EP0156003B1 - Electron gun for an electron tube, especially for a travelling-wave tube - Google Patents

Electron gun for an electron tube, especially for a travelling-wave tube Download PDF

Info

Publication number
EP0156003B1
EP0156003B1 EP84114708A EP84114708A EP0156003B1 EP 0156003 B1 EP0156003 B1 EP 0156003B1 EP 84114708 A EP84114708 A EP 84114708A EP 84114708 A EP84114708 A EP 84114708A EP 0156003 B1 EP0156003 B1 EP 0156003B1
Authority
EP
European Patent Office
Prior art keywords
electron
cathode
tube
electron gun
cathode holder
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
EP84114708A
Other languages
German (de)
French (fr)
Other versions
EP0156003A1 (en
Inventor
Erwin Dr. rer. nat. Hübner
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 EP0156003A1 publication Critical patent/EP0156003A1/en
Application granted granted Critical
Publication of EP0156003B1 publication Critical patent/EP0156003B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/026—Eliminating deleterious effects due to thermal effects, electric or magnetic field
    • 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
    • H01J23/04—Cathodes

Definitions

  • Beam generator system for electron tubes, in particular traveling wave tubes are Beam generator system for electron tubes, in particular traveling wave tubes.
  • the invention relates to a jet generator system according to the preamble of claim 1.
  • a jet generator system is known from US-A-3 100273.
  • a beam generator system with a beam-shaping electrode and a supply cathode of cylindrical shape with a front-side emission surface for electron beam tubes formed by a porous body is known from DE-A-1 963333.
  • the invention has for its object to prevent a change in position of the supply cathode in the beam-shaping electrode at different ambient temperatures in a beam generator system and thus to avoid beam defocusing.
  • the cathode holder is preferably made of tantalum or molybdenum.
  • the supply cathode is now connected directly below the emission disk directly to the beam-shaping electrode designed as a Wehnelt cylinder. This is advantageously accomplished with the aid of a disk into which shields are stamped radially.
  • the stationary webs are alternately deflected upwards and downwards in a straight division. In the event of temperature fluctuations, the expansions (contractions) occurring in the radial direction are absorbed by the webs deflected upwards and downwards.
  • heat movement differences between the supply cathode and the Wehnelt cylinder then do not occur in the axial direction.
  • FIG. 2 shows a schematic side view, partly in section, of the jet generator system according to FIG. 1.
  • the beam generator system shown in FIGS. 1 and 2 essentially consists of the supply cathode 1, which is connected below the emission disc 2 by a radial cathode holder 3 directly to the beam-shaping electrode 4, in this exemplary embodiment a Wehnelt cylinder.
  • the connections for the indirect heating of the supply cathode 1 are provided with the reference number 5.
  • the cathode holder 3 is preferably in the form of a disk into which slots are radially stamped. The standing webs are alternately deflected downwards and upwards in a straight division.
  • the supply cathode 1 is fastened to the disk, which is provided with webs and serves as the cathode holder 3, by means of rings 7, 8.
  • rings 7, 8 For fastening the disc in the Wehnelt cylinder. (beam-shaping electrode 4) a fastening ring 6 is provided.
  • Metals with a high melting point such as tantalum or molybdenum are used as the material for the disk serving as

Description

Strahlerzeugersystem für Elektronenröhren, insbesondere Wanderfeldröhren.Beam generator system for electron tubes, in particular traveling wave tubes.

Die Erfindung betrifft ein Strahlerzeugersystem nach dem Oberbegriff des Anspruchs 1. Ein derartiges Strahlerzeugersystem geht aus der US-A-3 100273 als bekannt hervor.The invention relates to a jet generator system according to the preamble of claim 1. Such a jet generator system is known from US-A-3 100273.

Weiterhin ist ein Strahlerzeugersystem mit einer strahlformenden Elektrode und einer Vorratskathode von zylindrischer Form mit einer von einem porösen Körper gebildeten stirnseitigen Emissionsfläche für Elektronenstrahlröhren aus der DE-A-1 963333 bekannt.Furthermore, a beam generator system with a beam-shaping electrode and a supply cathode of cylindrical shape with a front-side emission surface for electron beam tubes formed by a porous body is known from DE-A-1 963333.

