This consisted of radio-frequency source fed through a coil spread along the vacuum chamber. Lawrence's hunch about the effect of the air molecules in the vacuum chamber was confirmed. This was tested on Earth with lunar simulant in a vacuum chamber. This device typically consists of two wire cages inside a vacuum chamber. The deposition is performed inside a vacuum chamber. Tests were done on a full-size test article in vacuum chamber. Metals are arguably the most prevalent vacuum chamber materials. Gaseous rubidium atoms were pumped into a vacuum chamber. The process can be expensive because it must be performed inside a vacuum chamber vessel. A jet of steam entrains the vapour that must be removed from the vacuum chamber. A vacuum fryer is a deep-frying device housed inside a vacuum chamber. The receiver may be enclosed in a glass vacuum chamber. His design included ion beams to shoot ions into the vacuum chamber. VIM involves placing a core-less induction furnace into a vacuum chamber. Electron beam freeform fabrication uses an electron beam heat source inside a vacuum chamber.