Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Reexamination Certificate
2006-02-14
2006-02-14
Lee, John R. (Department: 2881)
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
C250S291000, C250S292000, C250S294000
Reexamination Certificate
active
06998610
ABSTRACT:
An ion trap comprises a three-dimensional rotationally symmetric ring electrode and two cap electrodes, the ring electrode is divided, in parallel to its central axis, into a plurality of even number, equal or larger than four, of component electrodes. The component electrodes are electrically isolated from each other, the surfaces of the two cap electrodes face toward the inside of the ion trap. A mechanism is constructed and arranged for switching the ion trap to operate between a three-dimensional quadrupole ion trap mode and a two-dimensional linear ion trap mode.
REFERENCES:
patent: 2939952 (1960-06-01), Paul et al.
patent: 3065640 (1962-11-01), Langmuir et al.
patent: 3527939 (1970-09-01), Dawson et al.
patent: 4540884 (1985-09-01), Stafford et al.
patent: 5028777 (1991-07-01), Franzen et al.
patent: RE34000 (1992-07-01), Syka et al.
patent: 5420425 (1995-05-01), Bier et al.
patent: 5468958 (1995-11-01), Franzen et al.
patent: 5783824 (1998-07-01), Baba et al.
patent: 6075244 (2000-06-01), Baba et al.
patent: 6403955 (2002-06-01), Senko
patent: 6727495 (2004-04-01), Li
patent: 6844547 (2005-01-01), Syka
Quadrupole Mass Spectrometry and its Applications, Edited by P.H. Dawson, Published by Elsevier, 1976.
R. E. March and R.J. Hughes, “Quadrupole Storage Mass Spectrometry”, John Wiley & Sons, New York, 1984.
Practical Aspects of Ion Trap Mass Spectrometry, vol. I, II, III, Edited by R. E. March, John F. J. Todd, CRC Press, Boca Raton, New York, London, Tokyo, 1995.
E. C. Beaty, “Simple Electrodes for Quadrupole Ion Trap”, Journal of Applied Physics, 61, (1987) 2118-2122.
Y. Wang, et al, “The Non-Linear Resonance Ion Trap, Part 2 : A General Theoretical Analysis”, International Journal of Mass Spectrometry and Ion Processes, 124, (1993) 125-144.
R. Alheit, et al, “High Order Non-Linear Resonances in a Paul Trap”, International Journal of Mass Spectrometry and Ion Processes, 154, (1996) 155-169.
Lee John R.
Vanore David A.
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