Glossary
Ultra-high vacuum noble gas purification. Purification system

CODAP calculation rule

Code providing design, calculation, construction and inspection rules for pressure vessels. CODAP stands for Code de Construction des Appareils à Pression non soumis à la flamme.

R_x-y

Resolution required to separate two neighboring X and Y elements by mass spectrometry.

uma

Unit of atomic mass. This is an experimentally obtained value that does not belong to the International System (SI). It is equivalent to ≈ 1.6605 × 10^–27 kg, or 1/12 of the mass of an atom of ¹²C.

Sensor accuracy (pressure gauge, analyzer)

A detector's ability to provide a measurement close to the true value, regardless of its fidelity.

Sensor reliability (pressure gauge, analyzer)

A detector's ability to give a reproducible measurement based on the same measured quantity.

Accuracy or precision