Erlangen 2026 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Instrumentation III

HK 17.4: Talk

Tuesday, March 17, 2026, 17:15–17:30, PHIL A 301

A New Automatised Wire Tension Measurement for the CBM-TRD Chambers — •Hannes Olbring for the CBM collaboration — Institut für Kernphysik, Universität Münster

At the Facility for Antiproton and Ion Research (FAIR) in Darmstadt the Compressed Baryonic Matter (CBM) experiment is currently being built. The goal of the experiment is to study the QCD phase diagram at high net baryon densities using heavy ion collisions at interaction rates of up to 10 MHz.
The Transition Radiation Detector (TRD) of CBM is based on Multi-wire Proportional Chambers (MWPCs). The wire electrodes of the MWPCs will be produced with a well-controlled mechanical wire tension, dictated by the requirements on the electrostatic deflection caused by high voltages applied to the wires. To check the proper tension prior and after the wire gluing, a wire tension measurement device needs to be built. The wires will be brought to (harmonic) oscillation by an air blast, such that the actual measurement of the tension can be achieved by measuring the oscillation frequency. This talk will focus on commissioning and first performance measurements of a newly constructed wire tension measurement device and its automatisation.
We thank our colleagues from IFIN-HH, Măgurele, Romania, in particular Marian Olteanu, for the collaboration on developing this new device. This work is supported by BMFTR grant 05P24PM1.

Keywords: CBM; TRD; MWPC; Quality Assurance