We analyze the dependence of the Secondary Electron Emission yield on the beam incidence angle (θ) in the case of Faraday cups used for diagnosis of laser-plasma. We show that this dependence follows a sec α (θ) law, consequently θ≠ 0 situations (ie non-normal incidence) should be treated with care to avoid wrong measurements.
24 Apr 2014
Volume: 508 Issue: 1 Pages: 012021
Journal of Physics: Conference Series