FR2283547A2 - Spatial separation of AC and DC fields in quadrupole mass filter - using material acting as dielectric to AC and conductor to DC fields - Google Patents

Spatial separation of AC and DC fields in quadrupole mass filter - using material acting as dielectric to AC and conductor to DC fields

Info

Publication number
FR2283547A2
FR2283547A2 FR7525811A FR7525811A FR2283547A2 FR 2283547 A2 FR2283547 A2 FR 2283547A2 FR 7525811 A FR7525811 A FR 7525811A FR 7525811 A FR7525811 A FR 7525811A FR 2283547 A2 FR2283547 A2 FR 2283547A2
Authority
FR
France
Prior art keywords
fields
quadrupole mass
mass filter
dielectric
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7525811A
Other languages
French (fr)
Other versions
FR2283547B2 (en
Inventor
Wade L Fite
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Extrel CMS LLC
Original Assignee
Extrel CMS LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/502,158 external-priority patent/US3937954A/en
Application filed by Extrel CMS LLC filed Critical Extrel CMS LLC
Publication of FR2283547A2 publication Critical patent/FR2283547A2/en
Application granted granted Critical
Publication of FR2283547B2 publication Critical patent/FR2283547B2/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/02—Details
    • H01J49/06—Electron- or ion-optical arrangements

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Tubes For Measurement (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

The method for spatially separating AC and DC electric fringe fields near the ends of quadrupole mass filters involves use of materials with electric properties that function as dielectrics to the AC fields and as conductors to the DC fields. Devices constructed of such materials shield against DC fringe fields, but not against AC fringe fields. Such devices include a small shield in the form of a tube or other appropriate configuration disposed coaxially with the axis of the mass filter at either or both ends of it. A good dielectric is used as the supporting structure and a thin conductive or semi-conductive layer is applied to it and functions as the shield.
FR7525811A 1974-08-30 1975-08-20 Spatial separation of AC and DC fields in quadrupole mass filter - using material acting as dielectric to AC and conductor to DC fields Granted FR2283547A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/502,158 US3937954A (en) 1973-03-30 1974-08-30 Methods and apparatus for spatial separation of AC and DC electric fields, with application to fringe fields in quadrupole mass filters

Publications (2)

Publication Number Publication Date
FR2283547A2 true FR2283547A2 (en) 1976-03-26
FR2283547B2 FR2283547B2 (en) 1978-04-28

Family

ID=23996603

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7525811A Granted FR2283547A2 (en) 1974-08-30 1975-08-20 Spatial separation of AC and DC fields in quadrupole mass filter - using material acting as dielectric to AC and conductor to DC fields

Country Status (4)

Country Link
JP (1) JPS5833660B2 (en)
CA (1) CA1046169A (en)
DE (1) DE2538452A1 (en)
FR (1) FR2283547A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1134957A (en) * 1979-08-03 1982-11-02 Mds Health Group Limited Tandem mass spectrometer with synchronized rf fields
CA1134956A (en) * 1979-08-03 1982-11-02 John B. French Tandem mass spectrometer with open structure ac-only rod sections, and method of operating a mass spectrometer system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867632A (en) * 1973-03-30 1975-02-18 Extranuclear Lab Inc Methods and apparatus for spatial separation of AC and DC electrical fields with application to fringe fields in quadrupole mass filters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
DE2538452A1 (en) 1976-04-08
FR2283547B2 (en) 1978-04-28
JPS5150784A (en) 1976-05-04
CA1046169A (en) 1979-01-09
JPS5833660B2 (en) 1983-07-21

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