Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2005-09-27
2005-09-27
Lee, John R. (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S292000, C250S281000, C250S282000
Reexamination Certificate
active
06949737
ABSTRACT:
The invention relates to a device for collecting ions, in particular in an isotope mass spectrometer. At least one secondary electron multiplier (SEM) is provided, this being constructed in the manner of a card, namely box-like and with a thickness which is low in comparison with its length and width. The SEM is held in a frame. In addition, a flat flexible printed circuit board with a plurality of parallel conductors is connected to the SEM. The flexible printed circuit board permits the positioning of the SEM in order to match the ion paths to be sampled.
REFERENCES:
patent: 4987335 (1991-01-01), Yamamoto et al.
patent: 5689152 (1997-11-01), Boutot et al.
patent: 6091068 (2000-07-01), Parfitt et al.
patent: 6180942 (2001-01-01), Tracy et al.
patent: 0278034 (1988-05-01), None
patent: 0932184 (1999-07-01), None
Schwieters Johannes
Seedorf Ronald
Dorsey & Whitney LLP
Hashmi Zia R.
Lee John R.
Thermo Electron (Bremen) GmbH
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