Abstract

We review the current status of metallic photocathodes based on thin films prepared by pulsed laser deposition (PLD) and we explore ways to improve the performance of these devices. PLD seems to be a very efficient and suitable technique for producing adherent and uniform thin films. Time-resolved mass spectrometric investigations definitively suggest that the deposition of high-purity metallic thin films should be carried out in ultrahigh vacuum systems and after a deep and careful laser cleaning of the target surface. Moreover, the laser cleaning of the target surface is highly recommended not only to remove the first contaminated layers but also to improve the quality of the vacuum by reducing the partial pressure of reactive chemical species as H2O, H2, and O2 molecules. The challenge to realize high-purity Mg and Y thin films is very interesting for the photocathode R&D due to the good photoemission properties of these metals.

Autore Pugliese

• Lorusso Antonella , Perrone Alessio

Tutti gli autori

• A. Lorusso , F. Gontad , A. Perrone , N. Stankova

Titolo volume/Rivista

PHYSICAL REVIEW SPECIAL TOPICS. ACCELERATORS AND BEAMS

Anno di pubblicazione

2011

ISSN

1098-4402

ISBN

Non Disponibile

Numero di citazioni Wos

17

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

19

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile