Progress in a photocathode DC gun at the compact ERL

N. Nishimori, R. Nagai, S. Matsuba, R. Hajima, M. Yamamoto, Y. Honda, T. Miyajima, H. Iijima, M. Kuriki, M. Kuwahara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The next generation light sources such as energy recovery linac (ERL) light sources and X-ray FEL oscillator require high brightness electron gun with megahertz repetition rate. We have developed a DC photoemission gun at JAEA and demonstrated generation of a 500-keV electron beam from the gun. This demonstration was achieved by addressing a discharge problem that leads to vacuum breakdown of the DC gun. The problem is microdischarge at an anode electrode or a vacuum chamber, which is triggered by microparticle transfer or field emission from a cathode electrode. An experimental investigation has revealed that larger acceleration gap optimized to mainly reduce surface electric field of anode electrode results in suppression of the microdischarge events. The gun was transported to the compact ERL (cERL) at KEK. The commissioning of the injector system of the cERL is under way.

Original languageEnglish
Title of host publicationFEL 2013
Subtitle of host publicationProceedings of the 35th International Free-Electron Laser Conference
Pages184-188
Number of pages5
Publication statusPublished - 2013
Event35th International Free-Electron Laser Conference, FEL 2013 - New York, NY, United States
Duration: 2013 Aug 262013 Aug 30

Publication series

NameFEL 2013: Proceedings of the 35th International Free-Electron Laser Conference

Other

Other35th International Free-Electron Laser Conference, FEL 2013
CountryUnited States
CityNew York, NY
Period13/8/2613/8/30

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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