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EP0361047B1 - Tube à onde progressive - Google Patents

Tube à onde progressive Download PDF

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Publication number
EP0361047B1
EP0361047B1 EP89114853A EP89114853A EP0361047B1 EP 0361047 B1 EP0361047 B1 EP 0361047B1 EP 89114853 A EP89114853 A EP 89114853A EP 89114853 A EP89114853 A EP 89114853A EP 0361047 B1 EP0361047 B1 EP 0361047B1
Authority
EP
European Patent Office
Prior art keywords
hollow cylinder
electron beam
bore
temperature
catcher
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
EP89114853A
Other languages
German (de)
English (en)
Other versions
EP0361047A2 (fr
EP0361047A3 (fr
Inventor
Josef Ing.Grad. Hauser
Peter Ing. Mammach
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
Thomson Tubes Electroniques
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 Thomson Tubes Electroniques filed Critical Thomson Tubes Electroniques
Publication of EP0361047A2 publication Critical patent/EP0361047A2/fr
Publication of EP0361047A3 publication Critical patent/EP0361047A3/fr
Application granted granted Critical
Publication of EP0361047B1 publication Critical patent/EP0361047B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J23/033—Collector cooling devices

Definitions

  • the present invention relates to a delay tube according to the preamble of claim 1.
  • a delay tube is known from DE-A-22 13 185.
  • a centering possibility is provided there, in that at least part of a bore in the cooling housing is filled with the highly thermally conductive insulating mass after the introduction of the electron beam collector after the electron beam collector has been adjusted in the radial direction in the bore.
  • the electrical dielectric strength of the material is not fully utilized, since when the catcher is adjusted in the circumferential direction, different wall thicknesses arise in the insulating mass introduced. There is also the risk of gas inclusions when the mass is introduced, which leads to voltage failures.
  • the object on which the present invention is based consists in a voltage-resistant and good heat-conducting connection of the interceptor to the cooling housing of a delay tube, in particular a traveling wave tube according to the preamble of claim 1, which is designed to be particularly temperature-resistant and easy to manufacture.
  • the cylinder should consist of an elastic material that can be compressed in the radial direction.
  • the cylinder is to be pressed through the wall of the bore and pressed against the electron beam collector. This is to ensure a mechanically firm connection between the housing, the cylinder and the electron beam collector. This applies to the entire temperature range, even in the case of rapid temperature changes.
  • the temperature range for such pipes is, for example, 300 ° C., so that perfect adhesion and very good heat conduction between the three parts described must be ensured at least between room temperature and 300 ° C.
  • Suitable materials for the cylinder are temperature-resistant rubber-elastic materials, elastic materials with low porosity and low hardness.
  • Rubber-elastic fabrics elastically deflect in any direction different from the direction of pressure when one-sided pressure is applied. Boron nitride proved to be particularly suitable.
  • This fabric has the required elasticity, remains dimensionally stable up to over 300 ° C (even up to 1000 ° C), is highly insulating and can be compressed in the required direction in the radial direction. It also has a particularly high thermal conductivity and is so soft that it can be pressed into the roughness of the adjacent surfaces and thus ensures that there is only a negligible thermal resistance at the transition to the adjacent materials.
  • a method is particularly suitable for producing an object according to the invention in which the inside diameter of the cylinder is chosen to be somewhat larger than the outside diameter of the electron beam receiver, in which the diameter of the bore is chosen to be somewhat smaller than the outside diameter of the cylinder in which the cylinder is placed on the electron beam receiver is pushed and maintained at a first temperature at which the housing is heated to a higher temperature than the first temperature, so that at the higher temperature the diameter of the bore is larger than the outer diameter of the cylinder and at which the electron beam receiver with the cylinder is inserted into the hole in the heated housing.
  • an arrangement manufactured according to the proposed method differs significantly from arrangements in which a cylinder is held by a clamping process, which compresses the bore in the cooling housing.
  • a deformation of the housing is basically generated in the area of the bore, whereby the cylinder is to be clamped. This deformation of the housing results in at least an uneven voltage distribution in the cylinder, which already causes an asymmetry in the heat dissipation and in the dielectric strength.
  • European patent EP-A-0 259 606 describes an electron beam collector for runtime tubes which is surrounded by a metallic vacuum envelope and wherein two half-shell-shaped insulating parts are arranged between the vacuum envelope and the electron beam collector and are held there by a press fit. Two longitudinal slots separate the insulating parts.
  • the catcher is properly fixed in the cooling housing if the bore in the cooling housing is approx. 3% smaller than the outer diameter of the cylinder liner and the inner diameter of the cylinder by about 2% before assembly at room temperature. o it is larger than the outside diameter of the catcher.
  • a simple implementation of the method is ensured by keeping the cylinder at room temperature and by heating the housing to at least about 300 ° C.
  • Fig. 1 shows an electron beam receiver with a cylinder pushed on.
  • Fig. 2 shows the same unit with shrink-fitted cooling housing in a partially sectioned view.
  • An electron beam collector 1 is attached to a traveling wave tube 2.
  • a cylinder 3 is pushed onto the catcher 1.
  • the bore 6 in the cylinder 3 has a jump in diameter and thus forms a stop 4 against which the electron beam collector 1 rests. This arrangement is kept at a low temperature, preferably room temperature.
  • a cooling housing 5 with a bore 7 in the heated state is pushed onto the cylinder 3 in the direction of the arrow. After being pushed on, the temperatures of parts 1 to 5 equalize, a press fit of the required quality is created.
  • boron nitride which fills all the roughness in the bore 7 of the cooling housing 5 or in the surface 8 of the electron beam collector 1 and therefore ensures a particularly low heat transfer resistance between parts 1, 3 and 5.
  • the boron nitride is a high-quality insulator. In the axial direction, flashovers are avoided in that the axial extension of the cylinder is larger by appropriate insulation distances than the axial extension of the electron beam receiver.
  • the outer diameter of the cylinder is advantageously between about 10mm and 20mm, e.g. at 15mm in connection with an inner diameter of the cylinder of about 12mm.

