Radiant energy – Ionic separation or analysis – Methods
Patent
1987-02-13
1989-12-26
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
Methods
250287, 250288, 250423P, H01J 4940
Patent
active
048899879
ABSTRACT:
A charged particle spectrometer for performing ultrasensitive quantitative analysis of selected atomic components removed from a sample. Significant improvements in performing energy and angular refocusing spectroscopy are accomplished by means of a two dimensional structure for generating predetermined electromagnetic field boundary conditions. Both resonance and non-resonance ionization of selected neutral atomic components allow accumulation of increased chemical information. A multiplexed operation between a SIMS mode and a neutral atomic component ionization mode with EARTOF analysis enables comparison of chemical information from secondary ions and neutral atomic components removed from the sample. An electronic system is described for switching high level signals, such as SIMS signals, directly to a transient recorder and through a charge amplifier to the transient recorder for a low level signal pulse counting mode, such as for a neutral atomic component ionization mode.
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patent: 4442354 (1984-04-01), Hurst et al.
patent: 4633084 (1986-12-01), Gruen et al.
patent: 4733073 (1988-03-01), Becker
Gruen Dieter M.
Pellin Michael J.
Young Charles E.
Anderson Bruce C.
ARCH Development Corporation
Mann Philip P.
Rechtin Michael D.
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