JPH04277454A - Electron gun - Google Patents
Electron gunInfo
- Publication number
- JPH04277454A JPH04277454A JP3039850A JP3985091A JPH04277454A JP H04277454 A JPH04277454 A JP H04277454A JP 3039850 A JP3039850 A JP 3039850A JP 3985091 A JP3985091 A JP 3985091A JP H04277454 A JPH04277454 A JP H04277454A
- Authority
- JP
- Japan
- Prior art keywords
- electron gun
- cylinder
- end flange
- cathode
- anode
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 15
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 8
- 230000005684 electric field Effects 0.000 description 4
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Landscapes
- Particle Accelerators (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
Description
［発明の目的］ [Purpose of the invention]
【０００１】0001
【産業上の利用分野】本発明は、加速器や核融合装置に
用いられる電子銃に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron gun used in an accelerator or a nuclear fusion device.
【０００２】0002
【従来の技術】電子銃は、陰極から熱電子を放出させ、
それを加速して方向性を持たせるものであり、目的や用
途に応じて、各種の電子銃が考案されている。ここでは
、円柱ビームを陰極から平行に取り出す、比較的電流値
が多く、陽極電圧の高い用途に用いられる形式に関する
ものである。以下、その構造について図３から図５にて
説明する。[Prior Art] An electron gun emits thermionic electrons from a cathode.
It accelerates it and gives it directionality, and various types of electron guns have been devised depending on the purpose and application. Here, we are concerned with a type used in applications where a cylindrical beam is taken out in parallel from the cathode, and where the current value is relatively large and the anode voltage is high. The structure will be explained below with reference to FIGS. 3 to 5.
【０００３】熱電子を放出する陰極（１）を中心に、そ
の周囲を囲むウエネルト電極（２）及び加速電圧を掛け
る陽極（３）とからなり、陰極（１）及びウエネルト電
極（２）は、カソードサポート（４）を介して端部フラ
ンジ（５）に取付けられている。陰極加熱用の電流リー
ド（６）も端部フランジ（５）に電気的に絶縁されて取
付けられている。一方、陽極（３）は、陰極（１）と同
心上に配置され、電気的に絶縁する為の絶縁円筒（７）
を介して、端部フランジ（５）に取付けられている。It consists of a cathode (1) that emits thermoelectrons, a Wehnelt electrode (2) surrounding it, and an anode (3) that applies an accelerating voltage.The cathode (1) and Wehnelt electrode (2) are It is attached to the end flange (5) via the cathode support (4). A current lead (6) for cathode heating is also mounted in an electrically insulated manner on the end flange (5). On the other hand, the anode (3) is arranged concentrically with the cathode (1) and has an insulating cylinder (7) for electrical insulation.
via the end flange (5).
【０００４】この陰極（１）及びウエネルト電極（２）
を内側に納める陽極（３）、端部フランジ（５）及び絶
縁円筒（７）の内側は真空であり、外側は絶縁強度の大
きい気体絶縁材料であるＳＦ６ ガスを封入した容器内
に納められている。[0004] This cathode (1) and Wehnelt electrode (2)
The inside of the anode (3), end flange (5), and insulating cylinder (7) that house the inside is a vacuum, and the outside is housed in a container filled with SF6 gas, which is a gas insulating material with high insulation strength. There is.
【０００５】この為、絶縁円筒（７）には、セラミック
円筒（７ａ）が用いられ、両端を封着金属（７ｂ）にて
、陽極（３）及び端部フランジ（５）に溶接して取付け
られている。従って、陰極（１）と陽極（３）とに掛け
る電位差に対し、沿面放電、コロナ放電の起きない所要
距離と形状にしなければならない。For this reason, a ceramic cylinder (7a) is used as the insulating cylinder (7), and both ends are welded to the anode (3) and the end flange (5) with sealing metal (7b). It is being Therefore, the required distance and shape must be such that creeping discharge and corona discharge do not occur with respect to the potential difference applied to the cathode (1) and anode (3).
