2019, this facility has jointed the LaserNetUS network and is now funded as a national research infrastructure by the Canada Foundation for Innovation – Major Science Initiatives. These fundings ease access to the facility for academic and government users. In the first part of my talk, I will give an overview of the facility’s capabilities including the most powerful laser in Canada with 750 TW. In the second part, I will discuss novel approaches developed by my team for the generation of ultrashort pulses in the IR and mid-IR spectral range. This includes multidimensional solitary states in hollow core fibers [1,2] as well as using the frequency domain optical parametric amplification for the generation of tunable CEP stable mid-IR laser pulses [3,4]. Pulse characterization in the mid-IR spectral range will be presented [5]. Finally, I will present recent results on the generation of high-dose MeV electrons from tight focussing in air [6].
References
[1] R. Safaei, G. Fan, O. Kwon, K. Légaré, P. Lassonde, B. E. Schmidt, H. Ibrahim, and F. Légaré (2020), High-energy multidimensional solitary states in hollow core fiber, Nature Phot. 14, 733-739.
[2] L. Arias, A. Longa, G. Jargot, A. Pomerleau, P. Lassonde, G. Fan, R. Safaei, P. Corkum, F. Boschini, H. Ibrahim, and F. Légaré, Few-cycle Yb laser source at 20 kHz using multidimensional solitary states in hollow-core fibers, Opt. Lett. 47, 3612-3615 (2022).
[3] A. Leblanc, G. Dalla-Barba, P. Lassonde, A. Laramée, B. Schmidt, E. Cormier, H. Ibrahim, and F. Légaré (2020), High-field mid-infrared pulses derived from frequency domain optical parametric amplification, Opt. Lett. 45, 2267-2270.
[4] G. Dalla-Barba, G. Jargot, P. Lassonde, S. Tóth, E. Haddad, F. Boschini, J. Delagnes, A. Leblanc, H. Ibrahim, E. Cormier, and F. Légaré, Mid-infrared frequency domain optical parametric amplifier, Opt. Express 31, 14954-14964 (2023).
[5] A. Leblanc, P. Lassonde, S. Petit, J.-C. Delagnes, E. Haddad, G. Ernotte, M. R. Bionta, V. Gruson, B. E. Schmidt, H. Ibrahim, E. Cormier, and F. Légaré (2019), Phase-matching-free pulse retrieval based on transient absorption in solids, Opt. Express 27, 28998.
[6] S. Vallières, J. Powell, T. Connell, M. Evans, M. Lytova, F. Fillion-Gourdeau, S. Fourmaux, S. Payeur, P. Lassonde, S. MacLean, and F. Légaré, High Dose-Rate MeV Electron Beam from a Tightly-Focused Femtosecond IR Laser in Ambient Air (2024), Laser Photonics Rev. 18, 2300078.
François Légaré is a chemical physicist who specializes in developing novel approaches for ultrafast science and technologies, as well as biomedical imaging with nonlinear optics (Ph.D. in chemistry, 2004 – co-supervised by Profs. André D. Bandrauk and Paul B. Corkum). Full professor (2013 - …) at the Energy Materials Telecommunications center of the Institut national de la recherche scientifique (INRS-EMT), he was the director of the Advanced Laser Light Source (ALLS) until 2023. Since 2022, he is the director of the INRS-EMT center and CEO of ALLS. Under his scientific leadership, INRS has received in 2017 a grant of 13.9M CDN$ from the Canada Foundation for Innovation and the Quebec government, with 11.9M CDN$ to upscale the ALLS facility with high average power Ytterbium laser systems and advanced instrumentation for time-resolved material characterization. He is a Fellow and senior member of OPTICA and Fellow of the American Physical Society. He is a member of The College of New Scholars, Artists and Scientists of the Royal Society of Canada (2017). He was awarded the Herzberg medal from the Canadian Association of Physics in 2015 and the Rutherford Memorial Medal in physics of the Royal Society of Canada in 2016. He has contributed to about 200 articles in peer reviewed journals including prestigious ones such as Nature, Science, Nature Photonics, Nature Physics, Nature Communications, and Physical Review Letters. According to Google Scholar, his h-index is 59 with more than 13,000 citations.
