×

Programmed electron flux

  • US 6,255,648 B1
  • Filed: 10/16/1998
  • Issued: 07/03/2001
  • Est. Priority Date: 10/16/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A mass spectrometer comprising:

  • (a). a FTICR mass spectrometer with an ionization region;

    (b). an electron source;

    (c). an electron collector opposite said electron source;

    (d). a power source having an output signal with an amplitude representative of the predetermined total number of electrons to be produced by said electron source during an ionization event in said mass spectrometer; and

    (e). a circuit connected to said electron collector for determining when said electron source has produced said predetermined total number of electrons and generating a signal representative thereof for ensuring that a same number of electrons are used in each measurement of said mass spectrometer.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×