DE875972C - Cathode arrangement for generating two or more sharply focused electron beams which are directed in different directions - Google Patents

Cathode arrangement for generating two or more sharply focused electron beams which are directed in different directions

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Publication number
DE875972C
DE875972C DEL4137D DEL0004137D DE875972C DE 875972 C DE875972 C DE 875972C DE L4137 D DEL4137 D DE L4137D DE L0004137 D DEL0004137 D DE L0004137D DE 875972 C DE875972 C DE 875972C
Authority
DE
Germany
Prior art keywords
electron beams
cathode
directed
cathode arrangement
generating
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
DEL4137D
Other languages
German (de)
Inventor
Herbert Dr Doering
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Standard Elektrik Lorenz 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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Priority to DEL4137D priority Critical patent/DE875972C/en
Application granted granted Critical
Publication of DE875972C publication Critical patent/DE875972C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00Vacuum tubes
    • H01J21/02Tubes with a single discharge path
    • H01J21/18Tubes with a single discharge path having magnetic control means; having both magnetic and electrostatic control means

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Description

Bei manchen Elektronenröhren, beispielsweise im - Gegentaktröhren oder in speziellen Laufzeitröhren isst es nötig, mit scharf gebündelten Elektronenstrahlen zu ,arbeiten, in :denien, die -Elektronen nach entgegengesetzten Richtungen fliegen.With some electron tubes, for example push-pull tubes or in special time tubes it is necessary to eat with sharply focused electron beams to, work, in: denia, the -electrons fly in opposite directions.

Zur Erzeugung derartiger Elektronenstrahlen wird erfindungsgemäß vorgeschlagen, Kathoden mit doppeltrapezförmigem, doppeldreieckförmigem oder rechteckigem Querschnitt zu benutzen,. Zur Bündelung der Elektronenstrahlen werden ein Magnetfeld rund neben. den Kathoden angeordnete Blenden verwendet.To generate such electron beams, it is proposed according to the invention that Cathodes with a double trapezoidal, double triangular or rectangular cross-section to use,. To focus the electron beams, a magnetic field is placed around next to it. used diaphragms arranged on the cathodes.

Die neue Kathodenanordnung stellt eine Weiterbildung der bekannten Trapez- bzw... DreieckkatUode dar.The new cathode arrangement represents a further development of the known Trapezoidal or triangular cathode.

Die Fig;, r zeigt die beispielsweise Ausführung einer Düppeltrapezkathodederen sämtliche vier Flanken mit Emissionsmasse bedeckt sind. Die Kathode ist mit i bezeichnet, im Innern derselben befindet sich der Heizer 2. Neben der Kathode sind die Blenden 3 und 4. ungeordnet, die aus geknickten Blechen hergestellt sind. Die Elektronenstrahlen sind reit 5 bezeichnet, 6 sind die Anoden.. Unter Einwirkung eines Magnetfeldes von der Richtung A treten die Elektronen aus der Emissionsschicht aus, und zwar in der gezeichneten Weise unter Benutzung eines schräg gestellten elektrischen Feldes. Man, erhält mit :dieser Anordnung vier Elektronenstrahlen, von denen j e zwei nach einer Seite geirichtet sind. Analog erhält man aus der D!oppeZ-dreieckkathode nur zwei Elektronenstrahlen, -die je- doch, gegenüber einer Düppeltrapezkathode gleicher Steigung etwa doppelt so breit sind.. Eine solche Kathode ist in, Fig:2 dargestellt, die Bezugszahlen sind die gleichen wie in Fig. i. Bei der in Fig.3 dargestellten Kathodenausführung wird eine Kathodenhülse von rechtecki.gern Querschnitt benutzt, deren beide Seitenflächen zeit Emissionsmasse bedeckt sind,. Die Schrägstellung des elektrischen Feldes, die für den Elektronenaustritt in der dargestellten Weise maßgebend ist, erhält man durch Anordnung von vier Blenden an den Ecken der Kathode, 'und zwar parallel zu den .emittierenden Flächen.The Fig ;, r shows the example of the design of a chaff trapezoidal cathode, all four flanks of which are covered with emission material. The cathode is denoted by i and the heater 2 is located inside it. In addition to the cathode, the diaphragms 3 and 4, which are made from bent metal sheets, are disordered. The electron beams are indicated at 5, 6 are the anodes .. Under the action of a magnetic field from the direction A, the electrons emerge from the emission layer, in the manner shown using an oblique electric field. With this arrangement you get four electron beams, two of which are directed towards one side. Analogously, only two electron beams are obtained from the DoppeZ triangular cathode, but they are about twice as wide compared to a trapezoidal chaff with the same pitch. Such a cathode is shown in FIG. 2, the reference numbers are the same as in Fig. I. In the case of the cathode design shown in FIG. 3, a cathode sleeve with a rectangular cross-section is used, the two side surfaces of which are covered for the time the emission material. The inclination of the electric field, which is decisive for the escape of electrons in the manner shown, is obtained by arranging four diaphragms at the corners of the cathode, specifically parallel to the emitting surfaces.

