Electron emission characterization of Mg photocathode grown by pulsed laser deposition within an S-band rf gun

• Main Authors: L. Cultrera, G. Gatti, P. Miglietta, F. Tazzioli, A. Perrone, J. T. Moody, P. Musumeci
• Format: Article
• Language: English
• Published: American Physical Society 2009-04-01
• Series: Physical Review Special Topics. Accelerators and Beams
• Online Access: http://doi.org/10.1103/PhysRevSTAB.12.043502

Pulsed laser deposition (PLD) has been proposed several years ago as a suitable technique to deposit a pure Mg film over a radio frequency (rf) gun Cu backflange in order to obtain a high efficiency photocathode surface for the generation of high brightness electron beams. In this paper we report preliminary experimental results on the emission properties of a PLD grown Mg film within the high electric field gradients of a rf gun showing the effects of the rf conditioning process on the cathode surface. Even though a laser cleaning process should be performed on the sample surface in order to remove contaminated layers, the results presented here are very promising for the realization of a final Mg-based photocathode.