Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session H07: Extreme Light-matter Interactions for Exploring Fundamental PhysicsInvited Live Streamed
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Sponsoring Units: DAMOP Chair: Derek Jackson Kimball, California State University - East Bay Room: Salon 4 |
Sunday, April 10, 2022 10:45AM - 11:21AM |
H07.00001: Ultra-intense laser matter interaction experiments at the University of Michigan Invited Speaker: Karl M Krushelnick
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Sunday, April 10, 2022 11:21AM - 11:57AM |
H07.00002: Development of x-ray sources driven by laser wavefield acceleration at LaserNetUS facilities Invited Speaker: Felicie Albert Bright sources of x-rays, such as synchrotrons and x-ray free electron lasers (XFEL) are transformational tools for many fields of science. They are used for biology, material science, medicine, or industry. Such sources rely on conventional particle accelerators, where electrons are accelerated to gigaelectronvolts (GeV) energies. The accelerating particles are also wiggled in magnetic structures to emit x-ray radiation that is commonly used for molecular crystallography, fluorescence studies, chemical analysis, medical imaging, and many other applications. One of the drawbacks of synchrotrons and XFELs is their size and cost, because electric field gradients are limited to about a few 10s of MeV/M in conventional accelerators. |
Sunday, April 10, 2022 11:57AM - 12:33PM |
H07.00003: Light-matter interactions at extreme intensities and densities: reaching the Schwinger limit Invited Speaker: Sebastian Meuren Due to the smallness of the fine-structure constant alpha the perturbative sector of quantum electrodynamics (QED) is well understood. In the presence of strong electromagnetic fields, however, the photon density can become so large that it compensates for the suppression induced by alpha and nonperturbative effects are predicted to occur. In this sector ab-initio calculations become intractable, commonly applied approximations are experimentally untested, and, eventually, a complete breakdown of perturbation theory is conjectured. Such conditions exist close to enigmatic astrophysical objects like magnetars or during some of the most violent cosmic events like neutron-star mergers. The Experiment 320 at SLAC's FACET-II aims at probing the strong-field sector of QED in electron-laser collisions. Due to the large Lorentz boost of the 10-13 GeV electron beam E-320 will be able to probe the QED critical (Schwinger) field in the beam rest frame even with a moderate 10 TW-class near infrared laser. The talk will give an introduction into strong-field QED and its relation to other scientific fields such as strong-field atomic physics, laser-plasma interactions in the QED regime, next-generation linear lepton collider, and astrophysics; it will present the current status of E-320 (initial-stage commissioning completed and ready for first beamtime), its relation to other planned experiments, and outline possible future directions of the field. |
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