Electron Beam Gun
Measures electric fields, heavy particle velocities and electron collision cross-sections.
Figure 1. Upper: An electron colliding with an ion. Lower: An electron deflected by an electric field.
The electron beam gun accelerates electrons to energies adjustable between 600 and 30,000 V.
By shooting the beam through a gas or plasma plume, heavy particle velocities and electron collision cross-sections can be inferred.
The gun can also be used to measure electric fields in a discharge by observing the deflection of the electron beam of known energy.
Selected Relevant Publications
Wetzel, R. C., et al., "Absolute Cross Sections for Electron-Impact Ionization of the Rare-Gas Atoms by the Fast-Neutral-Beam Method," Physical Review A, Vol. 35, No. 2, Jan. 15, 1987, pp. 559-577.