EP1055246B1 - Gitter für elektronenröhre mit axialem strahlenbündel - Google Patents

Gitter für elektronenröhre mit axialem strahlenbündel Download PDF

Info

Publication number
EP1055246B1
EP1055246B1 EP99902588A EP99902588A EP1055246B1 EP 1055246 B1 EP1055246 B1 EP 1055246B1 EP 99902588 A EP99902588 A EP 99902588A EP 99902588 A EP99902588 A EP 99902588A EP 1055246 B1 EP1055246 B1 EP 1055246B1
Authority
EP
European Patent Office
Prior art keywords
grid
tube according
skirt
bell
slots
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 - Lifetime
Application number
EP99902588A
Other languages
English (en)
French (fr)
Other versions
EP1055246A1 (de
Inventor
Guy Clerc
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.)
Thales Electron Devices SA
Original Assignee
Thales Electron Devices SA
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 FR9801760A external-priority patent/FR2775117A1/fr
Application filed by Thales Electron Devices SA filed Critical Thales Electron Devices SA
Publication of EP1055246A1 publication Critical patent/EP1055246A1/de
Application granted granted Critical
Publication of EP1055246B1 publication Critical patent/EP1055246B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2225/00—Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons
    • H01J2225/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J2225/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube

Definitions

  • anode 5 provided with a central opening 6.
  • the electrons form a beam (not shown) directed along the axis XX '.
  • the electrons are bundled as soon as they pass through the central opening 6. Beyond the central opening 6, they enter the body of the tube (shown in dotted lines) from the resonant cavity to the collector.
  • the support 9 of the gate 4 is located near the cathode and surrounds it. It is generally made of metal because of its electrical properties because it contributes to transmit the modulation signal to the gate 4.
  • the grid 4 heats on the one hand because of its proximity to the thermoemissive cathode 1 and on the other hand because of the electrons emitted which inevitably strike it.
  • This differential expansion causes stresses on the grid 4 which can deform the perforated zone 7, if the grid is fixed tightly to the support 9 and cause contacting of the gate 4 and the cathode 1 or, at least, a modification of the modulation of the electron beam.
  • the grid according to the invention has the shape of a bell and is mono-material, the bell having a perforated portion at its top, this portion being substantially transverse to the axis of the beam.
  • the grid will preferably be made of pyrolytic graphite because of its thermal, electrical and mechanical properties adapted to this type of application.
  • the grid connection piece may comprise a sleeve around which the grid is fitted.
  • the attachment between the gate and the gate connection piece can be achieved for example by brazing, screwing.
  • FIG. 2 schematically shows a grid 20 mounted in an electron tube with an axial beam 50 directed along the axis XX '. It is assumed that the tube is inductive output (IOT). Only a part of the barrel of the tube is represented, the rest is schematized by dotted lines.
  • the gate 20 has the shape of a bell 22 and is mono-material.
  • This bell 22 has an apex 21 and is extended by a substantially cylindrical skirt to a base 27.
  • the perforated portion 23 of the grid 20, substantially transverse to the axis XX 'of the beam is located at the top 21 of the bell. This perforated portion 23 is intended to be placed facing the active face 41 of the cathode 40 when it is mounted in the barrel of the electron tube.
  • the perforated portion 23 follows the surface of the active portion 41 of the cathode 40 and for this purpose it may be concave, in a bowl, for example substantially spherical.
  • the grid 20 is mono-material from the top 21 of the bell to its base 27. This feature contributes to solving the problem of deformation caused by the differential expansions encountered in the prior art. With such a mono-material bell structure, it is no longer necessary to provide a metal support near the cathode 40 between the perforated portion 23 and the connection part of the gate 24.
  • the base 27 of the bell 22 is fixed to the gate connection piece 24, this piece 24 serving to supply the modulation electric signal applied to the gate 20.
  • the gate connection piece 24 is remote from the cathode 40 and is located near the cathode connection piece 42. In the region of the connecting pieces, the temperature never becomes as intense as at the perforated portion 23 vis-à-vis the active face 41 of the cathode. The harmful effects of the differential expansion between the grid 20 and the connecting part of the grid 24 are not significant on the perforated part 23.
  • the electrically conductive grid connecting part 24 may comprise a sleeve 25 around which the base 27 of the bell 22 engages.
  • the grid 20 and the sleeve 25 can be secured by means of screws 26 which pass through the sleeve 25 and the skirt of the bell 22.
  • screws 26 which pass through the sleeve 25 and the skirt of the bell 22.
  • holes 28 in the skirt of the bell 22 and tappings in the sleeve 25 are provided to receive the screws 26.
  • Figure 3a shows a perspective view of a grid 20 according to the invention with holes 28 in the skirt of the bell 22.
  • the perforated portion 23 is drawn hatched for the sake of clarity. This structure is not limiting.
  • Another type of attachment may consist of a solder of the base 27 of the bell 22 on the gate connection part 24.
  • These slots 30 may not lead to the lower edge of the skirt of the bell 22 but stop before so as to delimit a shim 31 between the base of the bell 22 and the end of the slots 30.
  • Figures 3a, 3b, 3c show several slot configurations 30.
  • the slots 30 have a constant width.
  • the upper part 30.1 is wider than the lower part 30.2 and in FIG. 3c, it is the opposite.
  • These slots 30 and these holes 28 can be made by any known means such as sawing or sandblasting, for example.
  • the gate 20 is advantageously made of pyrolytic graphite which has thermal, mechanical, electrical properties particularly well suited to this application.
  • the techniques for making grids in one-piece pyrolytic graphite are well mastered. Other materials are however usable.
  • the grid connection piece 24 may be made of an electrically and thermally conductive material, typically copper, molybdenum, an iron-nickel-cobalt alloy or the like.
  • the sleeve 25 may also be made of the same materials if it is not in one piece with the rest of the anode connecting piece 24 which is in the form of a collar.
  • dielectric spacers 43 which serve for the electrical insulation and the maintenance mechanical connection between the connecting pieces and therefore the different electrodes concerned.
  • Some electrons passing through the grid 20 at the periphery of the perforated portion 23 may diverge instead of converging towards the axis XX '. They will then strike the anode which decreases the performance of the tube and is not desirable.
  • the skirt 53, the annular portion 52 and the tubular wall 51 reentrant have substantially the same thickness.
  • the length of the tubular wall 51 is adjusted to obtain the focusing action.
  • the tubular wall 51 and the skirt 53 are spaced apart from each other by the annular portion 52.
  • the tubular wall reentrant with respect to the annular portion is shown substantially vertical.
  • the skirt 53 and the tubular wall 51 are two substantially coaxial hollow cylinders mounted one inside the other, the tubular wall 51 being inside the skirt 53.
  • This substantially cylindrical tubular wall 51 plays the role of a wehnelt; it pushes towards the axis XX 'the electrons having passed through the gate at the periphery of the perforated part, it therefore creates an additional focusing effect.
  • a pyrolitic graphite grid configuration does not bring any difficulty of realization.

