EP0505862B1 - Electron beam tube - Google Patents

Electron beam tube Download PDF

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Publication number
EP0505862B1
EP0505862B1 EP92104430A EP92104430A EP0505862B1 EP 0505862 B1 EP0505862 B1 EP 0505862B1 EP 92104430 A EP92104430 A EP 92104430A EP 92104430 A EP92104430 A EP 92104430A EP 0505862 B1 EP0505862 B1 EP 0505862B1
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EP
European Patent Office
Prior art keywords
electron beam
tube according
beam tube
collector
funnel
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
EP92104430A
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German (de)
French (fr)
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EP0505862A3 (en
EP0505862A2 (en
Inventor
Hubert Dipl.-Phys. Bradatsch
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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    • 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

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  • Microwave Tubes (AREA)

Description

Die vorliegende Erfindung betrifft eine Elektronenstrahlröhre nach dem Oberbegriff des Patentanspruches 1. Eine solche Röhre mit sich radial erstreckenden Kühlrippen ist beispielsweise aus der EP-A-3 76 827 bekannt.The present invention relates to an electron beam tube according to the preamble of claim 1. Such a tube with radially extending cooling fins is known for example from EP-A-3 76 827.

Die Aufgabe der vorliegenden Erfindung wird darin gesehen, die gerichtete Wärmeabgabe eines Elektronenkollektors einer solchen Elektronenstrahlröhre zu verbessern. Diese Aufgabe wird durch die im Kennzeichen des Patentanspruches 1 angegebenen Merkmale gelöst. Die abhängige Ansprüche beschreiben besondere Ausführungsarten der Erfindung.The object of the present invention is seen in improving the directional heat emission of an electron collector of such an electron beam tube. This object is achieved by the features specified in the characterizing part of patent claim 1. The dependent claims describe particular embodiments of the invention.

Die beschriebene trichterförmige, d.h. kegelstumpfmantelförmige Form der wärmeabstrahlenden Fortsätze bewirkt eine gerichtete Abstrahlung der Wärme überwiegend in Richtung des in den Elektronenkollektors einlaufenden Elektronenstrahls. Elektronenstrahlröhren für den Satelliteneinsatz wie z.B. Wanderfeldröhren, werden zweckmäßig so in einem Satelliten eingebaut, daß ihr Elektronenkollektor, der sich durch Aufnahme der hochbeschleunigten Elektronen erwärmt, aus der Außenwandung des Satelliten herausragt, so daß die Wärme in den Weltraum abgestrahlt wird. Die Wärmeabgabe wird dabei wesentlich verbessert, wenn die Abstrahlung möglichst von dem Satelliten hinweg gerichtet ist.The described funnel-shaped, ie truncated cone-shaped form of the heat-radiating extensions causes a directed radiation of the heat predominantly in the direction of the electron beam entering the electron collector. Electron beam tubes for satellite use, such as traveling wave tubes, are expediently installed in a satellite in such a way that their electron collector, which heats up due to the absorption of the highly accelerated electrons, protrudes from the outer wall of the satellite, so that the heat is radiated into space. The heat emission is significantly improved if the radiation is directed away from the satellite if possible.

Anhand des in der Figur dargestellten Ausführungsbeispiels wird die Erfindung nachfolgend näher erläutert.Based on the embodiment shown in the figure, the invention is explained in more detail below.

Die Figur zeigt einen auf einen Elektronenkollektor 8 einer Satelliten-Wanderfeldröhre aufgebrachten Kühlkörper 6 aus einem Metall, das einerseits möglichst leicht ist und andererseits eine möglichst gute Wärmeleitfähigkeit besitzt. Der Kühlkörper 6 weist zwei trichterförmige, d.h. kegelstumpfmantelförmige Fortsätze 1 und 2 auf, die sich in Richtung 5 des in den Kollektor 8 einlaufenden Elektronenstrahls erweitern und einen unterschiedlichen Öffnungswinkel α aufweisen. In Elektronenstrahlrichtung 5 werden die Öffnungswinkel α kleiner, d.h. der Kegelstumpfmantel 1 besitzt einen kleineren Öffnungswinkel α als der davorliegende Kegelstumpfmantel 2.The figure shows a heat sink 6 made of a metal, which is applied to an electron collector 8 of a satellite traveling wave tube and which on the one hand is as light as possible and on the other hand has the best possible thermal conductivity. The heat sink 6 has two funnel-shaped, i.e. truncated cone-shaped extensions 1 and 2, which expand in the direction 5 of the electron beam entering the collector 8 and have a different opening angle α. In the electron beam direction 5, the opening angles α become smaller, i.e. the truncated cone jacket 1 has a smaller opening angle α than the truncated cone jacket 2 in front of it.

