EMG-4212 / EGPS-4212

EMG-4212 / EGPS-4212



Starting price Basic System – options not included: $61,000

Modular gun with collimated, focusable beam, small spot size, and adjustable beam alignment

Starting price Basic System – options not included: $61,000

Modular gun with collimated, focusable beam, small spot size, and adjustable beam alignment

Categories: ,
Model #: EMG-4212 EGPS-4212


Small Spot Collimated Beam, Alignment During Operation, Higher Current Option

1 keV to 30 keV


  • MBE RHEED Studies
  • Electron Diffraction
  • Space Physics Studies
  • Gas Electron Fluorescence
  • X-ray Generation
  • Heating / Melting / Welding
  • Vacuum Physics Experiments

Features / Options:

  • New Modular Design
  • Internal Alignment During Operation
  • Collimated Beam
  • Small Spot Option down to 100 μm
  • Higher Current Option up to 1 mA
  • Electrostatic Focus and Deflection
  • Computer / Remote Control
  • UHV Compatible and Bakeable
  • Computer / Remote Control
  • Beam Pulsing and Blanking Options
  • User-Replaceable Firing Units

Energy Range: 1 keV to 30 keV
Beam Current / Spot Size:
Standard: 10 nA to 100 µA / Standard: 0.5 mm to 25 mm
Small Spot option: 1 nA to 10 µA / 100 µm to 10 mm
High Current option: 1 µA to 1 mA / High Current option: 1.5 mm to 25 mm
Mounting: 4.5″ CF

The Kimball Physics EMG-4212 Electron Gun, with its matching EGPS-4212 Power Supply, is a multi-purpose modular Electron Gun with applications in many areas. The EMG-4212/ EGPS-4212 is a complete subsystem ready to attach to a user’s vacuum system and turn on. The gun has the capability of producing a collimated, small spot or flood electron beam.

Beam current, beam divergence, and beam energy are all adjustable over wide ranges. The energy can be varied from 1 keV to 30 keV. The beam current and spot size range depend on the system option.  With the various refractory metal disc cathodes, the beam current is independently adjustable from 1 nA to 100 μA. With a small spot option using a lanthanum hexaboride cathode, the gun can deliver spots down to 100 μm. With a high current option, beam currents up to 1 mA can be obtained. Rastering is also available as an option.

The modular design of the EMG-4212 allows either the firing unit assembly or the lens assembly to be replaced. The firing unit cartridge (including the cathode, cathode-mount, andWehnelt aperture) is user-replaceable without removing the entire gun from the vacuum chamber. The anode is also replaceable. The cathode to anode spacing is internally adjustable to vary perveance.

The gun features an adjustable cathode feedthrough assembly that allows mechanical alignment of the firing unit with respect to the anode and the column. This alignment can be done in real-time while the gun is operating at full voltage with beam on. Various stand-alone designs of Faraday cups are available.



Additional information

Weight 5 lbs
Beam current max

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Spot size max

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