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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Instrumentation XII

HK 51.5: Vortrag

Donnerstag, 30. März 2017, 17:45–18:00, F 072

The Gas-Jet Target for MAGIX at MESA — •S. Grieser, D. Bonaventura, C. Hargens, A.-K. Hergemöller, B. Hetz, L. Leßmann, C. Westphälinger, and A. Khoukaz for the MAGIX collaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany

The MAGIX experiment (MESA Gas Internal target eXperiment) will be located in the energy-recovering sector of the future electron accelerator MESA (Mainz Energy-recovering Superconducting Accelerator) at the University of Mainz. There, energies up to 105 MeV with a beam current of 1 mA can be achieved. MAGIX is a fixed-target experiment with high luminosity of 10³⁵ cm²/s , which will consist of a gas-jet target and a multi-purpose spectrometer. The experiment focuses on investigations to verify the Standard Model of particle physics. Thereby, the main interest is the search for dark photons and precision measurements of fundamental constants, e.g. the proton radius. The gas-jet target was designed and built up at the University of Münster. Gas targets continuously provide target material with constant density (e.g. 10¹⁹ atoms/cm² directly behind the nozzle). This gas-jet target offers the possibility to be operated also in a cluster-jet mode. This can be realized by changing the pressure and temperature of the gas at the nozzle. Currently, first measurements for the characterization of the target are done. This includes a construction of a Mach-Zehnder interferometer, which is used to determine the thickness distribution and the shape of the gas-jet. The target design and the results on the beam properties will be presented. Supported by HGS-HIRe.