Low energy electron gun - UHV surface science

Low Energy Electron Source

Electron gun and power supply

The ELS 100 is a low energy electron source designed primarily for Electron Loss Spectroscopy (ELS)

Features of the ELS100 low energy electron source

Great specifications at an attractive price.
5 - 100 eV energy range.
Low energy spread 0.25 volts
~1.0mm spot size.
Lab6 filament
Front panel setting for beam energy, filament current, Wehnelt(grid), anode, focus and beam deflection
Sample current monitor from 1 nA to 1 uA with adjustable sample bias from 0 -to+15V
Deflectors for sample alignment
External Kinetic energy ramp by computer control.

Mechanical details
The source is mounted on a 70mm OD copper gasket flange. The OD of the gun is 33.5 mm and the length is 130.5 mm. The source is mounted to the flange with pillars to suit the insertion length required for your chamber.

Electronics
The controller supplies filament current and controls the beam energy, extraction optics and beam steering electrodes. There is also a sample current monitor to measure in the range 1 nA to 1uA with adjustable bias ( 0 - 15V ). The beam energy can be programmed externally with a 0-10V signal.(from a DAC for example.)

Topac Inc 231 CJC Highway, Cohasset MA 02025 USA
Tel: 781 740 8778 Fax: 781 740 8779 e-mail: sales@topac.com