A Simple Technique for Measuring Axial Displacement in Stretched-Wire Alignment Systems
نویسنده
چکیده
A method is described for determining axial displacement along a stretched wire by driving both ends of a resistive wire as a bi-directional voltage divider and measuring the local signal balance with a capacitive pickup. Such a system has been constructed, and test results are presented, along with the details of the electronics and apparatus, plus a description of the intended application of this technology in the GEM muon system. The factors limiting the measurement resolution are discussed, and suggestions are given to improve performance. In addition, the wire readout electronics are shown to be able to accurately monitor the mechanical resonance in a stretched wire, enabling the wire sag to be determined.
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