Abstract The reduction of the total secondary electron emission during electron-matter interactions is required to improve the maximum power limit of the vacuum RF equipments prone to multipactor discharge. In this work, a chemical deposition technique was developed to create the appropriate micron or submicron surface roughness to significantly improve the typical characteristics of the flat silver coatings used for high-power microwave devices for space applications. Rough silver coated RF filters with a high surface aspect ratio, >3, was achieved. It is found that the secondary electron emission yield (SEY) remains lower than 1 throughout the primary electron energy range and therefore multipactor electron avalanche is avoided. The influence of aging on the multipactor discharge is also drastically reduced in rough silver coatings. An experimental linear correlation was found between the multipactor power level and the minimum interaction energy for which the number of incident and emitted electrons is equal.

中文翻译：

---

微结构表面电子轰击下的低二次电子发射产率，寻找多重效应抑制

摘要 需要降低电子-物质相互作用过程中的总二次电子发射，以提高易发生多方放电的真空射频设备的最大功率限制。在这项工作中，开发了一种化学沉积技术来产生适当的微米或亚微米表面粗糙度，以显着改善用于空间应用的高功率微波设备的平坦银涂层的典型特性。实现了具有高表面纵横比 > 3 的粗糙镀银射频滤波器。发现二次电子发射产额 (SEY) 在整个一次电子能量范围内保持低于 1，因此避免了多粒子电子雪崩。在粗糙的银涂层中，老化对多路放电的影响也大大降低。