Desorbing Water in Vacuum Systems: Bakeout or UV?

摘要

Shorter pumpdown times or lower pressures can be achieved by using either bakeout or UV energy to desorb water vapor. Here's how to decide which method is right for you. Water vapor, desorbing from the internal surfaces of vacuum systems, is a problem that's common to vacuum technology as a whole. Every time a vacuum system is opened to ambient air with its attendant humidity, the internal surfaces become covered with layers upon layers of water molecules. Every item placed within a vacuum system is likewise covered with water molecules.