Non-destructive beam characterization at an electron source exit

The method, experimental set-up, and experimental results, referring to the non-destructive beam emittance at an electron source exit, as well as to t he beam envelope determination, are presented. The method consists in an in teractive use of both the beam cross-section measurements, realized in the three-gradient arrangement, and the K-V equation. The important parts of th e experimental set-up are: the electron source (a Pierce convergent diode, working in a pulse mode), an axially symmetric magnetic lens, and two beam profile monitors (wire scanners). The electron source is of the type freque ntly used in linear accelerators, particularly in our accelerators ALIN-10 and ALID-7 at NILPRP, and works in the energy range of 20-70 keV, with 4 mu s pulse duration and 0.1-1 A pulse intensity. (C) 2000 Published by Elsevi er Science B.V. All rights reserved.