Commissioning, operation, and characterization of a small-scale liquid xenon TPC and R&D studies on single-phase TPC operation

Abstract: The DARWIN experiment aims to operate a Time-Projection-Chamber (TPC) filled with 40 t of liquid xenon to explore the entire parameter space for spin-independent WIMP-nucleon interactions. Scaling the concept of dual-phase TPCs up to DARWIN scales is mechanically highly challenging. An alternative detection approach considers a single-phase TPC, where the charge signal is produced in liquid xenon. The detector platform XeBRA, located at the University of Freiburg operates a small TPC, which provides the opportunity to compare dual-phase and single-phase quantities within the same detector framework. The characterization of the XeBRA TPC as a dual-phase TPC serves as a performance benchmark for a comparison to future single-phase operation. The S2 production in liquid xenon requires strong electric fields, which can be achieved close to thin wires. To operate the XeBRA TPC as single-phase TPC, an anode has been constructed supporting 19 gold-plated tungsten wires with a diameter of 10 um. To test the performance and the stability of the single-phase anode, a simplified TPC has been constructed, keeping the anode aligned in between two grounded electrodes. Besides the stability of the anode during the entire measurement campaign with the developed TPC, we were able to observe S2 signals. The evolution of the S2 signal strength as a function of the applied bias voltage at the wires could be quantified

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: Universität Freiburg, Dissertation, 2021

Classification and Topics

• Keyword: Xenon ; Dunkle Materie ; Zeitprojektionskammer ; Xenon

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2022
• Creator: Meinhardt, Patrick
• Contributor: Schumann, Marc ; Schumann, Marc ; Landgraf, Ulrich ; Albert-Ludwigs-Universität Freiburg. Fakultät für Mathematik und Physik

Further information

• DOI: 10.6094/UNIFR/223920
• URN: urn:nbn:de:bsz:25-freidok-2239208
• Rights: Kein Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 25.03.2025, 1:52 PM CET