Ultra high vacuum test setup for electron gun

Rolling Contact Fatigue in Ultra High Vacuum

A High Current, High Gradient, Laser Excited, Pulsed Electron Gun

This paper describes a pulsed electron gun that can be used as an FEL, as an injector for electron linear accelerators or for rf power generation. It comprises a 1 to 5 MeV, 1 to 2 ns pulsed power supply feeding a single diode, photoexcited acceleration gap. Beam quality of a ~ 1nC charge in ~ 1 GV/m field was studied. Computations of the beam parameters as a function of electrode configuration...

High current table-top setup for femtosecond gas electron diffraction

We have constructed an experimental setup for gas phase electron diffraction with femtosecond resolution and a high average beam current. While gas electron diffraction has been successful at determining molecular structures, it has been a challenge to reach femtosecond resolution while maintaining sufficient beam current to retrieve structures with high spatial resolution. The main challenges ...

High-vacuum versus ‘‘environmental’’ electron beam deposition

Electron beam deposition ~EBD! provides an inexpensive way to fabricate nanostructures of various materials in a scanning electron microscope ~SEM!. However, the purity of metals deposited from an organometallic precursor gas is impaired by simultaneously deposited carbon coming both from the organometallic molecule and the residual contamination gas in the SEM chamber. We discuss carbon-contam...

Electron Gun Technology