Patent · US Expired

Ionization vacuum gauge using a cold micropoint cathode

US5278510A · kind A · utility

20Cited by

3References

8Claims

0Family size

Assignee

COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

Robert Baptist · Échirolles, FR
Christophe Py · Ottawa, CA

Key dates

Filing date	Jul 20, 1992
Grant date	Jan 11, 1994
Priority date	—
Expiry date	Jul 20, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2201/30403
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Ionization vacuum gauge comprising, like Bayard Alpert gauges, in a chamber (1) containing an extremely low pressure atmosphere, whose ultra-vacuum degree it is desired to be measured, an electron source cathode (2), a grid (3) for collecting these electrons and surrounding a collector (4) of ions resulting from the impact of the electrons on the gas molecules of the extremely low pressure atmosphere, wherein the electron source is a cold micropoint cathode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.