Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 59: Instrumentation XV

HK 59.4: Vortrag

Donnerstag, 31. März 2022, 15:00–15:15, HK-H4

A prototype for hydrogen-based droplet targets for nuclear and particle physics experiments — •Christian Mannweiler, Daniel Bonaventura, and Alfons Khoukaz — Westfälische Wilhelms Universität, Münster, Germany

Internal target experiments play an important role in in particle physics research. For example, the PANDA experiment at the future HESR accelerator at FAIR will use both a hydrogen cluster-jet target and a hydrogen pellet target.

Another target technology which is closely related to the pellet target is the droplet target. The operating principle of a hydrogen droplet target is to squeeze cryogenically cooled, fluid hydrogen through a small nozzle of, e.g. 10 microns. A piezo actor induces vibrations on the nozzle, causing the hydrogen beam passing through the nozzle to break up. Depending on the nozzle diameter and the piezo frequency, a droplet beam with a diameter of around 20 microns is created. Currently, there are several challenges concerning this technology, chiefly the issue of nozzle clogging, which occurs routinely and hinders the stable long-term operation of such targets.

To combat this issue and improve the overall performance of droplet targets, a new prototype droplet target was recently constructed and commissioned at the WWU Münster. It will be used to tackle the aforementioned nozzle clogging issue as well as other challenges.

In our contribution we will present the new target prototype and its capabilities as well as first results. This project has received funding from the EU Horizon 2020 programme (824093).