High Quality Content by WIKIPEDIA articles! A vacuum chamber is a rigid enclosure from which air and other gases are removed by a vacuum pump. The resulting low pressure, commonly referred to as a vacuum, allows researchers to conduct physical experiments or to test mechanical devices which must operate in outer space (for example). Chambers made of aluminum allow one to control the magnetic field inside from outside the vacuum. At the opposite chambers made of mu-metal prevent external fields from entering the vacuum.

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