JPS5853137A - Permanent magnet for traveling wave tube - Google Patents
Permanent magnet for traveling wave tubeInfo
- Publication number
- JPS5853137A JPS5853137A JP15171381A JP15171381A JPS5853137A JP S5853137 A JPS5853137 A JP S5853137A JP 15171381 A JP15171381 A JP 15171381A JP 15171381 A JP15171381 A JP 15171381A JP S5853137 A JPS5853137 A JP S5853137A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- diameter
- groove
- wave tube
- traveling wave
- 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
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
- H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
- H01J23/087—Magnetic focusing arrangements
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
本発明（ま、を子ビーム集束用に周期永久磁石を使用し
た進行波管の磁石の構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a traveling wave tube magnet using periodic permanent magnets for beam focusing.
進行波管はマイクロ波帯からンり波帯にお妙る電力増幅
用の電子管であり、その構造概略は第１図に示されてい
る。第１図において、ｌが電子銃部、２が高周波回路部
、３がコレクタ部を示す。A traveling wave tube is an electron tube for power amplification ranging from a microwave band to a ring wave band, and its structure is schematically shown in FIG. In FIG. 1, l indicates an electron gun section, 2 indicates a high frequency circuit section, and 3 indicates a collector section.
、、−−ｗ ＃、−Ｍ ／Ｆ％ ＃＆Ｉ引【ｗｐ
Ｑ ｉ？ｘｊ−ｚ ？ ＃ｌ−１−４ｋｌｘ＊で描
かれているが、大電力管においては通常このような寸法
関係にある。高周波回路部２の外側には周期永久磁石（
以後ＰＰＭという）が配置さｎｌこれはポールピース４
と磁石５の交互積み上げの形ヲとっている。第２図（ａ
） 、 （ｂｌは前記ポールピース４．磁石５の外観図
を示す。ポールピースは円板の中央部に突起をもった形
をしており、磁石はある厚さをもったリング状をしてい
る。磁石は管がベーキング及び排気工程を通過した後と
９つけられるが、前述のように電子銃部、コレクタ部の
外径が高周波回路部の外径より大きい場合には、磁石は
第２図（ｂｌに示すように半割にさｎる必要がある。,,--w #,-M /F% #&I pull [wp
Qi? xj-z? Although drawn as #l-1-4klx*, large power tubes usually have such a dimensional relationship. A periodic permanent magnet (
(hereinafter referred to as PPM) is placed nl This is pole piece 4
and magnets 5 are stacked alternately. Figure 2 (a
), (bl shows an external view of the pole piece 4 and magnet 5. The pole piece is shaped like a disk with a protrusion in the center, and the magnet is shaped like a ring with a certain thickness. The magnet is attached after the tube passes through the baking and evacuation process, but as mentioned above, if the outer diameter of the electron gun section and collector section is larger than the outer diameter of the high frequency circuit section, the magnet is attached to the second tube. It is necessary to cut it in half as shown in the figure (bl).
この磁石をうまく半割りにする方法について従来適当な
方法がなく、この段階における磁石の不良品の発生率が
極めて高かった。不良の例を第３図に示す。同図におい
て、（ａ）は割れ方が斜めになった場合、（ｂ）はふた
つの割れ位置が直径上にない場合、（Ｃ）は割れ位置が
磁石の表と裏で異なり破断面が斜めになった場合を示す
。（ａｌの場合には牛割後の磁石に鋭角の部分ができる
から磁石が欠けやすくなり、後工程における特別の注意
が必要になる。（ｂ）の場合に？′ｉ、磁石がポールピ
ースに入９にくくなる。（Ｃ）の場合には最終組立時の
磁石の厚さにバラツキが出やすくなる。こうした不良の
磁石を管に取りつけるＫは高度の技能と多大な時間が必
要となり進行波管の製造コストが高くなる原因となって
いた。Conventionally, there has been no suitable method for halving this magnet, and the incidence of defective magnets at this stage was extremely high. An example of a defect is shown in FIG. In the same figure, (a) shows the case where the crack is diagonal, (b) shows the case where the two crack positions are not on the same diameter, and (C) shows the case where the crack position is different on the front and back of the magnet and the fracture surface is diagonal. Indicates the case when (In the case of al, sharp edges are formed in the magnet after splitting, making the magnet easy to chip and requiring special care in the subsequent process.) In the case of (b), the magnet is attached to the pole piece. In the case of (C), variations in the thickness of the magnets are likely to occur during final assembly. Attaching these defective magnets to the tube requires a high degree of skill and a great deal of time, and traveling wave tubes This caused the manufacturing cost to increase.
