Patent · US Expired

Process for determining mass spectrum by time of flight and spectrometer carrying out this process

US4677295A · kind A · utility

6Cited by

1References

6Claims

0Family size

Assignee

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR

Inventors

Serge D. Negra · Chilly-Mazarin, FR
Yvon Le Beyec · Les Ulis, FR

Key dates

Filing date	Jul 30, 1985
Grant date	Jun 30, 1987
Priority date	—
Expiry date	Jul 30, 2005

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A process for determining mass spectrum by time of flight, wherein a source comprising a solid surface is subjected to the action of an electric field between this surface and an electrode, this provoking the simultaneous emission of electrons and of negative ions released by spontaneous desorption; the electrons and negative ions are received successively by a detector to determine the mass spectrum as a function of the differences between the instants of reception of the electrons and the negative ions.

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