high vacuum
Noun
Meaning
high vacuum (plural high vacuums)
(physics) A vacuum having a pressure less than about a hundred millipascals
Alternative names
high-vacuum
Examples
Implosion High vacuum inside glass-walled cathode ray tubes permits electron beams to fly freely without colliding into molecules of air or other gas.
High vacuum systems generally require metal chambers with metal gasket seals such as Klein flanges or ISO flanges, rather than the rubber gaskets more common in low vacuum chamber seals.
High vacuum systems must be clean and free of organic matter to minimize outgassing.
High vacuum usually requires multi-stage pumping and ion gauge measurement.