Author/Authors :
Perrone، نويسنده , , A. and Cultrera، نويسنده , , L. and Pereira، نويسنده , , A. and Rossi، نويسنده , , M. and Cialdi، نويسنده , , S. and Boscolo، نويسنده , , I. and Tazzioli، نويسنده , , F. and Vicario، نويسنده , , C. and Gatti، نويسنده , , G.، نويسنده ,
Abstract :
Mg films deposited by pulsed laser ablation on a Cu substrate were tested as photocathodes in a DC diode. They showed features of robustness and a quantum efficiency of 3 × 10 - 4 at low accelerating field when illuminated by 266 nm light at normal incidence. A graphite protective layer of about 20 nm thickness deposited by laser ablation just after the Mg deposition made the cathode stable and of easy handling. The cathodes could stay for several weeks in air before being inserted in the test chamber. The preparation procedure and the tests are presented.
