Abstract

In this work we studied an electron beam source using an KrCl excimer laser and three Cu cathodes having three different roughness values: 0, 3.5 and 9 µm. The experimental apparatus is shown in Fig.1. The laser beam illuminated the cathodes by a convergent lens accelerating the electrons generated from cathode. The electron beam total current was monitored by a fast Rogowski coil while the beam quality was estimed determining the beam emittance. For this last measurements a slit-slit method was used¹. Namely, the electron beam was selected in small beamlets by the first slit array and the beamlet direction spread was monitored moving the second slit arrays and measuring the current by the small Faraday cups, see Fig. 1.

© 1998 IEEE