VWM flyer v2-1 (TEXTE) · Beam transverse profile and position Beam Halo measurement 5-wire sensor 1-wire sensor Front-end electronics box VWM was developed on the basis of Suren

Fixed multi-wire sensor or moving sensorProtons, ions, electrons, photons, neutrons:

Electron beam scan in vacuum• 20 MeV electrons• 70-pA wire-intercepted current resolutioProton beam scan in vacuum• 15 GeV protons• 3-pA wire-intercepted current resolutionPhoton beam scan in vacuum• 14-keV photon mean energy• 1.4E+7 ph/s wire-intercepted flux resolutionPhoton 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 via USBExample software is provided.

VWM system componentsFixed or moving wire sensorTwisted pair cable to Front-end electronicsFront-end electronics box, each supports 2 wire sensorsFront-end to chassis RJ45 cable, up to 50 metersChassis can support up to 6 Front-end electronics.

VWMVibrating Wire MonitorBeam transverse profile and positionBeam Halo measurement

5-wiresensor

1-wire sensor

Front-end electronics box

VWM was developed on the basis of Suren Arutunian Vibrating Wire Scanner.Dr. Arutunian received the Faraday Cup 2008 for this innovation

Principle of operationThe 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. V2.1

SpecificationsFrequency resolution < 0.01 HzThermal resolution per wire materialStainless steel SS 0.3 mKBronze B 0.6 mKTungsten W 1.0 mKDeposited heat power resolution

In vacuum In airStainless steel SS 7E-9 W 1E-6 WBronze B 5E-8 W 2.6E-6 WTungsten W 3E-7 W 5.4E-6 WResponse time In vacuum In airStainless steel SS 20 s 0.23 sBronze B 9 s 0.21 sTungsten W 2 s 0.16 s

One-wire VWM sensor, Fork TypeWire holder material: Stainless steelDimensions: 40 mm along the wire

Larger on option

Five-wire VWM sensor for 1 to 5 wiresWire holder material: Stainless steel, ceramicsDimensions: 70 mm along the wire,

diameter 30 mmMass with cable: 260 gCan be rotated around its central axis. At 45 degree rotation:Horizontal aperture: 8 mmVertical aperture: 3 mm

v2.1

Large aperture sensor for halo scanning

Order codesVWM-S1 1-wire sensorVWM-S5 5-wire sensorVWM-LA50 1-wire large aperture scan sensor-SS Stainless steel wire-B Bronze wire-W Tungsten wireVWM-FEE Front-end electronics for 2 wiresVWM-RFC Chassis, housing up to 6 boards,VWM-2WB Board supporting 2 wiresVWM-RJC/xx RJ45 cable Cat.5, max 50m.

bergozInstrumentation

DistributorsU.S.A. : GMW Associates955 Industrial Rd.San Carlos, CA 94070, U.S.A.Fax: (650) 802-8298 - Tel.: (650) 802-8292sales@gmw.com www.gmw.comJapan : REPIC Corporation28-3 Kita Otsuka 1-ChomeToshima-ku, Tokyo 170-0004, JapanFax: 03-3918-5712 - Tel.: 03-3918-5326sales@repic.co.jp www.repic.co.jpManufacturerBERGOZ InstrumentationEspace Allondon Ouest01630 Saint Genis Pouilly, France Fax: +33-450.426.643 - Tel.: +33-450.426.642sales@bergoz.com www.bergoz.com

Wire holder: Stainless steelFree wire length: 50mmBeam aperture: 100 x 50mm