A Three-Dimensional Quadrupolar Mass Analyzer. II. Operational Characteristics.
Technical rept. Jun 69-Dec 70,
EDGEWOOD ARSENAL MD
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The properties of a 3DQ mass analyzer constructed are described. Ion-generation and withdrawal pulses are made coherent with the radio frequency rf driving voltage. This allows the rf phase dependence of these events to be measured in addition, lifetimes of stored ions can be conveniently measured. Representative results of lifetime studies on N2 at various background pressures and rf frequencies are given. The maximum intensity and the area of the N2 peak are observed as functions of the dc-to-rf voltage ratio, rf frequency, repetition rate of the ionization withdrawal sequence, background pressure, and storage time. Author
- Test Facilities, Equipment and Methods
- Atomic and Molecular Physics and Spectroscopy