【０００６】特に、コロナ放電に対し、絶縁円筒（７）
両端の封着金属（７ｂ）部の電界集中を和らげる為、コ
ロナ放電防止リング（８ａ），（８ｂ）を両端の封着部
（７ｃ）を覆うように内、外周に取付けている。Especially against corona discharge, the insulating cylinder (7)
In order to relieve the electric field concentration at the sealing metal parts (7b) at both ends, corona discharge prevention rings (8a) and (8b) are attached to the inner and outer peripheries so as to cover the sealing parts (7c) at both ends.
【０００７】このコロナ放電防止リング（８ａ），（８
ｂ）は、図４及び図５に示すように、円筒状のものを２
分割及び３分割したものを、陽極（３）及び端部フラン
ジ（５）にビス止めにて取付けている。この様な構造に
於いて、このコロナ放電防止リング（８ａ），（８ｂ）
は、加工性、組立作業性が悪く、構造上部品数を多くし
複雑化していた。This corona discharge prevention ring (8a), (8
b) As shown in Figures 4 and 5, cylindrical objects are
The parts divided into three parts are attached to the anode (3) and the end flange (5) with screws. In such a structure, these corona discharge prevention rings (8a), (8b)
The processability and assembly workability were poor, and the structure required a large number of parts and was complicated.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、このような
電子銃に於いて、電子銃構造の簡素化を計り、組立性を
良くすることを目的とする。
［発明の構成］SUMMARY OF THE INVENTION It is an object of the present invention to simplify the structure of such an electron gun and improve its ease of assembly. [Structure of the invention]
【０００９】[0009]
【課題を解決するための手段】本発明は、絶縁円筒の両
端の内、外周に取付けていたコロナ放電防止リングを封
着金属にて形成する。[Means for Solving the Problems] According to the present invention, corona discharge prevention rings attached to the inner and outer peripheries of both ends of an insulating cylinder are formed of a sealing metal.
【００１０】0010
【作用】絶縁円筒の両端に取付けられる封着金属の外周
側及び内周側を封着部を覆いかくすようにリング円筒状
にすることにより、コロナ放電防止リングと同じように
電界集中を和らげる機能をもたせることが出来る。[Function] By forming the outer and inner circumferential sides of the sealing metal attached to both ends of the insulating cylinder into a ring-cylindrical shape so as to cover and hide the sealing part, it functions to relieve electric field concentration in the same way as a corona discharge prevention ring. It is possible to have
【００１１】[0011]
【実施例】以下、本発明の実施例を図１及び図２を参照
して説明する。本実施例に於いては、絶縁円筒部を除い
て、その他の構造は変わらないので説明は省略する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. In this embodiment, the other structures are the same except for the insulating cylindrical portion, so the explanation will be omitted.
【００１２】絶縁円筒（９）は、セラミック円筒（７ａ
）と封着金属（７ｂ）から成り立っており、封着金属は
、セラミック円筒（９ａ）との封着部（９ｃ）を覆いか
くすように、セラミック円筒（９ａ）の外周側及び内周
側にて先端がリング円筒状になるように、図２の如く成
形する。The insulating cylinder (9) is a ceramic cylinder (7a
) and a sealing metal (7b), and the sealing metal is attached to the outer and inner circumferential sides of the ceramic cylinder (9a) so as to cover and hide the sealing part (9c) with the ceramic cylinder (9a). The tip is shaped into a ring-cylindrical shape as shown in Figure 2.
【００１３】この封着金属（９ｂ）とセラミック円筒（
９ａ）を封着して一体化し、絶縁円筒（９）を形成する
。この絶縁円筒（９）を陽極（３）及び端部フランジ（
５）と封着金属（９ｂ）の外周端部にて溶接して電子銃
を形成する。次に、本実施例の作用について説明する。This sealing metal (9b) and the ceramic cylinder (
9a) are sealed and integrated to form an insulating cylinder (9). This insulating cylinder (9) is connected to the anode (3) and the end flange (
5) and the outer peripheral end of the sealing metal (9b) are welded to form an electron gun. Next, the operation of this embodiment will be explained.
