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Calendar of Physics Talks Vienna
| Large-scale, High Current, Radio-Frequency Inductively Coupled Plasma Positive Ion Sources For Fusion Heating Applications |
| Speaker: | Florian M. Laggner (North Carolina State University, Department of Nuclear Engineering, Raleigh, NC/USA) |
| Abstract: | An overview of the current research activities of the Fusion Plasma Auxiliaries Characterization Laboratory (FPAC LAB) at NC Stateâs Department of Nuclear Engineering will be provided. Our mission is to create innovative engineering solutions to sustain, study and optimize fusion plasmas.
To sustain and control a burning plasma, magnetic confinement fusion concepts rely on highly efficient heating and current drive systems. Neutral beam injectors are versatile and widely used but crucially rely on high power ion sources. Radio-frequency inductively coupled plasma sources create high positive ion current densities on the order 1.5 kA/m2. We work on the optimization of these large scale (48 x 12 cm beam size) ion sources towards higher efficiency and operational reliability, leveraging recent advances in solid state radio-frequency generator technology. Our goal is to develop and optimize |
| Date: | Thu, 26.09.2024 |
| Time: | 16:00 |
| Location: | TU Wien, Institut für Angewandte Physik, E134 1040 Wien, Wiedner HauptstraÃe 8-10 Yellow Tower âBâ, 5th floor, SEM.R. DB gelb 05 B |
| Contact: | Prof. Richard WILHELM |
| Generating and detecting entangled atomic states using light |
| Speaker: | Romain Bachelard (Federal University of Sao Carlos) |
| Abstract: | Light is a powerful tool to manipulate atoms, but it also allows to create correlations between them. This can be achieved in optical cavities where the interaction through specific light modes is favored, or in free space where dipole-dipole interactions emerge from the continuum of electromagnetic modes available to the emitters. This coupling does not only allow for photon exchange between the atoms, but it also manifests in a cooperative spontaneous emission phenomenon. Introduced by Dicke in the 50', superradiance has since then been reported in many fields well beyond atomic physics.
I here focus on the dark side of superradiance, that is, subradiance. These very slow decaying modes correspond to non-symmetric atomic modes which couple weakly to the surrounding electromagnetic vacuum modes, and allow one to preserve the excitations stored over long times in the atomic ensembles... |
| Date: | Fri, 27.09.2024 |
| Time: | 11:00 |
| Duration: | 45 min |
| Location: | IQOQI Seminar room, 2nd floor |
| Contact: | Uros Delic |
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