Bislang wurde ausserdem versucht, durch geeignete Materialauswahl bzw. Materialkombinationen der im System axial stehenden Befestigungsfolien eine Lagekonstanz der Vorratskathode in einem als strahlformende Elektrode verwendeten Wehnelt-Zylinder bei verschiedenen Betriebstemperaturen zu erreichen.To date, attempts have also been made to achieve a positional stability of the supply cathode in a Wehnelt cylinder used as a beam-shaping electrode at various operating temperatures by means of a suitable choice of material or combinations of materials for the fastening foils axially positioned in the system.

Die bisher verwendeten axialen Befestigungselemente der Vorratskathode im Wehnelt-Zylinder geben bei verschiedenen Umgebungstemperaturen Anlass zu Positionsänderungen der Vorratskathode im Wehnelt-Zylinder und damit zur Strahldefokussierung.The previously used axial fastening elements of the supply cathode in the Wehnelt cylinder give rise to changes in position of the supply cathode in the Wehnelt cylinder at different ambient temperatures and thus to beam defocusing.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Strahlerzeugersystem eine Positionsänderung der Vorratskathode in der strahlformenden Elektrode bei verschiedenen Umgebungstemperaturen zu unterbinden und damit eine Strahldefokussierung zu vermeiden.The invention has for its object to prevent a change in position of the supply cathode in the beam-shaping electrode at different ambient temperatures in a beam generator system and thus to avoid beam defocusing.

Diese Aufgabe wird erfindungsgemäss durch ein Strahlerzeugersystem mit den Merkmalen des Anspruchs 1 gelöst.According to the invention, this object is achieved by a jet generator system having the features of claim 1.

Die Kathodenhalterung besteht dabei vorzugsweise aus Tantal oder Molybdän.The cathode holder is preferably made of tantalum or molybdenum.

Die Vorratskathode ist nunmehr unmittelbar unterhalb der Emissionsscheibe direkt mit der strahlformenden als Wehnelt-Zylinder ausgebildeten Elektrode verbunden. Dies wird vorteilhaft mit Hilfe einer Scheibe bewerkstelligt, in die radial Schiltze eingestanzt sind. Die stehenbleibenden Stege werden bei gerader Teilung abwechselnd nach oben und nach unten ausgelenkt. Bei Temperaturschwankungen werden dadurch die in radialer Richtung auftretenden Ausdehnungen (Zusammenziehungen) von den nach oben und unten ausgelenkten Stegen aufgenommen. Bei symmetrischer Steganordnung und homogener Materialbeschaffenheit der Emissionsscheibe treten dann Wärmebewegungsdifferenzen zwischen Vorratskathode und dem Wehnelt-Zylinder in axialer Richtung nicht auf.The supply cathode is now connected directly below the emission disk directly to the beam-shaping electrode designed as a Wehnelt cylinder. This is advantageously accomplished with the aid of a disk into which shields are stamped radially. The stationary webs are alternately deflected upwards and downwards in a straight division. In the event of temperature fluctuations, the expansions (contractions) occurring in the radial direction are absorbed by the webs deflected upwards and downwards. With a symmetrical web arrangement and homogeneous material properties of the emission disk, heat movement differences between the supply cathode and the Wehnelt cylinder then do not occur in the axial direction.

Die Erfindung wird anhand eines bevorzugten Ausführungsbeispiels weiter erläutert. Einander entsprechende Teile sind in den Figuren mit den gleichen Bezugszeichen versehen. Teile, die nicht unbedingt zum Verständnis der Erfindung beitragen, sind in den Figuren unbezeichnet oder weggelassen. Es zeigen:The invention is further explained on the basis of a preferred exemplary embodiment. Corresponding parts are provided with the same reference symbols in the figures. Parts which do not necessarily contribute to an understanding of the invention are not shown in the figures or are omitted. Show it:

Fig. das schematisch teilweise im Schnitt dargestellte Strahlerzeugersystem gemäss der Erfindung undFig. The schematically shown partially in section beam generator system according to the invention and

Fig.2 eine Seitenansicht schematisch teilweise im Schnitt des Strahlerzeugersystems nach Fig. 1.2 shows a schematic side view, partly in section, of the jet generator system according to FIG. 1.

