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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Instrumentation IV

HK 18.6: Vortrag

Dienstag, 17. März 2026, 17:30–17:45, PHIL B 302

The cryogenic windowless jet target for e-p scattering experiments at MAGIX at MESA — •Liridon Deda, Philipp Brand, Jost Froning, and Alfons Khoukaz — Institut für Kernphysik, Universität Münster, 48149 Münster, Germany

MAGIX experiment will provide a versatile physics program, ranging from studies of baryonic matter structure to searches for dark sector particles. By combining the high-intensity, energy-recovering electron beam of MESA with a state-of-the-art windowless jet target, MAGIX aims to perform high-precision e-p scattering experiments without target background. The MAGIX jet target is designed to be operated with various gases, including hydrogen, helium, and almost all heavier gases. A target thickness of more than 10¹⁸ atoms/cm² is delivered at the interaction point when using hydrogen. Achieving such high target thickness requires a high gas flow rate at cryogenic temperatures, which is then pressed through a de Laval nozzle. The nozzle geometry defines how the target expands, thus numerical simulations of the jet’s formation and propagation are necessary to understand and optimize the target performance. In this contribution, the setup, performance, and development of the MAGIX jet target including various simulations for different gases will be presented and discussed. Additionally, the adaptation for the generation of a frozen filament jet structure will be described.

This project has received funding from CRC1660 (project number 514321794).

Keywords: Jet target; MAGIX experiment; Filament jet structure; Numerical simulations; Nozzle geometry