Contact Information:Prof. A.-T. Le
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3/18 Dr. Riccardo Longo, University of Illinois (Nuclear Physics Seminar)
Dr. Riccardo Longo, University of Illinois (Nuclear Physics Seminar)
Monday, March 18th, 202402:00 PM - 03:00 PM Gant South BuildingDr. Riccardo Longo, University of Illinois Urbana-Champaign
Title: Probing Hot & Cold QCD Phenomena Using Jets
Abstract:The LHC Heavy Ion program offers unique opportunities to study Quantum Chromodynamics (QCD) phenomena at various length and temperature scales. In particular, dijets are fantastic probes for exploring emergent QCD properties in different regimes. Hadronic Pb+Pb collisions create a hot and dense medium composed of quarks and gluons, the Quark Gluon Plasma (QGP). Dijets produced by a hard-scattering can be used to investigate the microscopic properties of this nearly perfect fluid. Conversely, measuring dijets in p+Pb collisions allows for studying different proton size configurations and cold nuclear effects that modify the nucleon Parton Distribution Functions (PDFs) when bound into atomic nuclei. Studies to inform nuclear PDF (nPDF) parametrization can also be carried out by analyzing dijets produced in photo-nuclear events, allowing for investigating a unique kinematic regime. Other aspects of the nucleon structure, such as its spin composition, are studied at CERN fixed target experiments by performing polarized DIS and Drell-Yan measurements. In my talk, I will discuss selected aspects of hot and cold QCD addressed by the ATLAS Heavy Ion and COMPASS experiment programs. In particular, I will present recent dijet measurements in p+Pb and Pb+Pb collisions at ATLAS and recent COMPASS polarized Semi-Inclusive DIS and Drell-Yan results.
Finally, I will show how the cold QCD effort will naturally continue in the research avenues that the Electron-Ion Collider will open.
Contact Information:Prof. Andrew Puckett
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3/19 Dr. Jaspreet Singh Randhawa, Los Alamos National Laboratory (Nuclear Physics Seminar)
Dr. Jaspreet Singh Randhawa, Los Alamos National Laboratory (Nuclear Physics Seminar)
Tuesday, March 19th, 202402:00 PM - 03:00 PM Gant South BuildingDr. Jaspreet Singh Randhawa, Los Alamos National Laboratory
Title: Nuclear reaction studies to decode the observations from neutron stars in binary systems
Abstract: Neutron stars are ideal astrophysical laboratories to test theories of dense matter physics as they may exhibit most exotic forms of matter, and are pivotal in driving nucleosynthesis in various explosive astrophysical environments; e.g X-ray binaries, neutron star mergers. Breath-taking multi-messenger observations of explosive astronomical events are generating exciting new challenges for nuclear physics and force a rethinking of old paradigms. For X-ray binaries, surface nuclear burning proceeds through extremely proton-rich nuclei powering the X-ray bursts, whereas in neutron star mergers nucleosynthesis proceeds through very neutron-rich nuclei. Therefore, to understand the energy generation and nucleosynthesis in these extreme environments, new nuclear data on very exotic nuclei is required, e.g. nuclear reaction rates or detailed nuclear structure/properties of exotic nuclei. Facility for Rare Isotope Beams (FRIB), a newly developed world’s leading radioactive ion beam facility, will provide an unprecedented access to the very exotic proton-rich and neutron-rich nuclei. In this talk, I will highlight the need for new nuclear physics data to decode observations from X-ray binaries and neutron star mergers, and how FRIB is opening up a new window to explore the most exotic nuclei on earth, to provide much-needed data to facilitate model-observation comparison of various astrophysical environments. I will present the new results from on-going reaction studies at FRIB, and will discuss planned measurements, which will help us to answer some of the most important questions in nuclear astrophysics.Contact Information:Prof. Andrew Puckett
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3/20 Dr. Wenliang Li, Stony Brook University (Nuclear Physics Seminar)
Dr. Wenliang Li, Stony Brook University (Nuclear Physics Seminar)
Wednesday, March 20th, 202402:00 PM - 03:00 PM Gant South BuildingDr. Wenliang Li, Stony Brook University
Title: Probing Proton’s Identity using the Electron-Ion Collider
Abstract:
The Electron-Ion Collider, being constructed at the Brookhaven National Lab, is the “dream machine” for nuclear physics studies for the upcoming decades. The diverse capability in the accelerator design offers physicists a unique opportunity to study quark and gluon structures within nucleons and nuclei. Furthermore, the production and detection of the rare isotopes is a possibility.
