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The STAR experiment at RHIC is planning to upgrade the Time ProjectionChamber which lies at the heart of the detector. We have designed an instrumentto measure the tension of the wires in the multi-wire proportional chambers(MWPCs) which will be used in the TPC upgrade. The wire tension measurementsystem causes the wires to vibrate and then it measures the fundamentalfrequency of the oscillation via a laser based optical platform. The platformcan scan the entire wire plane, automatically, in a single run and obtain thewire tension on each wire with high precision. In this paper, the details aboutthe measurement method and the system setup will be described. In addition, thetest results for a prototype MWPC to be used in the STAR-iTPC upgrade will bepresented.

nuclear instruments and methods in physics research. section a, accelerators, spectrometers, detectors and associated equipment/nuclear instruments and methods in physics research. section a, accelerators, spectrometers, detectors and associated equipment

Design and implementation of wire tension measurement system for MWPCs used in the STAR iTPC upgrade