rarefier

A rarefier is a device or process used to reduce the density of a substance, typically a gas, in a confined space. This is achieved by removing a portion of the molecules from that space. Rarefiers are often employed in scientific and industrial applications where low-pressure environments are required. For instance, vacuum pumps are a common type of rarefier, used to create vacuums in chambers for experiments, manufacturing processes like semiconductor fabrication, or even in medical equipment such as vacuum-assisted wound drainage systems. The degree of rarefaction achieved by a rarefier can vary significantly, ranging from partial vacuums to ultra-high vacuums, depending on the specific design and application. The principle behind most rarefiers involves physically expelling gas molecules from the system or trapping them in a way that reduces their overall concentration. This can be accomplished through mechanical means, such as pistons or rotors, or through physical phenomena like condensation or adsorption. The effectiveness of a rarefier is typically measured by the pressure it can achieve or the rate at which it can remove gas from a given volume.