In this seminar, we will dive into two examples of many creative ways to use the EIC. 1. Probing the proton’s identity (baryon number), and determining who carries the baryon number within its wavefunction: gluon? quark? Both? 2. EIC can collide the electron beam on an ion beam with any atomic mass, could we use it to create and study the rare isotope (via eA collision) to complement the low-energy studies at FRIB?Contact Information:Prof. Andrew Puckett
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3/21 Dr. Adam Freese, Thomas Jefferson National Accelerator Facility (Nuclear Physics Seminar)
Dr. Adam Freese, Thomas Jefferson National Accelerator Facility (Nuclear Physics Seminar)
Thursday, March 21st, 202402:00 PM - 03:00 PM Gant South BuildingDr. Adam Freese, Jefferson Lab
Title: Relativistic mass densities: from the light front to generalized parton distributions
Abstract: The dynamical generation of mass is one of the most fascinating aspects of quantum chromodynamics. Partonic imaging allows us to probe where this generated mass is, and to break it down into contributions from quarks and gluons. In particular, imaging gives us access to generalized parton distributions, which provide a relativistic three-dimensional picture of the proton’s internal structure, in terms of two spatial dimensions and a momentum faction x. In this talk, I examine how the light front provides a means of rigorously describing spatial distributions for relativistic systems (such as the proton), how the energy-momentum tensor provides distributions of energy and momentum, and how x-weighted moments of generalized parton distributions give us the most promising empirical means of accessing the mass distribution in the proton. I will review challenges in empirically accessing the GPDs, as well as ongoing efforts to address these challenges.Contact Information:Prof. Andrew Puckett
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3/22 Graduate student seminar
Graduate student seminar
Friday, March 22nd, 202412:15 PM - 01:15 PM Gant South BuildingProf. Moshe Gai and Grad. Student Deran Schweitzer, Department of Physics, University of Connecticut
Stellar Evolution: Supernovae
Contact Information:Prof. Ilya Sochnikov
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3/22 Dr. James Cryan, SLAC National Lab (UConn Physics Colloquium)
Dr. James Cryan, SLAC National Lab (UConn Physics Colloquium)
Friday, March 22nd, 202403:30 PM - 04:30 PM Gant West BuildingDr. James Cryan, SLAC National Lab (UConn Physics Colloquium)
Ultrafast dynamics using X-ray attosecond pulses.
Contact: Prof. Nora BerrahContact Information:Prof. Nora Berrah
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3/25 Dr. Andrey Tarasov, North Carolina State University (Nuclear Physics Seminar)
Dr. Andrey Tarasov, North Carolina State University (Nuclear Physics Seminar)
Monday, March 25th, 202402:00 PM - 03:00 PM Gant South BuildingDr. Andrey Tarasov, North Carolina State University
Title: Hadron as a many-body parton system: from parton interactions to non-perturbative phenomena
Due to the phenomenon of confinement, the hadron cannot be understood as a compound state of independent quarks and gluons but rather represents a strongly bounded many-body parton system. The dynamics of this system gives rise to such fundamental properties of the hadron as spin and mass. How the spin and mass of the hadron arise from the parton dynamics is an outstanding question of modern nuclear science. The parton dynamics can be probed in high-energy scattering experiments using the factorization approach. However, there is a wide class of observables that cannot be described within the conventional factorization schemes due to various reasons, including non-perturbative phenomena. In my talk, I will give several concrete examples and propose a solution based on applying the background field techniques, which provide a unified treatment of parton interactions. I will argue that the application of such techniques allows us to obtain a complete picture of the multi-parton dynamics in QCD and shed light on the origin of the proton spin and mass.Contact Information:Prof. Andrew Puckett
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3/26 Dr. Shohini Bhattacharya, Los Alamos National Laboratory (Nuclear Physics Seminar)
Dr. Shohini Bhattacharya, Los Alamos National Laboratory (Nuclear Physics Seminar)
Tuesday, March 26th, 202402:00 PM - 03:00 PM Gant South BuildingTitle: A comprehensive insight into nucleons at the Electron-Ion Collider
Abstract:
Quantum Chromodynamics (QCD) is the theory governing the strong interactions that bind quarks and gluons, collectively known as partons, to form nucleons - the fundamental building blocks of visible matter. Achieving a profound understanding of the partonic structure of nucleons stands as a crucial milestone, and the forthcoming Electron-Ion Collider (EIC) at the Brookhaven National Laboratory is poised to be the ultimate tool in nuclear physics for this purpose. In this talk, I will explore a few of my research endeavors, aiming to address key questions such as, “How can we measure the orbital motion of partons within nucleons?” and “How can we uncover quantum anomalies in the distributions of partons within nucleons, and what can we learn from them?” The state-of-the-art theory discussed in this talk plays a pivotal role in providing comprehensive insight into nucleons, exploring the origins of spin, mass, and symmetry breakings - all of which form the bedrock of QCD and the EIC.Contact Information:Prof. Andrew Puckett
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3/29 Dr. Nick Hutzler, California Institute of Technology (UConn Physics Colloquium)
Dr. Nick Hutzler, California Institute of Technology (UConn Physics Colloquium)
Friday, March 29th, 202403:30 PM - 04:30 PM Gant West BuildingDr. Nick Hutzler, California Institute of Technology
UConn Physics Colloquium
Title and abstract: TBD
Contact: Profs. Tom Blum and Dan McCarronContact Information:Prof. Tom Blum
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Prof. Dan McCarron
See also UCONN physics event calendar and all upcoming UCONN physics events list.