high vacuum

Meaning

A state of extremely low gas pressure, typically ranging from 10⁻⁴ to 10⁻⁷ Pascals, where the mean free path of gas molecules is significantly larger than the dimensions of the container.

Examples

• The laboratory setup requires a high vacuum to prevent the electron beam from scattering off air molecules.
• Engineers monitored the pressure gauges to ensure the chamber reached a high vacuum before starting the deposition process.