JPH05159729A - Radiation transmitting window structure - Google Patents
Radiation transmitting window structureInfo
- Publication number
- JPH05159729A JPH05159729A JP32263291A JP32263291A JPH05159729A JP H05159729 A JPH05159729 A JP H05159729A JP 32263291 A JP32263291 A JP 32263291A JP 32263291 A JP32263291 A JP 32263291A JP H05159729 A JPH05159729 A JP H05159729A
- Authority
- JP
- Japan
- Prior art keywords
- transmitting window
- radiation transmitting
- window structure
- radiation
- vacuum container
- 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
Landscapes
- Measurement Of Radiation (AREA)
- Electron Tubes For Measurement (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば回転陽極型Ｘ
線管に使用して好適な放射線透過窓構体に関する。BACKGROUND OF THE INVENTION The present invention relates to a rotary anode type X, for example.
The present invention relates to a radiation transmitting window structure suitable for use in a wire tube.
【０００２】[0002]
【従来の技術】一般に、Ｘ線管は例えばＸ線診断として
医療用等に利用されているが、胃の検診などの場合に
は、図２に示すＸ線管が使用されている。このＸ線管
は、いわゆる回転陽極型と言われるもので、ガラス製真
空容器１内に偏心した陰極２と略傘状の陽極タ−ゲット
３が対向配設され、陽極タ−ゲット３は回転機構４によ
り支持され、且つ回転出来るようになっている。更に、
真空容器１には、陽極タ−ゲット３に対応する位置に放
射線透過窓構体５が設けられている。2. Description of the Related Art Generally, an X-ray tube is used for medical purposes, for example, as an X-ray diagnosis, but in the case of stomach examination, the X-ray tube shown in FIG. 2 is used. This X-ray tube is of a so-called rotating anode type, in which an eccentric cathode 2 and a substantially umbrella-shaped anode target 3 are disposed opposite to each other in a glass vacuum container 1, and the anode target 3 rotates. It is supported by the mechanism 4 and can rotate. Furthermore,
The vacuum container 1 is provided with a radiation transmitting window structure 5 at a position corresponding to the anode target 3.
【０００３】この放射線透過窓構体５は、従来、図３に
示すように構成され、ベリリウム製放射線透過窓６が鉄
製支持リング７にろう材８により気密接合されている。
そして、この支持リング７がコバ−ル製支持リング９に
先端１０でヘリア−ク溶接され、この支持リング９はガ
ラス製真空容器１に封着されている。This radiation transmitting window structure 5 is conventionally constructed as shown in FIG. 3, and a beryllium radiation transmitting window 6 is airtightly joined to an iron support ring 7 by a brazing material 8.
The support ring 7 is welded to the Kovar support ring 9 at the tip 10 and the support ring 9 is sealed to the glass vacuum container 1.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来の放
射線透過窓構体５においては、次のような不都合があ
る。 (1) ろう付け時に発生する熱により、放射線透過窓６に
クラックが発生し易い。 (2) ろう付け時のろう材８の溶解時に起こるろう材８の
放射線透過窓６へのスパッタにより、放射線透過窓６に
不純物が付着し、画像不良を招く恐れがある。 (3) ろう付け不完全から真空不良が発生し易い。この発
明は、クラックの発生や真空不良の発生の恐れがなく、
温度差が吸収され破損の恐れが少ない放射線透過窓構体
を提供することを目的とする。The conventional radiation transmitting window structure 5 as described above has the following disadvantages. (1) Cracks are easily generated in the radiation transmitting window 6 due to heat generated during brazing. (2) Sputtering of the brazing material 8 onto the radiation transmitting window 6 that occurs when the brazing material 8 is melted during brazing may cause impurities to adhere to the radiation transmitting window 6 and cause an image defect. (3) Vacuum failure is likely to occur due to incomplete brazing. This invention, without the risk of the occurrence of cracks and vacuum defects,
An object of the present invention is to provide a radiation transmitting window structure that absorbs a temperature difference and is less likely to be damaged.
