GB1187376A - Field Ionisation Source - Google Patents

Field Ionisation Source

Info

Publication number
GB1187376A
GB1187376A GB1659067A GB1659067A GB1187376A GB 1187376 A GB1187376 A GB 1187376A GB 1659067 A GB1659067 A GB 1659067A GB 1659067 A GB1659067 A GB 1659067A GB 1187376 A GB1187376 A GB 1187376A
Authority
GB
United Kingdom
Prior art keywords
wire
april
emitter
mass
ionisation source
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.)
Expired
Application number
GB1659067A
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.)
Varian Mat GmbH
Original Assignee
Varian Mat GmbH
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
Application filed by Varian Mat GmbH filed Critical Varian Mat GmbH
Publication of GB1187376A publication Critical patent/GB1187376A/en
Expired 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
    • H01J49/02—Details
    • H01J49/10—Ion sources; Ion guns
    • H01J49/16—Ion sources; Ion guns using surface ionisation, e.g. field-, thermionic- or photo-emission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J27/00—Ion beam tubes
    • H01J27/02—Ion sources; Ion guns
    • H01J27/26—Ion sources; Ion guns using surface ionisation, e.g. field effect ion sources, thermionic ion sources

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

1,187,376. Mass spectrometers. VARIAN MAT G.m.b.H. 11 April, 1967 [30 April, 1966], No. 16590/67. Addition to 1,052.902. Heading H1D. In a field-ionization source for a mass spectrometer comprising a wire-shaped emitter with an elongated arched emission surface, provision is made for heating the emitter in order to destroy layers of condensate formed on the surface of the wire and so to reduce the occurrence of fragment ions in the mass spectrum. The wire may be heated by passing an adjustable direct current, of, e.g., 0À85 mA, through it or by irradiaticn. A Wollaston wire of 2À5 Á diameter and 5 mm. free length is used. The general source arrangement is as shown in the parent Specification.
GB1659067A 1966-04-30 1967-04-11 Field Ionisation Source Expired GB1187376A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1966B0086915 DE1302015B (en) 1966-04-30 1966-04-30 Field emission ion source, especially for mass spectrometers

Publications (1)

Publication Number Publication Date
GB1187376A true GB1187376A (en) 1970-04-08

Family

ID=6983577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1659067A Expired GB1187376A (en) 1966-04-30 1967-04-11 Field Ionisation Source

Country Status (2)

Country Link
DE (1) DE1302015B (en)
GB (1) GB1187376A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3657531A1 (en) * 2018-11-21 2020-05-27 Jeol Ltd. Mass spectrometry apparatus, gas chromatograph-mass spectrometry apparatus, and flashing current control apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3657531A1 (en) * 2018-11-21 2020-05-27 Jeol Ltd. Mass spectrometry apparatus, gas chromatograph-mass spectrometry apparatus, and flashing current control apparatus
US11474084B2 (en) 2018-11-21 2022-10-18 Jeol Ltd. Mass spectrometry apparatus, gas chromatograph-mass spectrometry apparatus, and flashing current control apparatus

Also Published As

Publication number Publication date
DE1302015B (en) 1969-09-25

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Legal Events

Date Code Title Description
PS Patent sealed
PE Patent expired