Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum

Smith, Richard D; Shaffer, Scott A

Title: Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum

Abstract

A method and apparatus for focusing dispersed charged particles. More specifically, a series of elements within a region maintained at a pressure between 10.sup.-1 millibar and 1 bar, each having successively larger apertures forming an ion funnel, wherein RF voltages are applied to the elements so that the RF voltage on any element has phase, amplitude and frequency necessary to define a confinement zone for charged particles of appropriate charge and mass in the interior of the ion funnel, wherein the confinement zone has an acceptance region and an emmitance region and where the acceptance region area is larger than the emmitance region area.

Inventors:

Smith, Richard D ^[1]; Shaffer, Scott A ^[2]

Richland, WA
Seattle, WA

Issue Date:: 2000-01-01

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

OSTI Identifier:: 873179

Patent Number(s):: 6107628

Assignee:: Battelle Memorial Institute (Richland, WA)

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J49/066 - {Ion funnels}

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DOE Contract Number:: AC06-76RL01830

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; apparatus; directing; charged; particles; generated; near; atmospheric; pressures; region; vacuum; focusing; dispersed; specifically; series; elements; maintained; pressure; 10; -1; millibar; bar; successively; larger; apertures; forming; funnel; rf; voltages; applied; voltage; element; phase; amplitude; frequency; define; confinement; zone; appropriate; charge; mass; interior; acceptance; emmitance; charged particles; charged particle; atmospheric pressure; particles generated; rf voltage; near atmospheric; atmospheric pressures; /250/

Citation Formats


                    Smith, Richard D, and Shaffer, Scott A. Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum.  United States: N. p., 2000. 
        Web.

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                    Smith, Richard D, & Shaffer, Scott A. Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum.  United States.

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                    Smith, Richard D, and Shaffer, Scott A. Sat .  
        "Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum".  United States.  https://www.osti.gov/servlets/purl/873179.

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@article{osti_873179,

  title        = {Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum},

  author       = {Smith, Richard D and Shaffer, Scott A},

  abstractNote = {A method and apparatus for focusing dispersed charged particles. More specifically, a series of elements within a region maintained at a pressure between 10.sup.-1 millibar and 1 bar, each having successively larger apertures forming an ion funnel, wherein RF voltages are applied to the elements so that the RF voltage on any element has phase, amplitude and frequency necessary to define a confinement zone for charged particles of appropriate charge and mass in the interior of the ion funnel, wherein the confinement zone has an acceptance region and an emmitance region and where the acceptance region area is larger than the emmitance region area.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2000},

  month        = {1}

}

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Works referenced in this record:

Collisional focusing effects in radio frequency quadrupoles
journal, May 1992

Douglas, D. J.; French, J. B.
Journal of the American Society for Mass Spectrometry, Vol. 3, Issue 4, p. 398-408
https://doi.org/10.1016/1044-0305(92)87067-9

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Title: Method and apparatus for directing ions and other charged particles generated at near atmospheric pressures into a region under vacuum

Abstract

Citation Formats

Collisional focusing effects in radio frequency quadrupoles journal, May 1992

Collisional focusing effects in radio frequency quadrupoles
journal, May 1992