SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 20: Laser Plasmas III/Codes and Modeling III

P 20.3: Vortrag

Donnerstag, 23. März 2023, 18:15–18:30, CHE/0091

Magnetohydrodynamic Simulations of a Tapered Plasma Lens for Optical Matching at the ILC e⁺ Source — •Manuel Formela¹, Gudrid Moortgat-Pick¹, Niclas Hamann¹, Gregor Loisch², Mathis Mewes², Maxence Thévenet², and Jens Osterhoff² — ¹University of Hamburg, Hamburg, Germany — ²Deutsches Elektronen Synchrotron DESY, Hamburg, Germany

The International Linear Collider is a planned electron-positron linear collider with its positron source producing positrons by exposing a target to undulator radiation. The resulting, highly divergent positron beam requires optical matching to improve its luminosity and therefore the success of the collision experiments. Here, optical matching refers to capturing particles, i.e. making them available for downstream beamline elements. In the past, this has been done with sophisticated coils, but recently the usage of a current-carrying plasma, a plasma lens, has been proposed. For the International Linear Collider particle tracking simulations have already concluded with an optimal plasma lens design with respect to the captured positron yield. This design is characterized by a linearly widening radius in beam direction. Now further research and development is required, including both experiments with a prototype set-up as well as simulations modeling the hydrodynamics of the current-carrying plasma and the resulting magnetic field. The accuracy of the latter will benefit greatly from the former. First results of these magnetohydrodynamic simulations are discussed in this work.