Köln 2025 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 59: Instrumentation XIV
HK 59.4: Talk
Thursday, March 13, 2025, 18:15–18:30, SR Exp1B Chemie
Nozzle production and vacuum simulations for the PANDA cluster-jet target — •Michael Weide, Philipp Brand, Sophia Vestrick, Hanna Eick, and Alfons Khoukaz — Institut für Kernphysik, Universität Münster, 48149 Münster, Germany
In antiproton-proton annihilation experiments such as the upcoming PANDA experiment at FAIR, internal targets have a key role as they allow the accelerator beam to be utilized for multiple interactions with the target. Initially, this target will be realized by a cluster-jet target (CJT) operated with H2, that produces clusters of sizes ≤10 microns in diameter.
A challenge of such an experiment is minimizing background reactions due to the costly production of antiprotons, thus good vacuum conditions are mandatory. To study the effect of various residual gas sources such as flash evaporation and beam induced evaporation, vacuum simulations are performed and compared with experimental data.
The core piece of a CJT is a copper Laval nozzle, which was previously produced at CERN. In order to be able to influence the geometry and shape of the nozzle, a manufacturing process is currently being developed at the Institute of Nuclear Physics at the University of Münster. The current status of the process and the first very promising results will be presented.
The research project was supported by EU Horizon 2020 program (824093), BMBF (05P21PMFP1) and NRW Netzwerke (NW21-024-E).
Keywords: Cluster-jet target; Vacuum simulations; Flash evaporation; Cluster bursting; Beam target interaction