本発明の目的は、上述した従来方法の火点を改良するた
めの新しい磁石構造を提供するものである。本発明によ
る磁石構造を第４図に示す。本発明においては磁石の片
面の直径上に溝部６が設けられている。溝の幅は０．５
〜１ｍｌ！ｆ％溝の深さは磁石の厚さのト十程度である
。溝を設けることによりこの部分の機械的強度が弱まる
から、磁石の半割りに際して第３図に示されるような不
良が出る可能性は極めて少なくなる。The object of the present invention is to provide a new magnet structure to improve the flash point of the conventional methods mentioned above. A magnet structure according to the invention is shown in FIG. In the present invention, a groove 6 is provided on the diameter of one side of the magnet. The width of the groove is 0.5
~1ml! The depth of the f% groove is about 10 times the thickness of the magnet. Since the mechanical strength of this portion is weakened by providing the groove, the possibility of a defect as shown in FIG. 3 occurring when the magnet is cut in half is extremely reduced.
本発明による第２の磁石構造を第５図に示す。A second magnet structure according to the invention is shown in FIG.
この場合、磁石の両面の直径上に溝６が設けられており
、分割に際しての均一度は更に高まる。In this case, grooves 6 are provided on the diameter of both sides of the magnet, further increasing the uniformity of division.
本発明の実施により、磁石の製造効率が著しく改善され
、このためＰＰＭのコストダウンの点でも効果的である
ことが確認された。また磁石を管に組み込むための時間
も従来のそれに比して約３０係低減できることが確認さ
れた。It has been confirmed that the implementation of the present invention significantly improves the manufacturing efficiency of magnets, and is therefore effective in reducing the cost of PPM. It has also been confirmed that the time required to assemble the magnet into the tube can be reduced by about 30 times compared to the conventional method.
明の第一の実権例を示し、第５図はＭ２の実施例を示す
。
ｌ・・・・・・電子銃部、２・・・・・・高周波回路部
、３・・・・・・コレクタ都、４・・・・・・ポールピ
ース％ ５・・・・・・磁石。
６・・・・・・溝。FIG. 5 shows the first embodiment of M2. l...Electron gun section, 2...High frequency circuit section, 3...Collector capital, 4...Pole piece% 5...Magnet . 6...Groove.
Claims (1)
周期永久値石を構成する中空円板形状の各磁石はその片
面あるいは両面の直径上に溝部を有しこの溝部において
磁石が２分割されているヒとを特徴とする進行波管用永
久磁石。Used in a conductive wave tube with a periodic magnetic field beam focusing device 1
A permanent magnet for a traveling wave tube, characterized in that each of the hollow disc-shaped magnets constituting the periodic permanent value stone has a groove portion on the diameter of one or both sides thereof, and the magnet is divided into two parts at the groove portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15171381A JPS5853137A (en) | 1981-09-25 | 1981-09-25 | Permanent magnet for traveling wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15171381A JPS5853137A (en) | 1981-09-25 | 1981-09-25 | Permanent magnet for traveling wave tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5853137A true JPS5853137A (en) | 1983-03-29 |
Family
ID=15524642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15171381A Pending JPS5853137A (en) | 1981-09-25 | 1981-09-25 | Permanent magnet for traveling wave tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5853137A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01215987A (en) * | 1988-02-23 | 1989-08-29 | Nippon Boshoku Kogyo Kk | Method for preventing corrosion of marine steel structure |
| JPH01298186A (en) * | 1988-05-24 | 1989-12-01 | Nippon Boshoku Kogyo Kk | Method for preventing corrosion of marine steel structure and corrosion preventing protective cover |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139734A (en) * | 1979-04-18 | 1980-10-31 | Toshiba Corp | Manufacture of direct-heating type cathode structure |
-
1981
- 1981-09-25 JP JP15171381A patent/JPS5853137A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139734A (en) * | 1979-04-18 | 1980-10-31 | Toshiba Corp | Manufacture of direct-heating type cathode structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01215987A (en) * | 1988-02-23 | 1989-08-29 | Nippon Boshoku Kogyo Kk | Method for preventing corrosion of marine steel structure |
| JPH01298186A (en) * | 1988-05-24 | 1989-12-01 | Nippon Boshoku Kogyo Kk | Method for preventing corrosion of marine steel structure and corrosion preventing protective cover |
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