The VWM is based on the wire resonant frequency dependence on its tension, itself dependent on its temperature. A positive feedback oscillator excites the wire oscillations at this resonant frequency. Particles penetrating the wire heat it, change its tension and therefore its resonant frequency. Vibrating wire sensors have been applied to electron, proton, ion and photon beams. VWM can be used for neutron beams too.
VWM system components
VWM 1-wire Sensor
Twisted pair cable from Sensor to Front-End Electronics
Front-End Electronics box, each supports 2 Sensors
Front-end to chassis RJ45 cable, up to 50 meters
Chassis, can support up to 6 Front-End Electronics