GB949637A - Improved getter-ion vacuum pumps - Google Patents

Improved getter-ion vacuum pumps

Info

Publication number
GB949637A
GB949637A GB32575/61A GB3257561A GB949637A GB 949637 A GB949637 A GB 949637A GB 32575/61 A GB32575/61 A GB 32575/61A GB 3257561 A GB3257561 A GB 3257561A GB 949637 A GB949637 A GB 949637A
Authority
GB
United Kingdom
Prior art keywords
ion
chamber
envelope
insulator
getter
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
GB32575/61A
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 Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Associates Inc filed Critical Varian Associates Inc
Publication of GB949637A publication Critical patent/GB949637A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/12—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
    • H01J41/18—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of cold cathodes
    • H01J41/20—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of cold cathodes using gettering substances

Landscapes

  • Electron Tubes For Measurement (AREA)

Abstract

949,637. Ion-getter pumps. VARIAN ASSOCIATES. Sept. 11, 1961 [Oct. 3, 1960], No. 32575/61. Heading H1D. An ion-getter pump apparatus comprises a plurality of lesser chambers 33 communicating with a central hollow chamber 32 which is connected to the structure to be evacuated, the lesser chambers having a reactive cathode structure and an anode structure 39, wherein means are provided for applying a high potential to the anode, the means including a high voltage lead 40 protected by an insulator 43, the insulator and a portion of the high voltage lead being located wholly within a recessed portion 44 of the wall of the envelope. The recessed portion preferably comprises an open-ended cylinder which is attached to the rest of the wall of the envelope so that either the cylinder extends wholly within the central chamber, or a part of it extends without the chamber as shown. A magnetic field is provided within the lesser chambers by a plurality of ferrite elements 51.
GB32575/61A 1960-10-03 1961-09-11 Improved getter-ion vacuum pumps Expired GB949637A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60156A US3084848A (en) 1960-10-03 1960-10-03 Improved vacuum pumps

Publications (1)

Publication Number Publication Date
GB949637A true GB949637A (en) 1964-02-19

Family

ID=22027727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32575/61A Expired GB949637A (en) 1960-10-03 1961-09-11 Improved getter-ion vacuum pumps

Country Status (3)

Country Link
US (1) US3084848A (en)
DE (1) DE1179325B (en)
GB (1) GB949637A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400349A (en) * 1966-01-14 1968-09-03 Varian Associates U-shaped magnetic circuit including three permanent magnets separated by pole pieces
US3376455A (en) * 1966-02-28 1968-04-02 Varian Associates Ionic vacuum pump having multiple externally mounted magnetic circuits

Also Published As

Publication number Publication date
DE1179325B (en) 1964-10-08
US3084848A (en) 1963-04-09

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