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:
-
- Richland, WA
- Seattle, WA
- Issue Date:
- Research Org.:
- Pacific Northwest National Laboratory (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
- 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.
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.
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.
@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