Photocathode operation of a thermionic RF gun
Author
Summary, in English
The thermionic RF gun using a BaO cathode at the MAX-lab linac injector has been successfully commissioned for additional operation as a photocathode gun. By retaining the BaO cathode, lowering the temperature below thermal emission and illuminating it with a UV (263 nm) 9 ps laser pulse a reduced emittance and enhanced emission control has been achieved. Measurements show a normalised emittance of 5.5 mm mrad at 200 pC charge and a maximum quantum efficiency of 1.1×10-4. The gun is now routinely switched between storage ring injections in thermionic mode and providing a beam for the MAX-lab test FEL in photocathode mode.
Department/s
Publishing year
2009
Language
English
Pages
291-295
Publication/Series
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volume
606
Issue
3
Document type
Journal article
Publisher
Elsevier
Topic
- Accelerator Physics and Instrumentation
Status
Published
ISBN/ISSN/Other
- ISSN: 0167-5087