Back to results
US 6,683,301 B2Granted
Charged particle trapping in near-surface potential wells
AssigneeAnalytica of Branford, Inc.
InventorsCraig Whitehouse, David G. Welkie
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAnalytica of Branford, Inc.
InventorsCraig Whitehouse, David G. Welkie
Estimating the term…
A Time-Of-Flight mass spectrometer is configured with a pulsing region and electronic controls that generate a potential well for ions in the pulsing region, due to the repelling effect of a high-frequency electric field that is created in the space immediately proximate to a surface, and an additional static electric field that accelerates ions toward the surface. Ions can be constrained and accumulated over time in the potential well prior to acceleration into the Time-Of-Flight tube for mass analysis. Ions can also be directed to collide with the surface with high energy to cause Surface Induced Dissociation (SID) fragmentation, or with low energy to effect collisional cooling, hence, better spatial focusing, prior to mass analysis. The apparatus and methods described in the invention result in refined control of ion fragmentation energy and improved Time-Of-Flight mass analysis performance.
An apparatus for trapping ions, comprising:
An apparatus for analyzing chemical species, comprising:
An apparatus for analyzing chemical species comprising a Time-of-Flight mass analyzer comprising a pulsing region and a detector, said pulsing region comprising:
An apparatus for analyzing chemical species comprising a Time-of-Flight mass analyzer comprising an ion reflector, said ion reflector comprising:
A method for trapping ions using an array of electrodes to which AC and DC voltages are applied, and a counter electrode to which DC voltages are applied, said method comprising:
A method for trapping ions using an array of electrodes to which AC and DC voltages are applied, and a counter electrode to which DC voltages are applied, said method comprising:
A method for analyzing chemical species using an array of electrodes to which AC and DC voltages are applied, a counter electrode to which DC voltages are applied, and a mass spectrometer, said method comprising:
A method for analyzing chemical species using an array of electrodes to which AC and DC voltages are applied, a counter electrode to which DC voltages are applied, and a mass spectrometer, said method comprising:
A method for analyzing chemical species using an array of electrodes to which AC and DC voltages are applied, a counter electrode to which DC voltages are applied, and a mass spectrometer, said method comprising:
A method for analyzing chemical species using an array of electrodes to which AC and DC voltages are applied, a counter electrode to which DC voltages are applied, and a mass spectrometer, said method comprising:
A method for analyzing chemical species using a Time-of-Flight mass analyzer with an ion reflector comprising an array of electrodes to which AC and DC voltages are applied and a counter electrode to which DC voltages are applied, said method comprising:
A method for analyzing chemical species using a Time-of-Flight mass analyzer with an ion reflector comprising an array of electrodes to which AC and DC voltages are applied and a counter electrode to which DC voltages are applied, said method comprising:
A method for analyzing chemical species using a Time-of-Flight mass spectrometer comprising a pulsing region and a detector, said pulsing region comprising an array of electrodes to which AC and DC voltages are applied and a counter electrode to which DC voltages are applied, said method comprising:
A method for analyzing chemical species using a Time-of-Flight mass spectrometer comprising a pulsing region and a detector, said pulsing region comprising an array of electrodes to which AC and DC voltages are applied and a counter electrode to which DC voltages are applied, said method comprising:
Dependencies are inferred from the claim text.