Landscapes

  • Microwave Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Claims (13)

  1. Elektronenröhre mit axialem Strahl (50), die ein Gitter aufweist, wobei das Gitter einen gelochten Bereich (23) aufweist, der dazu bestimmt ist, nach vorne von den Elektronen des Strahls (50) durchquert zu werden, und im Wesentlichen quer zur Achse (XX') des Strahls angeordnet ist,
    - wobei das Gitter die Form einer Glocke aus einem einzigen Material mit einem Scheitel (21) und einer Schürze (53) hat,
    - wobei der gelochte Bereich (23) am Scheitel der Glocke sich am Boden einer Vertiefung befindet, die von einer rohrförmigen Wand (51) begrenzt wird, die ihren Umfang umrandet,
    dadurch gekennzeichnet, dass:
    das Gitter einen ringförmigen Bereich (52) aufweist und die rohrförmige Wand (51) bezüglich des ganzen ringförmigen Bereichs (52) in die Glocke zurückspringt, wobei der gelochte Bereich mit der Schürze nur über den ringförmigen Bereich (52) verbunden ist, der ihn fest mit der Schürze (53) verbindet und die Schürze von der rohrförmigen Wand abspreizt, wobei die rohrförmige Wand eine Fokussierwirkung auf die Achse der Elektronen hat, die den gelochten Bereich durchquert haben, wobei die Schürze an ihrer Basis an einem elektrisch leitenden Gitteranschlussteil (24) befestigt ist, das sich hinter dem gelochten Bereich befindet.
  2. Röhre nach Anspruch 1, dadurch gekennzeichnet, dass das Gitter aus pyrolytischem Graphit ist.
  3. Röhre nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Gitter aus einem Stück besteht.
  4. Röhre nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der gelochte Bereich (23) konkav ist.
  5. Röhre nach einem der Ansprüche 1 oder 4, dadurch gekennzeichnet, dass die Schürze (53) und die rohrförmige Wand (51) im Wesentlichen koaxial sind, wobei die Wand (51) sich innerhalb der Schürze (53) befindet.
  6. Röhre nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Basis (27) des Gitters um eine Hülse (25) des Gitteranschlussteils (24) herum aufgeschoben werden kann.
  7. Röhre nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Gitter an das Gitteranschlussteil (24) geschraubt ist.
  8. Röhre nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Gitter an das Gitteranschlussteil (24) gelötet ist.
  9. Röhre nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Glocke (22) an ihrer Basis (27) eine Reihe von Schlitzen (30) trägt, die im Wesentlichen gemäß der Achse des Strahls ausgerichtet sind, um eine elastische Kompensation der Ausdehnungsunterschiede zu ermöglichen, die zwischen dem Gitter und dem Gitteranschlussteil (24) auftreten können.
  10. Röhre nach Anspruch 9, dadurch gekennzeichnet, dass das untere Ende der Schlitze (30) vor dem Rand der Basis (27) endet, um eine Distanzleiste (31) zwischen dem Ende der Schlitze (30) und dem Rand der Basis (27) zu begrenzen.
  11. Röhre nach einem der Ansprüche 9 und 10, dadurch gekennzeichnet, dass die Schlitze einen oberen Bereich (30.1) und einen unteren Bereich (30.2) aufweisen, wobei diese beiden miteinander verbundenen Bereiche (30.1, 30.2) unterschiedliche Breiten haben.
  12. Röhre nach einem der Ansprüche 9 und 10, dadurch gekennzeichnet, dass die Schlitze (30) eine konstante Breite haben.
  13. Röhre nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Schürze (53), der ringförmige Bereich (52) und die rohrförmige Wand (51) im Wesentlichen die gleiche Dicke haben.
EP99902588A 1998-02-13 1999-02-12 Gitter für elektronenröhre mit axialem strahlenbündel Expired - Lifetime EP1055246B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9801760A FR2775117A1 (fr) 1998-02-13 1998-02-13 Grille pour tube electronique a faisceau axial a performances ameliorees
FR9801760 1998-02-13
FR9802202A FR2775118B1 (fr) 1998-02-13 1998-02-24 Grille pour tube electronique a faisceau axial a performances ameliorees
FR9802202 1998-02-24
PCT/FR1999/000171 WO1999041762A1 (fr) 1998-02-13 1999-02-12 Grille pour tube electronique a faisceau axial