Prinzipiell läßt sich auch eine Kathode mit rechteckigem Querschnitt bauen, die nur zwei Strahlen aussendet. Eine solche Kathode ist in Fig. 4. dar-;gestellt; sie ist aus der Anordnung nach Fig.3 durch Schrägstellen des gesamten Kathoden- und Blendensystems im Magnetfeld entstanden.. In diesem F,11 decken sich jedoch die beiden parallelen Strahlachsen nicht.In principle, a cathode with a rectangular cross section can also be used build that only emits two rays. Such a cathode is shown in FIG. it is from the arrangement according to Figure 3 by tilting the entire cathode and aperture system in the magnetic field. In this F, 11, however, coincide the two parallel beam axes do not.

Claims (3)

PATENTANSPRÜCHE: z. Kathodenanordnung zur Erzeugung mveier oder mehrerer scharf ,gebündelter Elektronenstrahlen, idie nach verschiedenen Seiten ;gerichtet sind, :dadurch gekennzeichnet, daß Kathoden mit doppeltrapezförmigem, doppeldreieckförmigem oder rechteckigem Querschnitt benutzt werden.. PATENT CLAIMS: e.g. Cathode arrangement for generating mveier or more sharp, focused electron beams, directed in different directions are: characterized in that cathodes with double trapezoidal, double triangular or rectangular cross-section. 2.: Kathodenanordnung nach Anspruch i, dadurch gekennzeichnet,- daß zur Bündelung der Elektronenstrahlen ein Magnetfeld und neben den Kathoden angeordnete Blenden dienen,. 2 .: cathode arrangement according to claim i, characterized in - that a magnetic field is used to focus the electron beams and diaphragms arranged next to the cathodes are used. 3. Kathodenanordnung nach Anspruch i und 2, dadurch gekennzeichnet, daß. das Kathoden- und Blendensys:tem schräg im Magnetfeld .angeordnet ist.3. Cathode arrangement according to claim i and 2, characterized in that. the cathode and diaphragm system at an angle in the Magnetic field. Is arranged.
DEL4137D 1943-01-24 1943-01-24 Cathode arrangement for generating two or more sharply focused electron beams which are directed in different directions Expired DE875972C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL4137D DE875972C (en) 1943-01-24 1943-01-24 Cathode arrangement for generating two or more sharply focused electron beams which are directed in different directions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL4137D DE875972C (en) 1943-01-24 1943-01-24 Cathode arrangement for generating two or more sharply focused electron beams which are directed in different directions

Publications (1)

Publication Number Publication Date
DE875972C true DE875972C (en) 1953-05-07

Family

ID=7256419

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL4137D Expired DE875972C (en) 1943-01-24 1943-01-24 Cathode arrangement for generating two or more sharply focused electron beams which are directed in different directions

Country Status (1)

Country Link
DE (1) DE875972C (en)

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