JPS6185754A - Electron gun for electron tube - Google Patents
Electron gun for electron tubeInfo
- Publication number
- JPS6185754A JPS6185754A JP20592184A JP20592184A JPS6185754A JP S6185754 A JPS6185754 A JP S6185754A JP 20592184 A JP20592184 A JP 20592184A JP 20592184 A JP20592184 A JP 20592184A JP S6185754 A JPS6185754 A JP S6185754A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- heater
- anode
- electron
- shortening
- 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.)
- Granted
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
- H01J23/065—Electron or ion guns producing a solid cylindrical beam
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、り２イストロン、進行波管等の電子管の電子
銃に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electron gun for an electron tube such as a RI2 istron or a traveling wave tube.
（従来の技術）
従来、り２イストロンや進行波管等の電子銃として広く
用いられている典型的な構造例が第３図に示されている
。ヒーター８によシカソード３を所定温度に加熱して陽
極１とカソード３０間に電位差を与え電子ビーム９を取
り出す。この電子ビーム９は収束電極（クエネルト電極
）２によって成形され細いビームとなって高周波回路（
図示していない→に入る。陽極ｌとカソード３の間は電
位差（これを以下ビーム電圧と記す）を与えるため絶縁
円筒４が設けられる。又ヒーター８に通電し加熱するた
めにヒーター電極７とヒーターカソード電極５０間に絶
縁部材６が設けられている。(Prior Art) FIG. 3 shows a typical structural example that has been widely used as an electron gun such as a R2 istron or a traveling wave tube. The cathode 3 is heated to a predetermined temperature by the heater 8, a potential difference is applied between the anode 1 and the cathode 30, and an electron beam 9 is extracted. This electron beam 9 is shaped by a converging electrode (Quenert electrode) 2 to become a narrow beam and is used in a high frequency circuit (
Enter → not shown. An insulating cylinder 4 is provided between the anode l and the cathode 3 to provide a potential difference (hereinafter referred to as beam voltage). Further, an insulating member 6 is provided between the heater electrode 7 and the heater cathode electrode 50 in order to energize the heater 8 and heat it.
電子ビームを取シ出す空間は真空に保持されなければな
らないため、絶縁円筒４．ヒータ−カソード電極５．絶
縁
空外囲器の一部を構成している。Since the space from which the electron beam is extracted must be kept in a vacuum, an insulating cylinder 4. Heater-cathode electrode5. It forms part of the insulating air envelope.
（発明が解決しようとする問題点）
ヒーター８で発生した熱はカソード３の温度維持に使わ
れるが、放射によシ散逸するものを除き大部分はクエネ
ルト電極２を伝わシ、ヒーターカソード電極５に達し、
この周辺で真空外囲器外に放出される。ヒーター８から
の熱伝達によｐクエネルト電極２の陽極１に近い方の端
はかなシ高い温度になる。このため真空放電が発生し、
電子管の動作を阻害したシ破壊したシすることがある。(Problem to be Solved by the Invention) The heat generated by the heater 8 is used to maintain the temperature of the cathode 3, but most of it, except for the heat dissipated by radiation, is transmitted through the Quesnelt electrode 2, and is transferred to the heater cathode electrode 5. reached,
Around this area, it is released outside the vacuum envelope. Due to the heat transfer from the heater 8, the end of the p-quesnelt electrode 2 closer to the anode 1 becomes at a very high temperature. This causes a vacuum discharge,
The electron tube may not function properly or be destroyed.
また近年、電子管の大電力化が進んでビーム電圧の晶い
電子銃が要求される様になシ、なかには１００ｋｖ ｔ
−越えるものも出てきている。この様な電子銃では絶縁
円筒４の長さは縁面放電を防止するため２ｏｃｔＩＬ位
にもなシ第３図〆に示した様な構造であると、電子銃の
内容積が大きくなって電子管製造工程中の排気工程の所
要時間が長くなるという問題がある。In addition, in recent years, electron tubes have become more powerful and electron guns with higher beam voltages are required.