【０００５】[0005]
【課題を解決するための手段】この発明は、真空容器に
放射線透過窓が気密接合されてなり、更に上記の放射線
透過窓は中央部がベリリウムで周縁部が鉄合金であっ
て、且つ途中に両金属の含有量が徐々に変化する領域を
有する傾斜機能材により構成され、周縁部が真空容器に
直接又は他の部材を介して気密接合されてなる放射線透
過窓構体である。According to the present invention, a radiation transmitting window is airtightly joined to a vacuum container, and the radiation transmitting window has a beryllium at the center and an iron alloy at the periphery, and in the middle thereof. The radiation transmitting window structure is composed of a functionally graded material having a region in which the contents of both metals gradually change, and the peripheral portion is airtightly bonded to the vacuum container directly or via another member.
【０００６】[0006]
【作用】この発明によれば、放射線透過窓を支持リング
にろう付けする必要がない。従って、クラックの発生
や、ろう材の放射線透過窓へのスパッタ現象、およびろ
う付け不完全による真空不良の発生の恐れがない。又、
動作中に放射線透過窓の中央部と支持リングとの間に温
度差が生じても、この温度差による膨脹が含有量変化領
域で無理なく吸収されるので、破損の恐れが少ない。According to the present invention, it is not necessary to braze the radiation transmitting window to the support ring. Therefore, there is no fear of generation of cracks, spattering phenomenon of the brazing material on the radiation transmitting window, and vacuum failure due to incomplete brazing. or,
Even if a temperature difference occurs between the central portion of the radiation transmitting window and the support ring during operation, expansion due to this temperature difference is naturally absorbed in the content change region, so there is little risk of damage.
【０００７】[0007]
【実施例】以下、図面を参照して、この発明の一実施例
を詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.
【０００８】この発明による放射線透過窓構体は、図１
に示すように構成され、従来例（図３）と同一箇所は同
一符号を付すことにすると、真空容器１の一部であるコ
バ−ル製支持リング９に放射線透過窓１１が接合されて
いる。A radiation transmitting window structure according to the present invention is shown in FIG.
As shown in FIG. 3, the same parts as those in the conventional example (FIG. 3) are designated by the same reference numerals, and the radiation transmitting window 11 is joined to the Kovar support ring 9 which is a part of the vacuum container 1. .
【０００９】この場合、放射線透過窓１１は、その中央
部１１ａがベリリウムで周縁部１１ｂが鉄合金であっ
て、且つ途中に両金属の含有量が徐々に変化する領域１
１ｃを有する傾斜機能材により構成されている。そし
て、鉄合金からなる周縁部１１ｂが、真空容器１の一部
であるコバ−ル製支持リング９に、先端１２でヘリア−
ク溶接され気密接合されている。In this case, in the radiation transmitting window 11, the central portion 11a is beryllium and the peripheral portion 11b is an iron alloy, and the content of both metals gradually changes in the middle of the region 1.
It is composed of a functionally graded material having 1c. A peripheral edge 11b made of an iron alloy is attached to a support ring 9 made of Kovar, which is a part of the vacuum container 1, at a tip 12 of a heirer.
It is welded and airtightly joined.
【００１０】ここで、傾斜機能材について説明する。
今、Ａ，Ｂ２つの材料を接合すると両者の長所を利用出
来るが、熱膨脹率の違いから曲がったり、剥がれたりし
易いという難点がある。しかし、傾斜機能材は境界面で
材質をＡからＢに徐々に変化させて焼結したものであ
り、こうした欠点を解消したものである。尚、詳しくは
例えば雑誌「工業材料」第３８巻第１２号，第１４号
（平成２年１０月，同１１月発行）に紹介されているも
のである。Here, the functionally graded material will be described.
When the two materials A and B are joined together, the advantages of the two can be utilized, but there is a drawback that they tend to bend or peel off due to the difference in thermal expansion coefficient. However, the functionally graded material is obtained by gradually changing the material from A to B at the boundary surface and sintering the material, thus eliminating such a defect. The details are introduced, for example, in the magazine "Industrial Materials" Vol. 38, No. 12, No. 14 (issued in October, 1990 and November).
