Speaker
Victoria Madeleine Bjelland
Description
Two chamfered electrodes were tested in the Large Electrode System (LES) at CERN. Having a flat-shaped cathode and a frustum shaped anode gives a higher electric field in the centre of the electrodes, while it linearly decays towards the edge.
Normal breakdown rates are observed in the centre of the electrodes. However, lower breakdown rates with regards to the electric field was found for the rest of the surface. A higher density of breakdowns occurred in the cerntral, high field region. This area effectively controlled the conditioning algorithm, leading to a lower density of breakdowns for equivalent fields.This corresponds well with Monte Carlo simulations.
