High voltage dc gun for high intensity polarized electron source

The high intensity polarized electron source is a critical component for future nuclear physics facilities. electron-ion collider requires gun with higher voltage and bunch charge compared to any existing source. At Brookhaven National Laboratory, we have built an inverted direct current (HVDC) photoemission large cathode size. We report on the performance of GaAs photocathodes in gradient up 16 nC charge. measurements were performed at stable operating gap 300 kV—demonstrating outstanding lifetime robustness. observed obvious enhancement by biasing anode. also integrated cooling system potential application sources. various novel features implemented demonstrated this HVDC will open door toward intensity-high average accelerator facilities.6 MoreReceived 12 December 2021Accepted 7 March 2022DOI:https://doi.org/10.1103/PhysRevAccelBeams.25.033401Published American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution work must maintain attribution author(s) published article’s title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasVacuum technologyPhysical SystemsElectron sourcesTechniquesParticle sources & targetsAccelerators Beams