Title :
Voltage Breakdown in RF Cavities, DC Vacuum Gaps, and Computer Simulations
Author_Institution :
Colorado Univ., Boulder, CO
Abstract :
Summary form only given. Results from DC breakdown experiments designed to imitate (to some extent) breakdown in microwave resonators will be presented. "Before" and "after" pictures demonstrate the dangers of contaminant particles, and post-breakdown surface analyses show the damage caused by the arc around the field emitter, including the extent of ion bombardment. A simple model can explain the initiation of breakdown at a field emitter around which a monolayer of neutral atoms suddenly desorbs. Computer simulations using OOPIC show in more detail how breakdown might be thus triggered, and confirm the model\´s predictions of a critical current and gas density necessary for breakdown
Keywords :
arcs (electric); cavity resonators; current density; digital simulation; microwave devices; vacuum breakdown; DC vacuum gaps; OOPIC computer simulations; RF cavities; arc; contaminant particles; critical current density; field emitter; gas density; ion bombardment; microwave resonators; neutral atoms; post-breakdown surface analyses; voltage breakdown; Atomic layer deposition; Breakdown voltage; Computer simulation; Critical current; Dielectric breakdown; Electric breakdown; Predictive models; Radio frequency; Surface contamination; Vacuum breakdown;
Conference_Titel :
Power Modulator Symposium, 2006. Conference Record of the 2006 Twenty-Seventh International
Conference_Location :
Arlington, VA
Print_ISBN :
1-4244-0018-X
Electronic_ISBN :
1-4244-0019-8
DOI :
10.1109/MODSYM.2006.365177
