JPS61138430A - Electron gun for gyrotron - Google Patents

Electron gun for gyrotron

Info

Publication number
JPS61138430A
JPS61138430A JP25920784A JP25920784A JPS61138430A JP S61138430 A JPS61138430 A JP S61138430A JP 25920784 A JP25920784 A JP 25920784A JP 25920784 A JP25920784 A JP 25920784A JP S61138430 A JPS61138430 A JP S61138430A
Authority
JP
Japan
Prior art keywords
electron gun
cathode
heater
control electrode
vacuum
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.)
Pending
Application number
JP25920784A
Other languages
Japanese (ja)
Inventor
Kenichi Hayashi
健一 林
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP25920784A priority Critical patent/JPS61138430A/en
Publication of JPS61138430A publication Critical patent/JPS61138430A/en
Pending legal-status Critical Current

Links

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
    • H01J23/075—Magnetron injection guns

Landscapes

  • Microwave Tubes (AREA)

Abstract

PURPOSE:To securer a stable operation of an electron gun over a long time by providing a vacuum vessel with an exhaust pump communicating with a vacuum pump to keep the vacuum within the electron gun sufficiently high. CONSTITUTION:In an electron gun, a cathode 1 supported by a cathode support 3, a heater 5 supported by a heater support 6, and a control electrode 4, all assembled on an airtight bushing 13 constituted by coaxial conductors 14, an insulator 15, and a flange 16, are contained in an airtight vacuum vessel 12 with the same potential as an anode 7. The cathode, heater, and control electrode are supplied with a given voltage and current from the coaxial conductors 14a, 14b, and 14c. Since the cathode, heater, and control electrode to which a high voltage is applied are enclosed in the vessel 12 and thin has the same potential as the anode 7, it is able to provide the vessel 12 with an exhaust port 17 having a high conductance. This enables the electron gun to keep sufficiently high vacuum and a stable operation over a long time.

Description

【発明の詳細な説明】 〔発明の属する技術分野〕 本発明は、ジャイロトロン発振管などのジャイロトロン
用電子銃に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an electron gun for a gyrotron such as a gyrotron oscillation tube.

〔従来技術とその問題点〕[Prior art and its problems]

従来のジャイロトロン用電子銃の構成を第２図に示す。 The configuration of a conventional electron gun for a gyrotron is shown in FIG.

陰極（１）は電子放出環帯（２）を有し、陰極支持柱（
３）に支えられ、同軸状の制御電極（４）と中窒同筒状
陽極（７）と磁場発生器（９）で囲まれている。また、
陰極（１）の内側には、陰極を加熱するためのヒータ（
５）がヒータ支持柱（６）で支えられて設置されている
。各電極間には気密絶縁スペーサ（８）が配置され、そ
の内部は真壁に保持される。制御電極（４）は陽極（７
）に対して負の電位が印加され、陰極（１）には制御電
極（４）よシ更に負の電位が陰極支持（３）を通して印
加される。ヒータ（５）には、陰極支持柱（３）とヒー
タ支持柱（６）から陰極（１）を所望の温度に加熱する
に必要な電力が供給される。この構成による電子銃の一
つの電子軌道を（１１）に示す、ｉ！子は電子放出環帯
から発し、制御電極へ接近した後、磁場発生器による磁
場よシ旋回しながら陽極方向に加速される軌道を辿る。The cathode (1) has an electron emitting ring (2) and a cathode support pillar (
3), and is surrounded by a coaxial control electrode (4), a cylindrical anode (7), and a magnetic field generator (9). Also,
Inside the cathode (1), there is a heater (
5) is installed and supported by a heater support column (6). An airtight insulating spacer (8) is arranged between each electrode, and the inside thereof is kept solid. The control electrode (4) is an anode (7
), and a negative potential is applied to the cathode (1) as well as the control electrode (4) through the cathode support (3). The heater (5) is supplied with the power necessary to heat the cathode (1) to a desired temperature from the cathode support column (3) and the heater support column (6). One electron trajectory of the electron gun with this configuration is shown in (11), i! The electrons are emitted from the electron emission ring, and after approaching the control electrode, they follow a trajectory in which they are accelerated toward the anode while rotating due to the magnetic field generated by the magnetic field generator.

