FR3098010B1 - DEVICE FOR GENERATING ELECTROMAGNETIC RADIATION AND METHOD FOR PRODUCING SUCH A DEVICE - Google Patents

DEVICE FOR GENERATING ELECTROMAGNETIC RADIATION AND METHOD FOR PRODUCING SUCH A DEVICE Download PDF

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Publication number
FR3098010B1
FR3098010B1 FR1907009A FR1907009A FR3098010B1 FR 3098010 B1 FR3098010 B1 FR 3098010B1 FR 1907009 A FR1907009 A FR 1907009A FR 1907009 A FR1907009 A FR 1907009A FR 3098010 B1 FR3098010 B1 FR 3098010B1
Authority
FR
France
Prior art keywords
base electrode
cathode
tip
emitting
emitting tip
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.)
Active
Application number
FR1907009A
Other languages
French (fr)
Other versions
FR3098010A1 (en
Inventor
Pierre-Louis Gautherin
Jean-Paul Mazellier
Stéphane Xavier
Odile Bezencenet
Laurent Gangloff
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 SA
Original Assignee
Thales 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
Application filed by Thales SA filed Critical Thales SA
Priority to FR1907009A priority Critical patent/FR3098010B1/en
Publication of FR3098010A1 publication Critical patent/FR3098010A1/en
Application granted granted Critical
Publication of FR3098010B1 publication Critical patent/FR3098010B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • 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
    • 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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/26—Helical slow-wave structures; Adjustment therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/06—Cathodes
    • H01J35/066—Details of electron optical components, e.g. cathode cups

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Cold Cathode And The Manufacture (AREA)

Abstract

Les modes de réalisation de l’invention fournissent un dispositif de génération de rayonnements électromagnétiques (100) comprenant une enceinte sous vide soumise à un champ électromagnétique, au moins une source de haute tension configurée pour générer le champ électromagnétique, une cathode (106) configurée pour diffuser un flux d’électrons par émission à effet de champ dans l’enceinte sous vide et une anode configurée pour recevoir ledit flux d’électrons. Avantageusement, la cathode (106) comprend : Au moins une électrode de base (204) portée à un premier potentiel électrique, Au moins une pointe émettrice d’électrons par émission à effet de champ (206) disposée sur l’électrode de base (204), et s’étendant vers l’anode dans une direction sensiblement perpendiculaire à ladite électrode de base (204), la pointe émettrice comprenant une partie inférieure (2060) en contact avec l’électrode de base et une partie supérieure (2061) comprenant le sommet de la pointe émettrice (206), Une électrode de modulation (203) électriquement isolée de l’électrode de base (204), placée dans un plan sensiblement perpendiculaire à la pointe émettrice (206), et portée à un deuxième potentiel électrique, Une couche diélectrique (205) recouvrant au moins une partie de la cathode (106), la partie de la cathode (106) recouverte par la couche diélectrique (205) comprenant au moins la partie inférieure de la pointe émettrice (2060), la partie supérieure de la pointe émettrice étant soumise à un champ électromagnétique local ayant une intensité modulée à partir de la différence entre le premier potentiel électrique et le deuxième potentiel électrique. Figure pour l’abrégé : Fig 3The embodiments of the invention provide a device for generating electromagnetic radiation (100) comprising a vacuum enclosure subjected to an electromagnetic field, at least one high voltage source configured to generate the electromagnetic field, a cathode (106) configured to diffuse a flow of electrons by field effect emission in the vacuum enclosure and an anode configured to receive said flow of electrons. Advantageously, the cathode (106) comprises: At least one base electrode (204) brought to a first electric potential, At least one tip emitting electrons by field effect emission (206) arranged on the base electrode ( 204), and extending towards the anode in a direction substantially perpendicular to said base electrode (204), the emitting tip comprising a lower part (2060) in contact with the base electrode and an upper part (2061) comprising the top of the emitting tip (206), A modulation electrode (203) electrically isolated from the base electrode (204), placed in a plane substantially perpendicular to the emitting tip (206), and brought to a second potential electrical, A dielectric layer (205) covering at least part of the cathode (106), the part of the cathode (106) covered by the dielectric layer (205) comprising at least the lower part of the emitting tip (2060), the upper part of the emitting tip being subjected to a local electromagnetic field having an intensity modulated from the difference between the first electric potential and the second electric potential. Figure for the abstract: Fig 3

FR1907009A 2019-06-27 2019-06-27 DEVICE FOR GENERATING ELECTROMAGNETIC RADIATION AND METHOD FOR PRODUCING SUCH A DEVICE Active FR3098010B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1907009A FR3098010B1 (en) 2019-06-27 2019-06-27 DEVICE FOR GENERATING ELECTROMAGNETIC RADIATION AND METHOD FOR PRODUCING SUCH A DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1907009A FR3098010B1 (en) 2019-06-27 2019-06-27 DEVICE FOR GENERATING ELECTROMAGNETIC RADIATION AND METHOD FOR PRODUCING SUCH A DEVICE
FR1907009 2019-06-27

Publications (2)

Publication Number Publication Date
FR3098010A1 FR3098010A1 (en) 2021-01-01
FR3098010B1 true FR3098010B1 (en) 2024-03-15

Family

ID=69157909

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1907009A Active FR3098010B1 (en) 2019-06-27 2019-06-27 DEVICE FOR GENERATING ELECTROMAGNETIC RADIATION AND METHOD FOR PRODUCING SUCH A DEVICE

Country Status (1)

Country Link
FR (1) FR3098010B1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7326328B2 (en) * 2005-07-19 2008-02-05 General Electric Company Gated nanorod field emitter structures and associated methods of fabrication

Also Published As

Publication number Publication date
FR3098010A1 (en) 2021-01-01

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