Michael Allan Physics and Chemistry with Free Electrons

The Spectrometer with Electrostatic Analysers

Photo of the ELS.

Schematic Diagram (F - filament, Ch - channeltron, the analysers are differentially pumped)

The Manchester solenoid:

This instrument has been equipped with the "magnetic angle changer" (MAC), a device invented in the group of professor Frank Read at the University of Manchester. This device permits continuous coverage of scattering angles from 0° to 180°.

The Fribourg form of this device minimizes the perturbation of the gas flow in the collision region, that is, the solenoids are made as "optically transparent" as possible.

3D graphics of the MAC

Photo of the MAC, before coating with colloidal graphite..

• M. Allan, J. Phys. B 25 (1992) 1559.
• M. Allan, J. Phys. B 28 (1995) 5163.
• M. Allan, J. Phys. B 33 (2000) L215.