Low-voltage, high-current electron gun

Abstract

A simple, high-performance, electrostatically focused electron gun, which is useful over an energy range extending from a few electron volts to at least 500 eV, is described. The current is delivered in a beam ∼1 mm in diameter, with <50 mrad angular divergence and typically has a current over 1 mA at 100 eV. The design is small, compact, and rugged. This electron gun has been used successfully in both laboratory and sounding rocket experiments.

The electronic structure of 1,2-PCB10H11 molecular films: a precursor to a novel semiconductor

“…Film growth and substrate preparation has been described in detail elsewhere [22]. For the inverse photoemission studies, a Geiger-Müller detector fi tted with a SrF 2 window of 9.5 eV pass energy was used in conjunction with an Erdman-Zipf electron gun [23]. The overall energy resolution was ~ 0.40 eV.…”

The interplay between the surface band structure and possible surface reconstructions of Mo(112)

“…The IPES system, with a resolution of 420 meV, incorporates an Erdman-Zipf electron gun [23] along with a Geiger-Müller detector with a SrF 2 window in an apparatus previously described elsewhere [24]. The electron energy was swept from 5.5 to 12.5 eV, at incident angles between normal and 60 degrees, or from zone center (Γ ) out to the Brillouin zone edge (Χ ).…”

Evidence of dynamic Jahn-Teller distortions in two-dimensional crystalline molecular films

“…For the IPES studies, a Geiger-Müller detector with a CaF 2 window was used in conjunction with an Erdman-Zipf electron gun. 15 The overall energy resolution was ϳ400 meV. All IPES spectra were collected with the electrons incident normal to the surface.…”