Radiant energy – Ionic separation or analysis – With sample supply means
Reexamination Certificate
2005-11-29
2005-11-29
Wells, Nikita (Department: 2881)
Radiant energy
Ionic separation or analysis
With sample supply means
C250S42300F, C073S024020, C356S051000, C356S437000
Reexamination Certificate
active
06969849
ABSTRACT:
A particle mass spectrometer includes a supersonic flow expansion nozzle, and a source of a gas having particles entrained therein. The source is in gas-flow communication with an inlet of the expansion nozzle. The particle mass spectrometer further includes a vacuum chamber in gas-flow communication with an outlet of the expansion nozzle, wherein the vacuum chamber has a sufficient vacuum that a gas flow through the expansion nozzle is supersonic, and a microphone having an active element and an output signal responsive to a movement of the active element. The active element is disposed within the vacuum chamber and is positioned so that particles that flow from the outlet of the expansion nozzle impact upon the active element. The output signal of the active element of the microphone is a measure of the masses of the entrained particles.
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Leonard Jon N.
Small James G.
Alkov Leonard A.
Finn Thomas J.
Hashmi Zia R.
Raytheon Company
Vick Karl A.
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