Landscapes

  • Ceramic Products (AREA)
  • Microwave Tubes (AREA)
  • Particle Accelerators (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (7)

  1. Tube à modulation de vitesse (2), notamment tube à ondes progressives dont le capteur d'électrons (1) est entouré d'un élément (3) présentant une bonne capacité de conduction thermique et d'isolation électrique, ledit élément étant introduit dans l'alésage (7) d'un boîtier de refroidissement (5) et maintenu dans ce dernier par un moyen de serrage de manière à assurer leur liaison solidaire et une parfaite conduction thermique,
    caractérisé en ce que ledit élément est un cylindre creux pouvant être comprimé dans le sens radial, fabriqué notamment en nitrure de bore, en ce que ledit cylindre creux est comprimé par la face intérieure de l'alésage (7) et serré contre le capteur d'électrons (1) et en ce que la liaison solidaire entre le boîtier, le cylindre creux et le capteur d'électrons est assurée.
  2. Tube à modulation de vitesse selon la revendication 1, caractérisé en ce que le cylindre creux est fabriqué en un matériau isolant de faible porosité.
  3. Tube à modulation de vitesse selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le cylindre creux est fabriqué en un matériau de faible dureté.
  4. Tube à modulation de vitesse selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le cylindre creux est fabriqué en un matériau assurant la stabilité de sa forme à une température de 300 °C environ.
  5. Procédé de fabrication d'un tube à modulation de vitesse selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le diamètre intérieur du cylindre creux (3) est légèrement supérieur au diamètre extérieur du capteur d'électrons (1), en ce que le diamètre de l'alésage (7) du boîtier de refroidissement (5) est inférieur au diamètre extérieur du cylindre creux (3), en ce que le cylindre creux est glissé sur le capteur d'électrons (1) et maintenu à une première température, en ce que le boîtier de refroidissement est amené à une température supérieure à la première température, en ce que le diamètre de l'alésage (7) est supérieur au diamètre extérieur du cylindre creux (5) et en ce que le capteur d'électrons (1) est introduit, avec le cylindre creux, dans l'alésage du boîtier de refroidissement dont la température est plus élevée.
  6. Procédé selon la revendication 5, caractérisé en ce que le cylindre creux utilisé est fabriqué en nitrure de bore, en ce qu'à température ambiante, le diamètre de l'alésage est d'environ 3 %o inférieur au diamètre extérieur du cylindre creux et en ce que le diamètre intérieur de ce dernier est dimensionné de manière à être d'environ 2 %o supérieur au diamètre extérieur du capteur d'électrons.
  7. Procédé selon l'une quelconque des revendications 5 ou 6, caractérisé en ce que le cylindre creux est maintenu à la température ambiante et que le boîtier est échauffé à au moins 300 °C environ.
EP89114853A 1988-09-30 1989-08-10 Tube à onde progressive Expired - Lifetime EP0361047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3833312 1988-09-30
DE3833312 1988-09-30