Das in den Figuren 1 und 2 dargestellte Strahlerzeugersystem besteht im wesentlichen aus der Vorratskathode 1, die unterhalb der Emissionsscheibe 2 durch eine radiale Kathodenhalterung 3 direkt mit der strahlformenden Elektrode 4, in diesem Ausführungsbeispiel einem Wehnelt-Zylinder verbunden ist. Die Anschlüsse für die indirekte Heizung der Vorratskathode 1 sind mit dem Bezugszeichen 5 versehen. Die Kathodenhalterung 3 hat vorzugsweise die Form einer Scheibe, in die radial Schlitze eingestanzt sind. Die stehenbleibenden Stege sind bei gerader Teilung abwechselnd nach unten und oben ausgelenkt. Die Vorratskathode 1 ist an der als Kathodenhalterung 3 dienenden, mit Stegen versehenen Scheibe mittels Ringen 7, 8 befestigt. Zur Befestigung der Scheibe im Wehnelt-Zylinder. (strahlformende Elektrode 4) ist ein Befestigungsring 6 vorgesehen. Als Material für die als Kathodenhalterung 3 dienende Scheibe finden Metalle mit hohem Schmelzpunkt wie Tantal oder Molybdän Verwendung.The beam generator system shown in FIGS. 1 and 2 essentially consists of the supply cathode 1, which is connected below the emission disc 2 by a radial cathode holder 3 directly to the beam-shaping electrode 4, in this exemplary embodiment a Wehnelt cylinder. The connections for the indirect heating of the supply cathode 1 are provided with the reference number 5. The cathode holder 3 is preferably in the form of a disk into which slots are radially stamped. The standing webs are alternately deflected downwards and upwards in a straight division. The supply cathode 1 is fastened to the disk, which is provided with webs and serves as the cathode holder 3, by means of rings 7, 8. For fastening the disc in the Wehnelt cylinder. (beam-shaping electrode 4) a fastening ring 6 is provided. Metals with a high melting point such as tantalum or molybdenum are used as the material for the disk serving as the cathode holder 3.

Claims (2)

1. Electron gun systems for electron tubes, in particular travelling wave tubes, comprising a Wehnelt cylinder as a beam-forming electrode (4) and a supply cathode (1) arranged coaxially in the Wehnelt cylinder and directly connected to the beam-forming electrode (4) by a radial cathode holder (3), characterised in that the supply cathode (1) contains a cylindrical carrier provided on its front face with an emission plate (2) and directly connected by the radial cathode holder (3) to the beam-forming electrode (4), where the cathode holder (3) consists of a plate into which radial slots are stamped and the residual links are alternately deflected upwards and downwards in a symmetrical arrangement.
2. An electron gun system as claimed in Claim 1, characterised in that the cathode holder (3) consists of tantalum or molybdenum.
EP84114708A 1984-02-29 1984-12-04 Electron gun for an electron tube, especially for a travelling-wave tube Expired EP0156003B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3407434A DE3407434A1 (en) 1984-02-29 1984-02-29 RADIATOR GENERATOR SYSTEM FOR ELECTRONIC TUBES, IN PARTICULAR WALKER TUBES
DE3407434 1984-02-29

Publications (2)

Publication Number Publication Date
EP0156003A1 EP0156003A1 (en) 1985-10-02
EP0156003B1 true EP0156003B1 (en) 1988-03-09

Family

ID=6229209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114708A Expired EP0156003B1 (en) 1984-02-29 1984-12-04 Electron gun for an electron tube, especially for a travelling-wave tube

Country Status (4)

Country Link
US (1) US4644219A (en)
EP (1) EP0156003B1 (en)
JP (1) JPS60211739A (en)
DE (2) DE3407434A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5534747A (en) * 1994-05-13 1996-07-09 Litton Systems, Inc. Variable focus electron gun assembly with ceramic spacers
FR2965971B1 (en) * 2010-10-06 2012-11-16 Thales Sa PROGRESSIVE WAVE TUBE WITH IMPROVED CANON ALIGNMENT WITH THE TUBE HYPERFREQUENCY STRUCTURE AND METHOD OF MANUFACTURING SUCH TUBE
WO2015101537A1 (en) 2013-12-30 2015-07-09 Mapper Lithography Ip B.V. Cathode arrangement, electron gun, and lithography system comprising such electron gun
NL2015039B1 (en) * 2013-12-30 2016-07-08 Mapper Lithography Ip Bv Focusing electrode for cathode arrangement, electron gun, and lithography system comprising such electron gun.
DE102018123100A1 (en) * 2018-09-20 2020-03-26 Thales Deutschland GmbH Electron Devices Electron gun

