Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Instrumentation XVII and Accelerators

HK 60.4: Talk

Friday, March 2, 2018, 15:00–15:15, Audimax H1

Magnetically-coupled piston pump for ultra-clean noble gas experiments — •Denny Schulte — Westfälische Wilhelms-Universität, Münster, Germany

Experiments employing noble gas targets such as xenon and argon make use of the characteristic ionization and scintillation process occurring in case of an interaction. In order to enable high light as well as charge yields, electronegative impurities have to be removed from the inert gas. A continuous circulation through a purification system is indispensable and requires specialized pumps.

For this reason, together with partners from Stanford University and Rensselaer Technical Institute we developed a magnetically-coupled piston pump, which fulfills all important requirements for current as well as future multi-ton and low background experiments (e.g. XENONnT and nEXO) such as absence of oil-based lubrication, ultra-low radon emanation and high performance.

An enhanced magnetic gradient boosts the coupling strength of the piston to 3500 N. Thus, gas flows of more than 200 standard liters per minute and compressions of up to 1.9 bar are possible.

This talk will zoom in on characterization and last upgrades of the pump and is supported by BMBF under contract 05A17PM2.