Description
Energy Sweeping: Constant Beam Current and Approximately Constant Spot Size
NEW LOWER ENERGY RANGE FOR IMPROVED RESOLUTION
1 eV to 2000 eV
Applications:
- Surface Physics Studies
- Electron Stimulated Desorption
- Inverse Photoelectron Emission
- Ionization Experiments
- Charge Neutralization
Features / Options:
- Wide Energy Range
- Very Low Energies
- Constant Beam Current
- Constant Spot Size
- Zoom Lens Focusing
- Demountable Gun
- High Speed Pulsing
- Deflection, Rastering
- Computer/Remote Control
Energy Range: 1 eV to 2 keV
Beam Current: 1 nA to 10 µA
Spot Size: 0.5 mm to 5 mm
Mounting: 2.75″ (2¾CF, demountable option
Features/Options: Zoom Lens Focusing for Energy Sweeping, Deflection, Rastering, High Speed Pulsing
The Kimball Physics ELG-2 Electron Gun, with its matching EGPS-1022 Power Supply, is intended for use in electron stimulated desorption studies, secondary electron emission coefficient measurement studies, surface physics 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 1 eV to 2000 eV, with a low range included for improved resolution at the lowest energies. By use of multi-staging and a computer-designed electron zoom lens, a constant beam current is maintained over a two- order-of-magnitude change in energy, with a spot size also roughly constant. The gun can deliver 1 μA into an approximately 1 mm spot, at a 2 cm working distance and 10 eV. The electron gun uses a unipotential refractory cathode to generate a beam of low energy spread.
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. With Faraday cup, maximum is 65oC unless removed.
