Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Patent
1980-11-26
1982-12-07
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
250423R, B01D 5944
Patent
active
043629369
ABSTRACT:
Apparatus for monitoring a plasma process in which a plasma is formed to occupy a specified region, which apparatus is composed of: a mass spectrometer system including a mass analyzer having an ion inlet and an ion outlet and an ion detector disposed in operative association with the ion outlet; an output device connected to the detector for providing an output signal representative of the mass spectrum of ions observed by the mass spectrometer system; and an ion-optical system having an inlet opening located in the vicinity of the specified region and disposed for extracting ions from the plasma and focussing the ions thus extracted onto the ion inlet of the analyzer, whereby the output signal produced by the output device is representative of the mass spectrum of ions in the plasma.
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Hofmann Dieter
Wechsung Reiner
Anderson Bruce C.
Leybold-Heraeus GmbH
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