Description
Energy Sweeping: Constant Beam Current and Approximately Constant Spot Size Electron Beam
50 eV to 5 keV
Applications:
- Surface Physics Studies
- Ionization Experiments
- Charge Neutralization
Features / Options:
- Wide Energy Range
- Constant Beam Current
- Constant Spot Size
- Zoom Lens Focusing
- High Speed Pulsing
- Deflection, Rastering
- Computer / Remote Control
Energy Range: 50 eV to 5 keV
Beam Current: 1 nA to 100 µA
Spot Sizes: 1 mm to 10 mm
Mounting: 2.75″CF
Features/Options: Zoom Lens Focusing for Energy Sweeping, Deflection, Rastering, High Speed Pulsing
The Kimball Physics EGL-2022 Electron Gun, with its matching EGPS-2022 Power Supply, has applications in a variety of surface physics, ionization, charge neutralization, and other vacuum physics studies. It is a complete subsystem ready to attach to the user’s vacuum system and turn on.
Beam energy, beam current, and spot size are independently adjustable over wide ranges. The energy is variable from 50 eV to 5 keV and the beam current from 1 nA to 100 μA. By use of multi-staging and a computer-designed electron zoom lens, a constant beam currentis maintained over a two-order-of-magnitude change in energy, with a spot size also roughly constant. The electron gun uses a unipotential cathode to generate a beam of low energy spread.
The gun design can include a positively biased acceleration grid to enhance emission and collimate the beam. A negative potential is typically applied to this grid element to collimate the beam, suppress emission, and cut off the beam.
UHV technology is used throughout. The gun can be run in vacuums from 10-11 torr up to 10-5 torr for the standard Ta disc cathode. The electron gun is bakable to 350°C with cables removed.
To download this PDF and other associated documents, Please visit Resources Tab above.