-Some have surpassed it. In such an electron gun, the length of the insulating cylinder 4 is about 2 octIL to prevent edge discharge.If the structure is as shown in Fig. 3, the internal volume of the electron gun becomes large and the electron tube There is a problem in that the evacuation step during the manufacturing process takes a long time.
本発明の目的は、上述の欠点を除去し、電子銃の内容積
を小さくして製造時間の短ＪＩＩｔ−はかるとともに１
ウエネルト電也の温度を下げてウェネルト電極と陽極間
の耐電圧特性を向上させた電子管用電子銃を提供するこ
とである。The purpose of the present invention is to eliminate the above-mentioned drawbacks, reduce the internal volume of the electron gun, shorten the manufacturing time, and
An object of the present invention is to provide an electron gun for an electron tube in which the temperature of the Wehnelt electrode is lowered and the withstand voltage characteristics between the Wehnelt electrode and the anode are improved.
（問題点を消失するための手段）
本発明は、ヒーター電極、ヒーターカソード電極、陽極
、陰極およびウェネルト電極を有し、ヒーターカソード
電極と陽極間を真空外囲器を兼ねる絶縁円筒で絶縁した
電子銃において、ヒータ；極が、ヒーターカソード電極
と陽極との間の真空外ｖ５器ｔ″兼ねた絶縁円筒の内軸
に設けらｉていることを特徴とする。(Means for eliminating the problem) The present invention has a heater electrode, a heater cathode electrode, an anode, a cathode, and a Wehnelt electrode, and an insulating cylinder that serves as a vacuum envelope between the heater cathode electrode and the anode. The gun is characterized in that a heater pole is provided on the inner shaft of an insulating cylinder that also serves as a vacuum tube between the heater cathode electrode and the anode.
（実施例） 次に図面を参照して本発明を説明しよう。(Example) The invention will now be described with reference to the drawings.
第１図は本発明の第１の実施例を示す断面図で第３図に
示した従来例と異なるところは、ヒーター電極７が金属
円筒部材１２と金ＢＩＪング部材１３を用いて絶縁円筒
４の端部よシ内部へ入った位置に設けられており、ウェ
ネルト電極２が短かくされている点である。このような
構成により、ヒーター８かも放出され良熱によってウェ
ネルトｔｔａ２は加熱されるが、この熱はすみやかにヒ
ーターカソード電極５の方に伝達しそこから効果的に放
熱される。したがって、ウェネルト電極２の１Ｊｆｆｉ
１に近い部分の温度も低くなるので真空放電の発生を抑
えることができる。また電子銃の内容積も減らすことが
でき排気に要する時間も短縮できる。FIG. 1 is a sectional view showing a first embodiment of the present invention. The difference from the conventional example shown in FIG. The point is that the Wehnelt electrode 2 is shortened because it is provided at a position that is located inside the end of the electrode. With this configuration, the Wehnelt tta2 is heated by the heat emitted from the heater 8, but this heat is quickly transferred to the heater cathode electrode 5 and is effectively radiated from there. Therefore, 1Jffi of Wehnelt electrode 2
Since the temperature of the portion close to 1 is also lowered, the occurrence of vacuum discharge can be suppressed. Furthermore, the internal volume of the electron gun can be reduced, and the time required for evacuation can also be shortened.
第２図は本発明の第２の実施例で、陽極１が電子管本体
１０から絶縁されている場合を示している。この例にお
いてもヒーター電極７は金属リング部材１３および金属
円筒部材１２を介して絶縁円筒１１′の内部に深く入っ
た位置に設けられている。したがって、この場合もウェ
ネルト電極２の熱はヒーターカソード電極５や金属円筒
部材１２の方へすみやかに伝導し、そこから外部へ放熱
されるので上記第１の実施例と同様に真空放電を抑制で
きる。FIG. 2 shows a second embodiment of the present invention, in which the anode 1 is insulated from the electron tube body 10. In this example as well, the heater electrode 7 is provided deep inside the insulating cylinder 11' via the metal ring member 13 and the metal cylindrical member 12. Therefore, in this case as well, the heat of the Wehnelt electrode 2 is quickly conducted to the heater cathode electrode 5 and the metal cylindrical member 12, and is radiated from there to the outside, so that vacuum discharge can be suppressed as in the first embodiment. .
