Author/Authors :
Ciambrone، نويسنده , , P. and Dané، نويسنده , , E. and Dumps، نويسنده , , R. and Dwuznik، نويسنده , , M. and Felici، نويسنده , , G. and Forti، نويسنده , , C. and Frenkel، نويسنده , , A. and Graulich، نويسنده , , J.-S. and Kachtchouk، نويسنده , , A. and Kulikov، نويسنده , , V.V. and Martellotti، نويسنده , , G. and Medvedkov، نويسنده , , A. and Nedosekin، نويسنده , , A.A. and Penso، نويسنده , , G. and Pinci، نويسنده , , D. and Pirozz، نويسنده ,
Abstract :
A wire tension meter has been developed for the multi-wire proportional chambers of the LHCb muon detector. The wire tension is deduced from its mechanical resonance frequency. In the LHCb muon chambers, the wires are 2 mm apart and electrically connected in groups of 3–32, so that the wire excitation system must be precisely positioned with respect to the wire to be tested. This wire is forced to oscillate by a periodic high voltage applied between that wire and a non-oscillating “sense wire” placed parallel and close to it. This oscillation produces a variation of the capacitance between these two wires which is measured by a high precision digital electronic circuit. At the resonance frequency this capacitance variation is maximum. The system has been systematically investigated and its parameters were optimized. In the range 0.4–1 N a good agreement is found between the mechanical tension measured by this system and by a dynamometer.
Keywords :
Multi-wire proportional chambers , Elementary-particle and nuclear physics experimental methods and instrumentation , Tracking and position-sensitive detectors
