EMG-4212 / EGPS-3212

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Description

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

1 keV to 20 keV

Applications:

• 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
• User-Replaceable Firing Units
• UHV Compatible and Bakeable
• Computer / Remote Control
• Beam Pulsing and Blanking Options

Energy Range: 1 keV to 20 keV
Beam current / Spot sizes:
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-3212 Power Supply, is a multi-purpose modular Electron Gun with applications in many areas. The EMG-4212/ EGPS-3212 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 20 keV. The beam current and spot size range depend on the system option. With the standard 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. Beam blanking and rastering are also available as options.

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, and Wehnelt 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 the 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.