（発明の効果）
以上述べたように、本発明はヒーター電極が陽極とウニ
ネル）ｉｔｆｉ間を絶縁するとともに真空外囲器１成す
る絶縁円筒の内部に設けられているのでウェネルト電極
の放熱を効率よく行なうことができ、かつ電子銃の内容
積も小さくできて製造も容易になるなどの利点を有する
。(Effects of the Invention) As described above, in the present invention, the heater electrode is provided inside the insulating cylinder that insulates between the anode and the wehnelt electrode and constitutes the vacuum envelope, so that the heat dissipation of the Wehnelt electrode is efficiently carried out. It has the advantage that it can be easily used, the internal volume of the electron gun can be made small, and manufacturing is easy.
第１図は本発明の第１の実施例の断面図、第２図は本発
明の第２の実施例の断面図、第３図は従来の電子銃の典
型的構造の断面図である。
１・・・陽極、２・・・ウェネルト電極、３ カソード
、４・・・絶縁円筒、５ ヒーターカソード［ｆｉ、６
・・・絶縁部材、７・・・ヒーター電極、８・ ヒータ
ー、９・・・電子ビーム、１０・・・電子管本体、１１
．１１’・・・絶縁円筒。FIG. 1 is a sectional view of a first embodiment of the invention, FIG. 2 is a sectional view of a second embodiment of the invention, and FIG. 3 is a sectional view of a typical structure of a conventional electron gun. DESCRIPTION OF SYMBOLS 1... Anode, 2... Wehnelt electrode, 3 Cathode, 4... Insulated cylinder, 5 Heater cathode [fi, 6
... Insulating member, 7... Heater electrode, 8. Heater, 9... Electron beam, 10... Electron tube body, 11
．． 11'...Insulating cylinder.
Claims (1)
前記ヒーターカソード電極と陽極間を真空外囲器を兼ね
る絶縁円筒で絶縁した電子銃において、前記ヒーター電
極がヒーターカソード電極と陽極間の真空外囲器を兼ね
た絶縁円筒の内側に設けられていることを特徴とする電
子管用電子銃。It has a heater electrode, a heater cathode electrode, and an anode,
In the electron gun in which the heater cathode electrode and the anode are insulated by an insulating cylinder that also serves as a vacuum envelope, the heater electrode is provided inside the insulating cylinder that also serves as a vacuum envelope between the heater cathode electrode and the anode. An electron gun for an electron tube characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59205921A JPH081786B2 (en) | 1984-10-01 | 1984-10-01 | Electron gun for electron tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59205921A JPH081786B2 (en) | 1984-10-01 | 1984-10-01 | Electron gun for electron tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6185754A true JPS6185754A (en) | 1986-05-01 |
| JPH081786B2 JPH081786B2 (en) | 1996-01-10 |
Family
ID=16514945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59205921A Expired - Lifetime JPH081786B2 (en) | 1984-10-01 | 1984-10-01 | Electron gun for electron tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081786B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669771A1 (en) * | 1990-11-27 | 1992-05-29 | Thomson Tubes Electroniques | IMPROVED CATHODE FOR MICROWAVE TUBES. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5816291A (en) * | 1981-07-23 | 1983-01-29 | ヤマハ株式会社 | Music output unit |
| JPS5991631A (en) * | 1982-11-18 | 1984-05-26 | Nec Corp | Electron gun for microwave tube |
-
1984
- 1984-10-01 JP JP59205921A patent/JPH081786B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5816291A (en) * | 1981-07-23 | 1983-01-29 | ヤマハ株式会社 | Music output unit |
| JPS5991631A (en) * | 1982-11-18 | 1984-05-26 | Nec Corp | Electron gun for microwave tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669771A1 (en) * | 1990-11-27 | 1992-05-29 | Thomson Tubes Electroniques | IMPROVED CATHODE FOR MICROWAVE TUBES. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH081786B2 (en) | 1996-01-10 |
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