GB1189716A - Improvements in or relating to Ion Gettering Pumps for Velocity-Modulated Tubes. - Google Patents

Improvements in or relating to Ion Gettering Pumps for Velocity-Modulated Tubes.

Info

Publication number
GB1189716A
GB1189716A GB3631967A GB3631967A GB1189716A GB 1189716 A GB1189716 A GB 1189716A GB 3631967 A GB3631967 A GB 3631967A GB 3631967 A GB3631967 A GB 3631967A GB 1189716 A GB1189716 A GB 1189716A
Authority
GB
United Kingdom
Prior art keywords
electrode
electron beam
velocity
ion
modulated
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
GB3631967A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1189716A publication Critical patent/GB1189716A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/027—Collectors
    • 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
    • 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

  • Physical Or Chemical Processes And Apparatus (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

1,189,716. Velocity-modulated tubes; ion pumps. SIEMENS A.G. 8 Aug., 1967 [9 Aug., 1966], No. 36319/67. Heading H1D. In a velocity-modulated tube having a magnetically focused electron beam 1 and a collector which is magnetically screened-as shown, by iron cylinder 3-an ion getter pump is formed by the ionizing action of the electron beam in the interaction region of the tube, and by an ion trap formed by an electrode of gettering material in the form of a hollow cylinder of perforated mesh mounted coaxially within the collector. As shown, the gettering electrode 4 is of titanium, held at a small positive potential, and is coaxially mounted within a cylinder 5 which is formed by an extension of a delay line, and upon the inner surface of which atomized gettering material from the mesh electrode 4 is deposited. Preferably, the perforations in electrode 4 exceed in total area the intervening wall portions; the separate perforations are each at least as large as the cross-section of the electron beam; the spacing between the electrodes 4 and 5 is at least 1 cm. and electrode 5 is held at such a positive potential that its field penetrates through the mesh electrode to the boundary of the electron beam.
GB3631967A 1966-08-09 1967-08-08 Improvements in or relating to Ion Gettering Pumps for Velocity-Modulated Tubes. Expired GB1189716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0105266 1966-08-09

Publications (1)

Publication Number Publication Date
GB1189716A true GB1189716A (en) 1970-04-29

Family

ID=7526434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3631967A Expired GB1189716A (en) 1966-08-09 1967-08-08 Improvements in or relating to Ion Gettering Pumps for Velocity-Modulated Tubes.

Country Status (3)

Country Link
DE (1) DE1541049A1 (en)
GB (1) GB1189716A (en)
NL (1) NL6706488A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2740607B1 (en) * 1995-10-27 1997-11-21 Commissariat Energie Atomique IONIC PUMP WITH ADJUSTED ANODE

Also Published As

Publication number Publication date
NL6706488A (en) 1968-02-12
DE1541049A1 (en) 1970-01-08

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees