Faraday cups are used for measuring electrical currents of charged particle beams in real time in broad pressure ranges, down to ultra-high vacuum conditions.
The Faraday cup is equipped with a suppressor electrode for compensation of secondary electron emission.
They can be used for currents of fA up to mA at beam power loads of up to 30 W.
| category | charged particle beam diagnostics |
| measured quantity | charged particle beam charge/current |
| maximum beam power | up to 30 W with passive cooling; higher beam power possible with active cooling |
| current measurement range | fA up to mA |
| pressure operating range | down to 1·10-10 mbar |
| mounting flange | fixed: DN63 CF or larger, other flanges on request; movable: DN40 CF or larger, other flanges on request |
| connections | BNC connector |
| aperture dimensions | 1 mm up to 30 mm |
| maximum bakeout temperature | 150 °C |
| approx. box size (length x width x height) | 260 mm x 152 mm x 460 mm (DN100 CF flange) |
Special Features
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fixed installation or solutions with a linear feedthrough featuring manual or motorized positioning systems
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apertures with different diameters (standard up to 30 mm or upon customer request)
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all beam-stressed Faraday cup parts (i.e. aperture, detector etc.) can be made of highly sputter resistant materials (e.g. tungsten, molybdenum) for use with heavy or highly energetic ions
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electrical feedthroughs for all signals and voltages (standard BNC connectors, alternative electric feedthroughs are possible)
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control and measurement software
Optional supplementing devices
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power supply for the suppressor voltage
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current measurement device for ion beam currents of fA up to mA
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active cooling system for higher thermal loads
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further customization possible