Publications (3)

Publication Number Publication Date
EP0361047A2 EP0361047A2 (fr) 1990-04-04
EP0361047A3 EP0361047A3 (fr) 1991-04-10
EP0361047B1 true EP0361047B1 (fr) 1995-11-22

Family

ID=6364113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114853A Expired - Lifetime EP0361047B1 (fr) 1988-09-30 1989-08-10 Tube à onde progressive

Country Status (3)

Country Link
US (1) US5107166A (fr)
EP (1) EP0361047B1 (fr)
DE (1) DE58909506D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683091A1 (fr) * 1991-10-25 1993-04-30 Thomson Tubes Electroniques Dispositif de refroidissement ameliore pour tube hyperfrequence.
EP0577211B1 (fr) * 1992-07-03 1997-09-03 Koninklijke Philips Electronics N.V. Lampe à décharge à basse pression sans électrodes
CN112578426B (zh) * 2020-11-26 2022-09-20 中国工程物理研究院应用电子学研究所 一种可调节型阵列式法拉第筒

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1491509B1 (de) * 1961-10-30 1971-08-26 Varian Associates Elektronenstrahlerzeuger fuer eine hoechstleistungslaufzeit roehre
US3586100A (en) * 1968-09-28 1971-06-22 Nippon Electric Co Heat dissipating devices for the collectors of electron-beam tube
FR2038785A5 (fr) * 1969-03-28 1971-01-08 Thomson Csf
US3748513A (en) * 1969-06-16 1973-07-24 Varian Associates High frequency beam tube having an r.f. shielded and insulated collector
US3626230A (en) * 1969-10-02 1971-12-07 Varian Associates Thermally conductive electrical insulator for electron beam collectors
DE2213185A1 (de) * 1972-03-17 1973-09-27 Siemens Ag Justierbare laufzeitroehre
FR2219518B1 (fr) * 1973-02-23 1976-11-05 Thomson Csf
DE2333441C3 (de) * 1973-06-30 1975-12-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Lauffeldröhre
JPS5838904B2 (ja) * 1974-04-20 1983-08-26 日本電気株式会社 マイクロハカン
DE2449506C2 (de) * 1974-10-17 1976-09-23 Siemens Ag Elektronenstrahlauffaenger fuer laufzeitroehren, insbesondere wanderfeldroehren mittlerer leistung und verfahren zu seiner herstellung
JPS58186138A (ja) * 1982-04-26 1983-10-31 Toshiba Corp クライストロン装置
US4840595A (en) * 1986-08-29 1989-06-20 Siemens Aktiengesellschaft Electron beam catcher for velocity modulated electron tubes
EP0258667A1 (fr) * 1986-08-29 1988-03-09 Siemens Aktiengesellschaft Collecteur de faisceau électronique pour un tube à temps de transit

Also Published As

Publication number Publication date
EP0361047A2 (fr) 1990-04-04
EP0361047A3 (fr) 1991-04-10
DE58909506D1 (de) 1996-01-04
US5107166A (en) 1992-04-21

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