Publications (2)

Publication Number Publication Date
EP1055246A1 EP1055246A1 (de) 2000-11-29
EP1055246B1 true EP1055246B1 (de) 2006-04-12

Family

ID=26234131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99902588A Expired - Lifetime EP1055246B1 (de) 1998-02-13 1999-02-12 Gitter für elektronenröhre mit axialem strahlenbündel

Country Status (7)

Country Link
US (1) US6635978B1 (de)
EP (1) EP1055246B1 (de)
CN (1) CN100346443C (de)
CA (1) CA2319620C (de)
DE (1) DE69930836D1 (de)
FR (1) FR2775118B1 (de)
WO (1) WO1999041762A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6664720B2 (en) * 2001-04-23 2003-12-16 L-3 Communications Corporation Temperature compensated gun
US8278812B2 (en) * 2008-01-07 2012-10-02 Communications And Power Industries, Inc. Grid for vacuum electron device and method for manufacture of same
FR3042307B1 (fr) * 2015-10-07 2017-11-03 Thales Sa Equilibrage d'un tube a sortie inductive multifaisceau
CN119092388B (zh) * 2024-09-24 2025-11-21 中国科学院空天信息创新研究院 多注行波管电子枪及装配方法

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117251A (en) * 1961-01-26 1964-01-07 Varian Associates Deformable wall tuning means for klystrons
US3453482A (en) * 1966-12-22 1969-07-01 Varian Associates Efficient high power beam tube employing a fly-trap beam collector having a focus electrode structure at the mouth thereof
US3843902A (en) * 1972-08-24 1974-10-22 Varian Associates Gridded convergent flow electron gun
IL43254A (en) * 1972-09-28 1976-02-29 Varian Ass Ciates Gridded electron gun employing a concave cathode emitter
US3818260A (en) * 1973-03-05 1974-06-18 Sperry Rand Corp Electron gun with masked cathode and non-intercepting control grid
GB1514591A (en) * 1976-01-29 1978-06-14 English Electric Valve Co Ltd Electronic valves
GB1534551A (en) * 1976-10-21 1978-12-06 English Electric Valve Co Ltd Electrodes
FR2429490A1 (fr) * 1978-06-23 1980-01-18 Thomson Csf Grille en graphite pyrolytique pour tube electronique de grande puissance, et son procede de montage
US4227116A (en) * 1978-07-24 1980-10-07 Varian Associates, Inc. Zero-bias gridded gun
FR2432215A1 (fr) * 1978-07-27 1980-02-22 Thomson Csf Tube electronique a grille cylindrique en graphite pyrolytique
FR2445605A1 (fr) 1978-12-27 1980-07-25 Thomson Csf Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode
FR2498372A1 (fr) 1981-01-16 1982-07-23 Thomson Csf Cathode a chauffage direct, son procede de fabrication, et tube electronique incorporant une telle cathode
FR2532468A1 (fr) 1982-08-31 1984-03-02 Thomson Csf Perfectionnement aux cathodes a chauffage direct
NL8300191A (nl) * 1983-01-19 1984-08-16 Philips Nv Elektrische ontladingsbuis.
US4745326A (en) * 1986-12-10 1988-05-17 The United States Of America As Represented By The Secretary Of The Navy Method of manufacturing integral shadow gridded controlled porosity, dispenser cathodes
FR2693028A1 (fr) * 1992-06-26 1993-12-31 Thomson Tubes Electroniques Canon à électrons à échauffement réduit de la grille.
GB2281656B (en) * 1993-09-03 1997-04-02 Litton Systems Inc Radio frequency power amplification
GB9420606D0 (en) * 1994-10-12 1994-11-30 Eev Ltd Electron beam tubes
FR2728386B1 (fr) 1994-12-20 1997-01-24 Thomson Tubes Electroniques Tube electronique a grille a performances ameliorees
FR2733856B1 (fr) 1995-05-05 1997-08-29 Thomson Tubes Electroniques Cathode pour canon a electrons a grille, grille destinee a etre associee avec une telle cathode et canon a electrons comportant une telle cathode
US5990622A (en) * 1998-02-02 1999-11-23 Litton Systems, Inc. Grid support structure for an electron beam device

