Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Poster
HK 27.91: Poster
Dienstag, 28. März 2017, 16:45–18:45, F Foyer
Magnetically driven piston pump for the XENON1T experiment — •Denny Schulte, Axel Buss, Alexander Figuth, Christian Huhmann, Michael Murra, Hans-Werner Ortjohann, and Christian Weinheimer — Westfälische Wilhelms-Universität, Münster, Germany
The XENON1T experiment, constructed in the Laboratori Nationali del Gran Sasso (LNGS) in Italy, uses a dual-phase xenon Time Projection Chamber (TPC) for the direct detection of the Weakly Interacting Massive Particle (WIMP). The TPC is filled with pure xenon and is geared towards scattering of WIMPs with xenon nuclei. In order to reach the desired high sensitivity of 2·10−47 cm2 for a 50 GeV/c2 WIMP, a high purity of the xenon is crucial. According to that, the xenon has to be kept extremely clean of electro-negative impurities and radioactive backgrounds. For this purpose, the xenon must be continously circulated through the purification system. Therefore, a convenient pump out of high purity components, e.g. for a low radon emanation, has been developed in Münster in cooperation with the nEXO group at Stanford University and the nEXO/XENON group at Rensselaer Polytechnic Institute. With this pump both extremely cleanness and saveness with respect to contamination of the xenon can be reached by the magnetically driven piston and the hermetically sealing. This poster will deal with the current status of this magnetically driven piston pump and the set of problems in longterm stability represented by heat evolution and gasket design. This project is supported by BMBF under contract 05A14PM1.