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE410992A (en) * 1934-08-30
US2146365A (en) * 1934-12-13 1939-02-07 John C Batchelor Electron emitter
DE715185C (en) * 1937-02-14 1941-12-16 Manfred Von Ardenne Arrangement for holding the glow cathode in Braun tubes
GB564546A (en) * 1942-11-02 1944-10-03 Gerhard Liebmann Improvements in or relating to cathode ray tubes
FR1102574A (en) * 1954-04-08 1955-10-24 Soc Nouvelle Outil Rbv Radio Improvements to electron gun structures for film tubes
GB802108A (en) * 1956-01-20 1958-10-01 Rank Cintel Ltd Improvements in or relating to electron guns for cathode ray tubes
NL248618A (en) * 1959-02-19
US3100273A (en) * 1960-07-05 1963-08-06 Raytheon Co Cathode support
DE1223063B (en) * 1965-06-30 1966-08-18 Siemens Ag Indirectly heated cathode for electrical discharge vessels and process for temperature control of the cathode
DE1963333C3 (en) * 1969-12-17 1973-12-13 Siemens Ag, 1000 Berlin U. 8000 Muenchen Jet generator system and process for its manufacture
US3746087A (en) * 1971-04-19 1973-07-17 Varian Associates Heat dissipation device
FR2251096B1 (en) * 1973-11-13 1977-08-19 Thomson Csf
US3963955A (en) * 1974-04-15 1976-06-15 Varian Associates Means and method for suppressing oscillations in electron guns
US3983442A (en) * 1975-05-19 1976-09-28 Westinghouse Electric Corporation Electron gun cathode support structure
FR2458139A1 (en) * 1979-05-31 1980-12-26 Thomson Csf INSULATED COLLECTOR FOR ELECTRONIC POWER TUBE AND TUBE EQUIPPED WITH SUCH A COLLECTOR
US4298818A (en) * 1979-08-29 1981-11-03 Rca Corporation Electron gun
NL8002343A (en) * 1980-04-23 1981-11-16 Philips Nv ELECTRON GUN AND CATHODE JET CONTAINING SUCH ELECTRON GUN.
US4504762A (en) * 1982-06-25 1985-03-12 Hughes Aircraft Company Buffer for an electron beam collector

Also Published As

Publication number Publication date
DE3469826D1 (en) 1988-04-14
DE3407434A1 (en) 1985-08-29
JPS60211739A (en) 1985-10-24
US4644219A (en) 1987-02-17
EP0156003A1 (en) 1985-10-02

Similar Documents

Publication Publication Date Title
DE19903872C2 (en) X-ray tube with spring focus for enlarged resolution
EP0596830B1 (en) Plasma spray gun
DE1963389C3 (en) Electron gun system
WO1992018758A1 (en) Device for the catalytic decontamination of exhaust gases
CH693083A5 (en) Nozzle and nozzle assembly for a burner head of a plasma spray device.
EP0156003B1 (en) Electron gun for an electron tube, especially for a travelling-wave tube
DE1764860B1 (en) ELECTRON BEAM GENERATORS AND METHOD FOR ITS PRODUCTION
DE1195872B (en) Cathode control electrode arrangement for a beam generation system of a cathode ray tube
CH639798A5 (en) X-ray tube with an electron gun.
DE2210160C3 (en) Electron gun system for time-of-flight tubes
DE2901681B2 (en) X-ray tube
DE2709547C2 (en) Rotating anode for an X-ray tube
DE2237855B2 (en) X-ray tube rotating anode
DE69626741T2 (en) Linear beam microwave tube with a planar cold cathode as an electron beam source
DE3909504A1 (en) METHOD FOR THE PRODUCTION OF WALKING WAVE TUBES, IN PARTICULAR FOR THE PRODUCTION OF AN ARRANGEMENT FOR SLOW WAVES, AND AN ARRANGEMENT PRODUCED BY IT
DE2354339C3 (en) Method of assembling electron guns
DE2647727C2 (en)
DE2745183C2 (en)
DE1162003B (en) Device for generating a bundled flow of charged particles
DE3438520A1 (en) Electron collector for a travelling wave tube, and a travelling wave tube having such an electron collector
DE3611111A1 (en) ROTATABLE ANODE X-RAY SOURCE
DE1006532B (en) Glow cathode for magnetron tubes
DE2422884C2 (en) Holder for the electrodes of an electron beam generation system within the vacuum envelope of a microwave tube
DE2606897C3 (en) Electron gun of a cathode ray tube
DE2946386C2 (en) Rotating anode for an X-ray tube

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19841221

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17Q First examination report despatched

Effective date: 19861023

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

REF Corresponds to:

Ref document number: 3469826

Country of ref document: DE

Date of ref document: 19880414

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890223

Year of fee payment: 5

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19891130

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19891221

Year of fee payment: 6

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19891231

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19901204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910701

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910830

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST