A wire tension meter has been developed for the multiwire chambers of the LHCb muon detector. The wire tension is deduced from its mechanical resonance frequency. In the LHCb muon chambers, the wires are electrically connected in group of 14, so that the wire excitation method based on the interaction between a current sent into a wire and an external magnetic field is difficult to be used. In our system the wire under test is forced to oscillate by a periodic potential difference 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 optimized. In the range 0.4 - 1 N a very good agreement was found between the mechanical tension measured by this system and by a dynamometer.
A wire tension meter for the LHCb muon chambers / A., Buccheri; E., Dane; A., Frenkel; G., Martellotti; A., Medvedkov; A., Pelosi; Penso, Gianni; D., Pinci; G., Pirozzi; R., Dumps; M., Dwuznik; A., Kachtchouk; B., Schmidt; G., Felici; C., Forti; V. V., Kulikov; A., Nedosekin. - 2:(2004), pp. 598-602. (Intervento presentato al convegno 8th International Conference on Advanced Technology and Particle Physics tenutosi a Lake Como, ITALY nel OCT 06-10, 2003) [10.1142/9789812702708_0088].
A wire tension meter for the LHCb muon chambers
PENSO, Gianni;
2004
Abstract
A wire tension meter has been developed for the multiwire chambers of the LHCb muon detector. The wire tension is deduced from its mechanical resonance frequency. In the LHCb muon chambers, the wires are electrically connected in group of 14, so that the wire excitation method based on the interaction between a current sent into a wire and an external magnetic field is difficult to be used. In our system the wire under test is forced to oscillate by a periodic potential difference 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 optimized. In the range 0.4 - 1 N a very good agreement was found between the mechanical tension measured by this system and by a dynamometer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