【００１１】[0011]
【発明の効果】この発明によれば、放射線透過窓は中央
部がベリリウムで周縁部が鉄合金であって、且つ途中に
両金属の含有量が徐々に変化する領域を有する傾斜機能
材により構成されているので、放射線透過窓を支持リン
グにろう付けする必要がない。その結果、クラックの発
生や、ろう材の放射線透過窓へのスパッタ現象、および
ろう付け不完全による真空不良の発生の恐れがない。
又、動作中に放射線透過窓の中央部と支持リングとの間
に温度差が生じても、この温度差による膨脹が含有量変
化領域で無理なく吸収されるので、破損の恐れが少な
い。According to the present invention, the radiation transmitting window is formed of a functionally graded material having a region in which the central portion is beryllium and the peripheral portion is an iron alloy, and which has a region in which the contents of both metals gradually change. Therefore, it is not necessary to braze the radiation transmitting window to the support ring. As a result, there is no risk of cracks, spattering of the brazing material on the radiation transmitting window, and vacuum failure due to incomplete brazing.
Further, even if a temperature difference occurs between the central portion of the radiation transmitting window and the support ring during operation, expansion due to this temperature difference is absorbed in the content change region without difficulty, so there is little risk of damage.
【図１】この発明の一実施例に係る放射線透過窓構体を
示す縦断面図。FIG. 1 is a longitudinal sectional view showing a radiation transmitting window structure according to an embodiment of the present invention.
【図２】一般的な回転陽極型Ｘ線管を示す概略縦断面
図。FIG. 2 is a schematic vertical sectional view showing a general rotary anode type X-ray tube.
【図３】従来の放射線透過窓構体を示す縦断面図。FIG. 3 is a vertical sectional view showing a conventional radiation transmitting window structure.
【符号の説明】 １…真空容器、９…支持リング、１１…放射線透過窓、
１１ａ…中央部、１１ｂ…周縁部、１１ｃ…領域、１２
…ヘリア−ク溶接。[Explanation of Codes] 1 ... Vacuum container, 9 ... Support ring, 11 ... Radiation transparent window,
11a ... central part, 11b ... peripheral part, 11c ... region, 12
… Heliac welding.
Claims (1)
てなる放射線透過窓構体において、 上記放射線透過窓は中央部がベリリウムで周縁部が鉄合
金であって、且つ途中に両金属の含有量が徐々に変化す
る領域を有する傾斜機能材により構成され、上記周縁部
が上記真空容器に直接又は他の部材を介して気密接合さ
れてなることを特徴とする放射線透過窓構体。1. A radiation transmitting window structure comprising a vacuum container and a radiation transmitting window hermetically bonded to each other, wherein the radiation transmitting window has a beryllium at a central portion and an iron alloy at a peripheral portion, and the contents of both metals are included in the middle thereof. Is composed of a functionally graded material having a gradually changing region, and the peripheral portion is hermetically bonded to the vacuum container directly or through another member, and the radiation transmitting window structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32263291A JPH05159729A (en) | 1991-12-06 | 1991-12-06 | Radiation transmitting window structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32263291A JPH05159729A (en) | 1991-12-06 | 1991-12-06 | Radiation transmitting window structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05159729A true JPH05159729A (en) | 1993-06-25 |
Family
ID=18145881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32263291A Pending JPH05159729A (en) | 1991-12-06 | 1991-12-06 | Radiation transmitting window structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05159729A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07312189A (en) * | 1994-05-16 | 1995-11-28 | Yusuke Shida | Manufacture of frit sealed x-ray tube |
| JP2002367550A (en) * | 2001-06-07 | 2002-12-20 | Hitachi Medical Corp | X-ray tube device |
-
1991
- 1991-12-06 JP JP32263291A patent/JPH05159729A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07312189A (en) * | 1994-05-16 | 1995-11-28 | Yusuke Shida | Manufacture of frit sealed x-ray tube |
| JP2002367550A (en) * | 2001-06-07 | 2002-12-20 | Hitachi Medical Corp | X-ray tube device |
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