Also Published As

Publication number Publication date
WO1999041762A1 (fr) 1999-08-19
CA2319620A1 (fr) 1999-08-19
DE69930836D1 (de) 2006-05-24
FR2775118A1 (fr) 1999-08-20
CN1290398A (zh) 2001-04-04
CA2319620C (fr) 2010-08-03
CN100346443C (zh) 2007-10-31
FR2775118B1 (fr) 2000-05-05
EP1055246A1 (de) 2000-11-29
HK1036148A1 (zh) 2001-12-21
US6635978B1 (en) 2003-10-21

Similar Documents

Publication Publication Date Title
FR2527005A1 (fr) Tube electronique de puissance a grille perfectionne
EP0982976A1 (de) Auf hohen thermischen Belastungen abgestimmter Plasmamotor mit geschlossenem Elektronendrift
EP1055246B1 (de) Gitter für elektronenröhre mit axialem strahlenbündel
FR2760127A1 (fr) Canon a electrons et klystron le comportant
EP0037309B1 (de) Wanderfeldröhre mit aus gekoppelten Hohlräumen bestehender Verzögerungsleitung und mit periodischer permanentmagnetischer Fokussierung und Verstärkereinheit mit einer solchen Röhre
FR3069368A1 (fr) Canon a electrons
EP0824758B1 (de) Eletronenkanone mit gitter
FR2929754A1 (fr) Collecteur et tube electronique
FR2775117A1 (fr) Grille pour tube electronique a faisceau axial a performances ameliorees
EP3764386A1 (de) Ringförmige kathode für elektronische röhre
FR2877489A1 (fr) Canon a electrons
FR2691285A1 (fr) Système de focalisation à aimants permanents périodiques à géométrie X-Z.
FR2641414A1 (fr) Tube a faisceau d'electrons refroidi partiellement par rayonnement direct
EP0003937B1 (de) Kathode für eine Elektronenkanone
FR2691012A1 (fr) Canon de pierce à électrode d'échelonnement.
EP1292963A1 (de) Kathode mit optimiertem thermischen wirkungsgrad
WO2009083540A1 (fr) Protection d'une electrode de tube electronique
EP0173618A1 (de) Induktor mit magnetischem Joch für eine Anlage zur Herstellung von Glasfasern
EP0007865B1 (de) Elektronenröhre mit einer zylindrischen, aus pyrolytischem Graphit bestehenden, Gitterelektrode
FR2790595A1 (fr) Circuit de ligne a retard en helice
FR2741997A1 (fr) Structure de cathode pour tube a rayons cathodiques
FR2566959A1 (fr) Dispositif de fixation d'une grille en graphite pyrolytique sur l'embase d'un tube electronique
BE474063A (de)
EP0020218A1 (de) Strahlungsgekühlter, mit erniedrigtem Potential vorgespannter Mehrstufenkollektor für eine Mikrowellenröhre und Mikrowellenröhre mit einem solchen Kollektor
FR2786022A1 (fr) Tube electronique multifaisceau a interception des electrons minimisee

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: 20000810

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20050113

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THALES ELECTRON DEVICES S.A.

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

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

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20060412

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 69930836

Country of ref document: DE

Date of ref document: 20060524

Kind code of ref document: P

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060713

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060727

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

26N No opposition filed

Effective date: 20070115

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

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

Ref country code: FR

Payment date: 20150210

Year of fee payment: 17

Ref country code: GB

Payment date: 20150211

Year of fee payment: 17

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160212

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20161028

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160229

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160212