【００１４】絶縁円筒（９）の両端に取付けた封着金属
（９ｂ）がリング円筒状の形状にて、封着部（９ｃ）の
内、外周を覆いかくすことにより、電界集中を和らげる
ことが出来る。The sealing metal (9b) attached to both ends of the insulating cylinder (9) has a ring-cylindrical shape and covers and hides the inner and outer periphery of the sealing part (9c), thereby alleviating electric field concentration. I can do it.
【００１５】[0015]
【発明の効果】以上説明したように、本発明は、絶縁円
筒の両端の封着金属をセラミック円筒の外周側及び内周
側にて、封着部を覆いかくす様に、リング円筒状に形成
することにより、封着部に於ける電界集中を和らげるこ
とが出来る。これにより、従来、この部分に取付けてい
たコロナ放電防止リングを取付ける必要はなくなり、構
造の簡素化が計れ、組立性も良くなる。As explained above, the present invention provides a ring-cylindrical shape in which the sealing metal at both ends of the insulating cylinder is formed on the outer and inner circumferential sides of the ceramic cylinder so as to cover and hide the sealing portion. By doing so, electric field concentration in the sealed portion can be alleviated. This eliminates the need to attach the corona discharge prevention ring that was conventionally attached to this part, simplifying the structure and improving ease of assembly.
【図１】本発明の電子銃の一実施例の縦断面図FIG. 1 is a vertical cross-sectional view of an embodiment of an electron gun of the present invention.
【図２】
本実施例の封着金属の斜視図[Figure 2]
A perspective view of the sealing metal of this example
【図３】従来の電子銃の縦断面図[Figure 3] Longitudinal cross-sectional view of a conventional electron gun
【図４】従来のコロナ放電防止リングの斜視図[Figure 4] Perspective view of a conventional corona discharge prevention ring
【図５】
従来のコロナ放電防止リング[Figure 5]
Conventional corona discharge prevention ring
１…陰極 ２…ウエネ
ルト電極 ３…陽極
４…カソードサポート ５…端部フランジ
６…電流リード
７…従来の絶縁円筒
７ａ…従来のセラミック円筒
７ｂ…従来の封着金属
７ｃ…従来の封着部
８ａ，８ｂ…従来のコロナ放電防止リング ９…
本実施例の絶縁円筒
９ａ…本実施例のセラミック円筒
９ｂ…本実施例の封着金属
９ｃ…本実施例の封着部1... Cathode 2... Wehnelt electrode 3... Anode 4... Cathode support 5... End flange
6...Current lead 7...Conventional insulating cylinder
7a... Conventional ceramic cylinder 7b... Conventional sealing metal
7c...Conventional sealing parts 8a, 8b...Conventional corona discharge prevention ring 9...
Insulating cylinder 9a of this embodiment...Ceramic cylinder of this embodiment
9b...Sealing metal of this example 9c...Sealing part of this example
Claims (1)
ポートを介して端部フランジに取付け、また陽極を同心
円状に絶縁円筒を介して端部フランジに取付けた電子銃
に於いて、この絶縁円筒の両端部の封着金属部を封着面
を覆いかくすように絶縁円筒の内、外周にリング円筒状
になるように成形したことを特徴とする電子銃。Claim 1: In an electron gun in which a cathode and a Wehnelt electrode are attached to an end flange via a cathode support, and an anode is attached concentrically to the end flange via an insulating cylinder, both ends of the insulating cylinder are provided. An electron gun characterized in that a sealing metal part is formed into a ring-cylindrical shape on the inner and outer periphery of an insulating cylinder so as to cover and hide a sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3039850A JPH04277454A (en) | 1991-03-06 | 1991-03-06 | Electron gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3039850A JPH04277454A (en) | 1991-03-06 | 1991-03-06 | Electron gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04277454A true JPH04277454A (en) | 1992-10-02 |
Family
ID=12564443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3039850A Pending JPH04277454A (en) | 1991-03-06 | 1991-03-06 | Electron gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04277454A (en) |
-
1991
- 1991-03-06 JP JP3039850A patent/JPH04277454A/en active Pending
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