この時、電子ビームは電子銃内の残留ガスと衝突し二次
イオンを発生する。発生した二次イオンは電子と逆方向
に加速され陰極に衝突し、電子放出環帯の劣化を招く。At this time, the electron beam collides with the residual gas in the electron gun to generate secondary ions. The generated secondary ions are accelerated in the opposite direction to the electrons and collide with the cathode, causing deterioration of the electron emission ring.

したがって、この電子銃を長時間にわたって安定に動作
させるためには、電子銃内の真空度を十分に高く保つ必
要がある。残留ガスは陽極（７）に設けられた排気管（
１０）によって排気されるが、幾何学的制約から排気管
のコンダクタンスを大きくすることができず、電子銃内
の真空度を十分に高く保つことが困難であった。Therefore, in order to operate this electron gun stably over a long period of time, it is necessary to maintain a sufficiently high degree of vacuum within the electron gun. The residual gas is removed from the exhaust pipe (
10), but due to geometrical constraints, it was not possible to increase the conductance of the exhaust pipe, and it was difficult to maintain a sufficiently high degree of vacuum within the electron gun.

〔発明の目的〕[Purpose of the invention]

この発明は、上述した欠点を改良するもので、電子銃内
の真空度を十分に高く保つことのできる構造のジャイロ
トロン用電子銃を提供することを目的とする。The present invention is intended to improve the above-mentioned drawbacks, and aims to provide an electron gun for a gyrotron having a structure that can maintain a sufficiently high degree of vacuum within the electron gun.

〔発明の概要〕[Summary of the invention]

本発明は、従来の電子銃における陰極とヒータと制御電
極を、各部に電圧電流を供給する導体と絶縁体の同軸状
構造のプッシングに支持し、陽極と同電位の真空容器内
に封入するとともに、この真空容器に排気ポートを設け
ることによって、電子銃内の真空度を十分に高く保つこ
とのできる構造のジャイロトロン電子銃である。The present invention supports a cathode, a heater, and a control electrode in a conventional electron gun on a pusher with a coaxial structure of a conductor and an insulator that supplies voltage and current to each part, and encapsulates the cathode, heater, and control electrode in a vacuum container with the same potential as the anode. This gyrotron electron gun has a structure in which the degree of vacuum within the electron gun can be maintained at a sufficiently high level by providing an exhaust port in the vacuum chamber.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、十分にコンダクタンスの大きい排気ポ
ートを電子銃に設けることができるから。According to the present invention, an exhaust port with sufficiently large conductance can be provided in the electron gun.

電子銃内の真空度を高く保ち、以って、長時間にわたっ
て安定に動作可能なジャイロトロン用電子銃を構成でき
る。By maintaining a high degree of vacuum within the electron gun, it is possible to construct an electron gun for a gyrotron that can operate stably over a long period of time.

〔発明の実施例〕[Embodiments of the invention]

以下本発明の実施例を詳細に説明する。なお、従来装置
とその構成が同一の部分については同一符号を附けてそ
の説明を省略する。第１図は、本発明の電子銃の構成を
示す、陰極支持柱（３）とヒータ支持柱（６）でそれぞ
れ支えられた陰極（１）とヒータ（５）、及び、制御電
極（４）は、同軸状導体（１４）と絶縁体（１５）とフ
ランジ（１６）とで構成された気密のプッシング（１３
）上に組立てられ、陽極（７）と同電位（通常、接地電
位）の真空容器（１２）内に、気密に導入される。また
、陰極とヒータと制御電極には、同軸状の導体（１４ａ
）、　（１４ｂ）　、　（１４ｃ）から。Examples of the present invention will be described in detail below. Note that the same reference numerals are given to the parts having the same configuration as those of the conventional device, and the explanation thereof will be omitted. FIG. 1 shows the configuration of the electron gun of the present invention, showing a cathode (1) and a heater (5) supported by a cathode support column (3) and a heater support column (6), respectively, and a control electrode (4). is an airtight pushing (13) composed of a coaxial conductor (14), an insulator (15) and a flange (16).
) and introduced airtightly into a vacuum container (12) at the same potential as the anode (7) (usually at ground potential). In addition, a coaxial conductor (14a
), (14b), (14c).

