US3783279A - Hyperbolic field mass filter - Google Patents

Hyperbolic field mass filter Download PDF

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Publication number
US3783279A
US3783279A US00120482A US3783279DA US3783279A US 3783279 A US3783279 A US 3783279A US 00120482 A US00120482 A US 00120482A US 3783279D A US3783279D A US 3783279DA US 3783279 A US3783279 A US 3783279A
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Prior art keywords
electrodes
primary
entrance
auxiliary
ion
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Expired - Lifetime
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US00120482A
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English (en)
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W Brubaker
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/26—Mass spectrometers or separator tubes
    • H01J49/34—Dynamic spectrometers
    • H01J49/42—Stability-of-path spectrometers, e.g. monopole, quadrupole, multipole, farvitrons
    • H01J49/4205—Device types
    • H01J49/421—Mass filters, i.e. deviating unwanted ions without trapping
    • H01J49/4215—Quadrupole mass filters

Definitions

  • the delayed d.c.ramp is obtained by applying d.c. potentials only to the auxiliary electrode or electrodes. The polarities of these potentials are opposite that of the corresponding primary electrodes.
  • the field resulting from the'potentials applied to the auxiliary electrode cancels or neutralizes the dc. component of the field from the primary electrodes :in the vicinity of the entrance aperture.
  • the a.c. field fromthe primary electrodes is of essentially normal strength in the vicinity of the entrance aperture.
  • the normalized d.c. field is BRIEF DESCRIPTION'OF THE DRAWINGS
  • FIG. 1 is a stability diagram illustrating the operating characteristics of a quadrupole or monopolemass filter
  • d.c. bias sources is used for illustration only.
  • the d.c. potential would normally be obtained from the a.c. source 60 by rectification, and would be proportional to the a.c. potential.
  • Such means are described and illustrated in my US. Pat. No. 3,129,327.
  • the X electrodes (12 and 16) are provided with a positive d.c. potential and the Y electrodes (14 and 18) are provided with a negative d.c. potential.
  • a housing having an ion entrance plate at one end which defines an ion entrance aperture and an ion exit plate at the other end which defines an ion exit aperture
  • each of the auxiliary electrodes having a major portion thereof positioned between said plane defined by the ends of the primary electrodes and the ion source so that the a.c. field in the vicinity of the ion entrance aperture produced by the r.f. voltages on the primary electrodes is substantially unaffected by the presence of the auxiliary electrodes, and

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Tubes For Measurement (AREA)
  • Fuel Cell (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
US00120482A 1971-03-03 1971-03-03 Hyperbolic field mass filter Expired - Lifetime US3783279A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12048271A 1971-03-03 1971-03-03

Publications (1)

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US3783279A true US3783279A (en) 1974-01-01

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ID=22390583

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US00120482A Expired - Lifetime US3783279A (en) 1971-03-03 1971-03-03 Hyperbolic field mass filter

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US (1) US3783279A (de)
JP (1) JPS5517465B1 (de)
DE (1) DE2209951A1 (de)
FR (1) FR2128554B1 (de)
GB (1) GB1341357A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937954A (en) * 1973-03-30 1976-02-10 Extranuclear Laboratories, Inc. Methods and apparatus for spatial separation of AC and DC electric fields, with application to fringe fields in quadrupole mass filters
DE2716287A1 (de) * 1976-06-04 1977-12-08 Finnigan Corp Vielpol-massenfilter
EP0217644A2 (de) * 1985-10-01 1987-04-08 Finnigan Corporation Quadrupolmassenfilter
US4814613A (en) * 1987-03-06 1989-03-21 Extrel Corporation Collision cell for triple quadrupole tandem mass spectrometry
US6153880A (en) * 1999-09-30 2000-11-28 Agilent Technologies, Inc. Method and apparatus for performance improvement of mass spectrometers using dynamic ion optics
US20100288919A1 (en) * 2008-12-15 2010-11-18 Edward William Sheehan Radio Frequency lens for introducing ions into a quadrupole mass analyzer
US20210327700A1 (en) * 2018-08-24 2021-10-21 Dh Technologies Development Pte. Ltd. RF/DC Cutoff to Reduce Contamination and Enhance Robustness of Mass Spectrometry Systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129327A (en) * 1961-12-12 1964-04-14 Bell & Howell Co Auxiliary electrodes for quadrupole mass filters
US3371204A (en) * 1966-09-07 1968-02-27 Bell & Howell Co Mass filter with one or more rod electrodes separated into a plurality of insulated segments

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617736A (en) * 1968-06-19 1971-11-02 Hewlett Packard Co Quadrupole mass filter with electrode structure for fringing-field compensation
US3560734A (en) * 1968-06-26 1971-02-02 Edward F Barnett Quadrupole mass filter with fringing-field penetrating structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129327A (en) * 1961-12-12 1964-04-14 Bell & Howell Co Auxiliary electrodes for quadrupole mass filters
US3371204A (en) * 1966-09-07 1968-02-27 Bell & Howell Co Mass filter with one or more rod electrodes separated into a plurality of insulated segments

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937954A (en) * 1973-03-30 1976-02-10 Extranuclear Laboratories, Inc. Methods and apparatus for spatial separation of AC and DC electric fields, with application to fringe fields in quadrupole mass filters
DE2716287A1 (de) * 1976-06-04 1977-12-08 Finnigan Corp Vielpol-massenfilter
EP0217644A2 (de) * 1985-10-01 1987-04-08 Finnigan Corporation Quadrupolmassenfilter
EP0217644A3 (en) * 1985-10-01 1988-03-16 Finnigan Corporation Quadrupole mass filter
US4814613A (en) * 1987-03-06 1989-03-21 Extrel Corporation Collision cell for triple quadrupole tandem mass spectrometry
US6153880A (en) * 1999-09-30 2000-11-28 Agilent Technologies, Inc. Method and apparatus for performance improvement of mass spectrometers using dynamic ion optics
US20100288919A1 (en) * 2008-12-15 2010-11-18 Edward William Sheehan Radio Frequency lens for introducing ions into a quadrupole mass analyzer
US8258470B2 (en) 2008-12-15 2012-09-04 Edward W Sheehan Radio frequency lens for introducing ions into a quadrupole mass analyzer
US20210327700A1 (en) * 2018-08-24 2021-10-21 Dh Technologies Development Pte. Ltd. RF/DC Cutoff to Reduce Contamination and Enhance Robustness of Mass Spectrometry Systems

Also Published As

Publication number Publication date
FR2128554B1 (de) 1975-10-24
DE2209951A1 (de) 1972-09-21
GB1341357A (en) 1973-12-19
JPS5517465B1 (de) 1980-05-12
FR2128554A1 (de) 1972-10-20

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