Ein weiterer ringscheibenförmiger Kühlfortsatz 3 ist an dem, dem ankommenden Elektronenstrahl zugewandten Ende des Kühlkörpers 6 angeordnet. Dieser Kühlring 3 kann aber ebenso ein Kegelstumpfmantel sein mit einem Öffnungswinkel α, der größer ist als der des Kühlfortsatzes 2 aber zweckmäßig etwas kleiner ist als 90 Winkelgrade.Another annular disc-shaped cooling extension 3 is arranged on the end of the heat sink 6 which faces the incoming electron beam. However, this cooling ring 3 can also be a truncated cone jacket with an opening angle α which is larger than that of the cooling extension 2 but is expediently somewhat smaller than 90 degrees.

Die äußeren Umfänge der Fortsätze 1, 2 und 3 sind zweckmäßig so gewählt, daß die Einhüllende eine Schale, insbesondere annähernd eine Kugelschale bildet. Der Kollektor 8 mit dem Kühlträger 6 ist im wesentlichen rotationssymmetrisch zu der Röhrenlängsachse 4 ausgebildet. Die Kühlfortsätze 1, 2 und 3 können gegebenenfalls auch direkt an der Außenfläche des Kollektors 8 angeordnet oder befestigt sein.The outer circumferences of the extensions 1, 2 and 3 are expediently chosen so that the envelope forms a shell, in particular approximately a spherical shell. The collector 8 with the cooling carrier 6 is essentially rotationally symmetrical to the longitudinal axis 4 of the tube. The cooling extensions 1, 2 and 3 can optionally also be arranged or fastened directly on the outer surface of the collector 8.

Im allgemeinen wird es aber zweckmäßig sein, wenn die Fortsätze 1, 2 und 3 Teil eines Kühlkörpers 6 sind, der gut wärmeleitend auf dem Kollektor 8 befestigt ist.In general, however, it will be expedient if the extensions 1, 2 and 3 are part of a heat sink 6, which is fastened to the collector 8 in a manner that conducts heat.

Alle Oberflächen der Fortsätze 1, 2 und 3 mit Ausnahme der, dem ankommenden Elektronenstrahl 5 zugewandten Oberfläche 7 des dem ankommenden Elektronenstrahl 5 am nächsten liegenden Fortsatzes 3, weisen eine hohe Wärmeemission (Er > 0,9) auf. Die dem ankommenden Elektronenstrahl 5 zugewandte Oberfläche 7 des Fortsatzes hingegen ist gering wärmeemittierend (Er < 0,05) ausgebildet. Diese Wärmeemissionseigenschaften werden zweckmäßig durch entsprechende Behandlung und/oder Beschichtung erreicht.All surfaces of the extensions 1, 2 and 3 with the exception of the surface 7 facing the incoming electron beam 5 of the extension 3 closest to the incoming electron beam 5 have a high heat emission (E r > 0.9). The surface 7 of the extension facing the incoming electron beam 5, on the other hand, is of low heat-emitting (E r <0.05). These heat emission properties are expediently achieved by appropriate treatment and / or coating.

Der Elektronenkollektor 8 besteht bevorzugt aus gut wärmeleitendem Kupfer bzw. einer Kupferlegierung. Der Kühlkörper 6 mit den Fortsätzen 1, 2 und 3 besteht aus gut wärmeleitendem Metall. Er soll möglichst geringes Gewicht aufweisen und kann z.B. aus Aluminium bzw. einer Lichtmetallegierung bestehen. Die Fortsätze 1, 2 und 3 können z.B. auch aus Kupfer mit geringem Querschnitt bestehen. In diesem Falle wird es zweckmäßig sein, zusätzliche Verstrebungen zur Erhöhung der mechanischen Stabilität der trichterförmigen Fortsätze 1, 2 und 3 vorzusehen.The electron collector 8 is preferably made of good heat-conducting copper or a copper alloy. The heat sink 6 with the extensions 1, 2 and 3 consists of good heat-conducting metal. It should be as light as possible and can e.g. consist of aluminum or a light metal alloy. The extensions 1, 2 and 3 can e.g. also consist of copper with a small cross-section. In this case, it will be useful to provide additional struts to increase the mechanical stability of the funnel-shaped extensions 1, 2 and 3.