それぞれ所望の電圧電流が供給される。この構成の電子
銃では、陰極、ヒータ、制御電極の高電圧印加部が真空
容器（１２）に封入され、真空容器（１２）は陽極（７
）と同電位となるので、真空容器（１２）に自由にコン
ダクタンスの大きい排気ポート（１７）ｔｌ−設置する
ことが可能となる。したがって、電子銃内の真空度を十
分に高く保つことができ、長時間にわたって安定に動作
可能な電子銃が構成できる。The respective desired voltage and current are supplied. In the electron gun with this configuration, the cathode, heater, and high voltage application part of the control electrode are enclosed in a vacuum container (12), and the vacuum container (12) is enclosed in the anode (7).
), it becomes possible to freely install an exhaust port (17) with a large conductance in the vacuum vessel (12). Therefore, the degree of vacuum within the electron gun can be maintained at a sufficiently high level, and an electron gun that can operate stably over a long period of time can be constructed.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明のジャイロトロン用電子銃を示す断面図
、第２図は従来のジャイロトロン用電子銃を示す断面図
である。 １・・・陰極、２・・・電子放出環帯、３・・・陰極支
持柱、４・・・制御電極、５・・・ヒータ、６・・・ヒ
ータ支持柱、７・・・陽極、８・・・絶縁スペーサ、９
・・・磁場発生器。 １０・・・排気管、１１・・・電子軌溝、１２・・・真
空容器、１３・・・プッシング、１４・・・同軸状導体
、１５・・・絶縁体。 １６・・・７ランジ。FIG. 1 is a sectional view showing an electron gun for a gyrotron according to the present invention, and FIG. 2 is a sectional view showing a conventional electron gun for a gyrotron. DESCRIPTION OF SYMBOLS 1... Cathode, 2... Electron emission ring, 3... Cathode support column, 4... Control electrode, 5... Heater, 6... Heater support column, 7... Anode, 8... Insulating spacer, 9
...Magnetic field generator. DESCRIPTION OF SYMBOLS 10... Exhaust pipe, 11... Electronic track groove, 12... Vacuum container, 13... Pushing, 14... Coaxial conductor, 15... Insulator. 16...7 lunges.

Claims (2)

【特許請求の範囲】[Claims] （１）電子を放出する環帯を有する陰極と、この蔭極と
同軸状の制御電極と、前記陰極の周囲に設けた中空円筒
状の陽極と、前記陰極を加熱するためのヒータと、前記
電極の周囲に設けた環状巻線から成る磁場発生器から成
る電子銃において、前記陰極と前記ヒータと前記制御電
極を、前記陽極と同電位の真空容器内に封入し、該真空
容器に真空ポンプに通じる排気用ポートを設けたことを
特徴とするジャイロトロン用電子銃。(1) a cathode having an annular band for emitting electrons; a control electrode coaxial with the negative electrode; a hollow cylindrical anode provided around the cathode; a heater for heating the cathode; In an electron gun consisting of a magnetic field generator consisting of an annular winding provided around an electrode, the cathode, the heater, and the control electrode are enclosed in a vacuum container at the same potential as the anode, and a vacuum pump is installed in the vacuum container. An electron gun for a gyrotron characterized by having an exhaust port leading to the gyrotron. （２）陰極とヒータと制御電極を支持し、各部に電圧電
流を供給するプッシングを、導体と絶縁体の同軸状構造
としたことを特徴とする特許請求の範囲第１項記載のジ
ャイロトロン用電子銃。(2) A gyrotron according to claim 1, characterized in that the pusher that supports the cathode, heater, and control electrode and supplies voltage and current to each part has a coaxial structure of a conductor and an insulator. electron gun.
JP25920784A 1984-12-10 1984-12-10 Electron gun for gyrotron Pending JPS61138430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25920784A JPS61138430A (en) 1984-12-10 1984-12-10 Electron gun for gyrotron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25920784A JPS61138430A (en) 1984-12-10 1984-12-10 Electron gun for gyrotron

Publications (1)

Publication Number Publication Date
JPS61138430A true JPS61138430A (en) 1986-06-25

Family

ID=17330875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25920784A Pending JPS61138430A (en) 1984-12-10 1984-12-10 Electron gun for gyrotron

Country Status (1)

Country Link
JP (1) JPS61138430A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669771A1 (en) * 1990-11-27 1992-05-29 Thomson Tubes Electroniques IMPROVED CATHODE FOR MICROWAVE TUBES.
JPH04101342U (en) * 1991-02-20 1992-09-01 株式会社東芝 Gyrotron

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669771A1 (en) * 1990-11-27 1992-05-29 Thomson Tubes Electroniques IMPROVED CATHODE FOR MICROWAVE TUBES.
JPH04101342U (en) * 1991-02-20 1992-09-01 株式会社東芝 Gyrotron

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