Vibrating wire monitor - Bergoz Instrumentation - #1

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Transverse profile and position monitor Fixed multi-wire sensor or moving sensor For beams: Photon from infrared to keV, Electron, proton from keV to GeV and Neutrons VWM application examples: Electron beam scan in vacuum • 20 MeV electrons • 70-pA wire-intercepted current resolution Proton beam scan in vacuum • 15 GeV protons • 3-pA wire-intercepted current resolution Photon beam scan in vacuum • 14-keV photon mean energy • 1.4E+7 ph/s wire-intercepted flux resolution Photon beam scan in air • 100-keV photon mean energy • 3E+13 ph/s wire-intercepted flux resolution Output is digital value proportional to number of particles hitting the wire. Data communication is via USB Example software is provided. Principle of operation The VWM is based on the wire resonant frequency dependance on its tension, itself dependant 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 Fixed or moving wire sensor Twisted pair cable to Front-end electronics Front-end electronics box, each supports 2 wires Electronics to chassis cable, up to 50 meters Chassis can support up to 8 Front-end electronics VWM Vibrating Wire Monitor Beam transverse profile and position The VWM instrument was developed by Bergoz Instrumentation on the basis the Vibrating Wire technology developed by Suren Arutunian of Yerevan Physics Institute. Dr. Arutunian received the Faraday Cup 2009 for this innovative development