This contribution describes the latest milestones of a multiyear program to build and operate
a compact-300 kV dc high voltage photogun with inverted insulator geometry and alkali …

Two K 2 CsSb photocathodes were manufactured at Brookhaven National Lab and
delivered to Jefferson Lab within a compact vacuum apparatus at pressure∼ 10-11 Torr …

A high-voltage dc photocathode electron gun was successfully conditioned up to a voltage
of 550 kV and a long-time holding test for 8 h was demonstrated at an acceleration voltage …

The design and fabrication of electrodes for direct current (dc) high voltage photoemission
electron guns can significantly influence their performance, most notably in terms of …

A new high voltage photoemission gun has been constructed at Cornell University which
features a segmented insulator and a movable anode, allowing the cathode-anode gap to …

Jefferson Lab is constructing a 350 kV direct current high voltage photoemission gun
employing a compact inverted-geometry insulator. This photogun will produce polarized …

Energy recovery linacs (ERLs), which can generate an electron beam having a high
average current and a small-emittance with the complete manipulation of electron beams in …

Large quantities of gas are desorbed from the anode electrode during initial high-voltage
conditioning of broad-area electrodes in a vacuum, equivalent to many monolayers and …

The use of high voltage (HV) electrodes in vacuum is commonplace in physics laboratories.
In such systems, it has long been known that electron emission from an HV cathode can …

GaAs-based photocathodes are the only viable source capable of providing spin-polarized
electrons for accelerator applications. This type of photocathode requires a thin surface …