Claims (12)

  1. Electron beam tube with an electron collector, the outer surface of which has at least one large-area projection for heat radiation, characterised thereby that the projection (1, 2) is constructed in funnel shape and to widen in electron beam direction (5) and is fastened by its smaller opening directly or undirectly to the collector (8).
  2. Electron beam tube according to claim 1, characterised thereby that at least two funnel-shaped projections (1, 2) are provided.
  3. Electron beam tube according to claim 1 or 2, characterised thereby that the funnel-shaped projections (1, 2) are part of a cooling body (6) fastened to the electron collector (8).
  4. Electron beam tube according to one of claims 1 to 3, characterised thereby that merely the surfaces (7), which face the arriving electron beam (5), of the first projection (3) in electron beam direction (5) are constructed to radiate heat poorly, whereagainst all other surfaces of the projection or projections (1, 2, 3) are constructed to radiate heat well.
  5. Electron beam tube according to one of claims 1 to 4, characterised thereby that the envelope of the outer circumferential surfaces of the projections (1, 2, 3) is a curved dish surface, in particular an approximately spherical dish surface.
  6. Electron beam tube according to one of claims 1 to 5, characterised by the construction as a travelling field tube with an electron collector for heat radiation into the environment.
  7. Electron beam tube according to one of claims 1 to 5, characterised thereby that several funnel-shaped projections (1, 2, 3), the generating angles (α) of which are different, are provided.
  8. Electron beam tube according to claim 7, characterised thereby that the generating angles (α) are smaller as seen in electron beam direction.
  9. Electron beam tube according to one of claims 3 to 8, characterised thereby that the cooling body (6) consists of aluminium or an aluminium alloy and is mounted in good thermally conductive manner or an electron collector (8), particular of copper or a copper alloy.
  10. Electron beam tube according to one of claims 1 to 9, characterised thereby that the funnel-shaped projections (1, 2, 3) are fastened directly on the surface of the collector (8) or are integrally connected therewith.
  11. Electron beam tube according to claim 10, characterised thereby that the funnel-shaped projections (1, 2, 3) consist of copper or a copper alloy.
  12. Electron beam tube according to claims 1 to 11, characterised thereby that the projections (1, 2, 3) are mechanically stiffened or supported by means of additional webs.
EP92104430A 1991-03-23 1992-03-14 Electron beam tube Expired - Lifetime EP0505862B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4109664 1991-03-23
DE4109664A DE4109664C2 (en) 1991-03-23 1991-03-23 Electron tube

Publications (3)

Publication Number Publication Date
EP0505862A2 EP0505862A2 (en) 1992-09-30
EP0505862A3 EP0505862A3 (en) 1992-12-23
EP0505862B1 true EP0505862B1 (en) 1994-12-28

Family

ID=6428095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92104430A Expired - Lifetime EP0505862B1 (en) 1991-03-23 1992-03-14 Electron beam tube

Country Status (4)

Country Link
US (1) US5260623A (en)
EP (1) EP0505862B1 (en)
JP (2) JP2885987B2 (en)
DE (2) DE4109664C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700888B1 (en) * 1993-01-26 1995-04-07 Matra Marconi Space France Traveling wave tube cooling device mounted in a satellite and geostationary satellite with application.
US5649310A (en) * 1994-06-15 1997-07-15 Space Systems/Loral, Inc. Signal translation and amplification system including a thermal radiation panel coupled thereto
JP2770804B2 (en) * 1995-10-06 1998-07-02 日本電気株式会社 Traveling wave tube collector
EP0831513B1 (en) * 1996-09-19 2002-12-04 Nec Corporation Emissive heat radiator
DE102007062150A1 (en) * 2007-09-14 2009-04-02 Thales Electron Devices Gmbh Device for dissipating heat loss and ion accelerator arrangement and traveling wave tube arrangement with a Wärmeleitanordnung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE193507C (en) * 1900-01-01
FR376827A (en) * 1907-04-17 1907-08-22 Schinenbaugesellschaft Nuernberg A.-G. Wind tunnel for steelworks
US2285662A (en) * 1940-09-19 1942-06-09 Westinghouse Electric & Mfg Co Tube cooling means
US3448313A (en) * 1966-10-10 1969-06-03 Varian Associates Efficient radiation cooled beam collector for linear beam devices
JPS5213873Y2 (en) * 1974-05-29 1977-03-29
DE3138883A1 (en) * 1981-09-30 1983-04-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Heat-radiating metallic component
JPS61214327A (en) * 1985-03-20 1986-09-24 Toshiba Corp Collector structure for microwave tube
FR2641414A1 (en) * 1988-12-30 1990-07-06 Thomson Tubes Electroniques ELECTRON BEAM TUBE COOLED PARTIALLY BY DIRECT RADIATION

Also Published As

Publication number Publication date
JP3246658B2 (en) 2002-01-15
DE4109664A1 (en) 1992-09-24
DE4109664C2 (en) 2000-06-08
EP0505862A3 (en) 1992-12-23
DE59201047D1 (en) 1995-02-09
US5260623A (en) 1993-11-09
JP2885987B2 (en) 1999-04-26
EP0505862A2 (en) 1992-09-30
JPH11219662A (en) 1999-08-10
JPH0582030A (en) 1993-04-02

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