Radiant energy – Ion generation – Electron bombardment type
Reexamination Certificate
2005-12-13
2005-12-13
Wells, Nikita (Department: 2881)
Radiant energy
Ion generation
Electron bombardment type
C250S288000, C250S292000
Reexamination Certificate
active
06974957
ABSTRACT:
The ionization device of the present invention is intended for use in conjunction with an aerosol TOF MS operating in a continuous mode and is capable of ionizing particulated substances in a wide range of particle masses. In the illustrated embodiment, the ionization unit consists of three coaxial cylindrical bodies having a three aligned longitudinal slits for directing electron beams from externally located electron gun onto the axially arranged flow of droplets. The cylindrical bodies are connected to voltage sources so that the external cylindrical body functions as an anode that extracts electrons from the current-heated filament. The central cylindrical body, in combination with the aforementioned anode, serves as an electron-energy control member for precisely controlling and selecting the energy of electrons that reach the flow of particles, while the inner cylindrical body functions as a decelerating member that can be used for adjusting energy of electrons which reached the flow of particles. The heated filament of each electron gun, which is used as a source of electrons, is inclined with respect to the aforementioned longitudinal axis whereby modulation applied to the elongated outer electrode of the electron gun provides different ionization conditions for specific particles of predetermined masses for analysis of which the aerosol TOF MS is tuned.
REFERENCES:
patent: 5382794 (1995-01-01), Downey et al.
patent: 5396065 (1995-03-01), Myerholtz et al.
patent: 5753909 (1998-05-01), Park et al.
patent: 5756996 (1998-05-01), Bier et al.
patent: 5825025 (1998-10-01), Kerly
patent: 5907154 (1999-05-01), Shimomura
patent: 6040574 (2000-03-01), Jayne et al.
patent: 6107625 (2000-08-01), Park
patent: 6198096 (2001-03-01), Cocq
patent: 6271527 (2001-08-01), Chutjian
patent: 6300626 (2001-10-01), Brock et al.
patent: 6410915 (2002-06-01), Bateman et al.
patent: 6524803 (2003-02-01), Overney et al.
patent: 6593570 (2003-07-01), Li et al.
patent: 6629508 (2003-10-01), Dykstra
patent: 6649907 (2003-11-01), Ebeling et al.
patent: 6809318 (2004-10-01), Krutchinsky et al.
U.S. Appl. No. 10/58,153, filed Jul. 2003, Glukhoy.
Reece Roth: vol. 1, Institute of Physics, Publishing, Bristol and Philadelphia, 1992, pp. 206-218.
G. Wilhelmi, et al., “Binary Sequences and Error Analysis for Pseudo-Statistical Neutron Modulators With Different Duty Cycles”, Nuclear Inst. and Methods, 81 (1970), pp. 36-44.
Nanomat, Inc.
Smith II Johnnie L
LandOfFree
Ionization device for aerosol mass spectrometer and method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ionization device for aerosol mass spectrometer and method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionization device for aerosol mass spectrometer and method... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470902