par Ustarroz Troyano, Jon ;Caro, I;Corengia, P;Garmendia, I;Marcos, J;Ahedo, E;Gonzalez del Amo, J
Référence 30th International Electric Propulsion Conference(Firenze, Italy), 30th International Electric Propulsion Conference
Publication Publié, 2007-09-17
Publication dans des actes
Résumé : Specific laboratory testing equipment, which allows studying the Sputtering behavior of Electric Propulsion materials, has been designed. The versatility of the equipment allows studying the Sputtering behavior dependence with the ion energy, the angle of incidence and the temperature. To that end, a methodology consisting in measuring the eroded volume has been proposed, leading to a complete procedure of Sputtering Yield characterization. Preliminary tests with Argon and Xenon on Copper have been carried out at 5000 eV leading to validate the procedure as results fit with available experimental data. Moreover, a method to establish the current density distribution, as the reflex of erosion produced at normal incidence, has been developed. Finally, Xenon to Borosil (BN-SiO2) trials have been completed, validating the procedure for insulating ceramic materials, which are used in accelerating channels. Dependence with the angle at 5000 eV has been studied; trials at lower energies (1000 and 500 eV) have been accomplished; and tests at high temperature have been successfully attempted. Results fit with the expectations.