JPH0757668A - X-ray target - Google Patents
X-ray targetInfo
- Publication number
- JPH0757668A JPH0757668A JP19833693A JP19833693A JPH0757668A JP H0757668 A JPH0757668 A JP H0757668A JP 19833693 A JP19833693 A JP 19833693A JP 19833693 A JP19833693 A JP 19833693A JP H0757668 A JPH0757668 A JP H0757668A
- Authority
- JP
- Japan
- Prior art keywords
- ray
- cylindrical body
- rays
- electron beam
- ray target
- 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
- X-Ray Techniques (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子ビームが照射され
てＸ線を放出するＸ線ターゲットに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray target which emits X-rays when irradiated with an electron beam.
【０００２】[0002]
【従来の技術】空港や工場等において、Ｘ線検査装置を
用いた非破壊検査が行われている。Ｘ線検査装置は、Ｘ
線源から被検査物にＸ線を照射し、被検査物を透過した
Ｘ線を検出器で検出して透過画像を生成するものであ
る。これにより、空港では禁制品（銃刀砲、麻薬等）の
有無を検査したり、工場では溶接部の亀裂、欠陥等を検
査することができる。2. Description of the Related Art Non-destructive inspection using an X-ray inspection apparatus is performed at airports, factories and the like. X-ray inspection equipment
The inspection object is irradiated with X-rays from a radiation source, and the X-rays transmitted through the inspection object are detected by a detector to generate a transmission image. This makes it possible to inspect at airports for the presence of forbidden items (guns, narcotics, etc.), and to inspect the weld for cracks, defects, etc. at the factory.
【０００３】このようなＸ線検査装置のＸ線源は、タン
グステン等の重金属からなるターゲットに加速された電
子ビームを衝突させてＸ線を発生するようになってい
る。The X-ray source of such an X-ray inspection apparatus is designed to collide an accelerated electron beam with a target made of a heavy metal such as tungsten to generate X-rays.
【０００４】[0004]
【発明が解決しようとする課題】ところで、Ｘ線ターゲ
ットから放出されるＸ線はほぼ等方的に広がるため、必
要な方向へＸ線を放出したい場合には鉛等のシールド板
を用いてその放出方向を遮蔽板等を用いて規制しなけれ
ばならず、Ｘ線源が大型化すると共に重量が重くなって
しまう。The X-rays emitted from the X-ray target spread almost isotropically. Therefore, when it is desired to emit X-rays in a necessary direction, a shield plate made of lead or the like is used. The emission direction has to be regulated by using a shield plate or the like, and the X-ray source becomes large and heavy.
【０００５】そこで、本発明の目的は、上記課題を解決
し、小型で軽量のＸ線ターゲットを提供することにあ
る。Therefore, an object of the present invention is to solve the above problems and provide a compact and lightweight X-ray target.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明は、電子ビームが照射されてＸ線を放出するＸ
線発生部に、Ｘ線発生部と同一種類の材料からなり内面
が略円錘状に広がった筒体を、一体的に形成したもので
ある。To achieve the above object, the present invention provides an X-ray that is irradiated with an electron beam and emits an X-ray.
A cylindrical body made of the same material as that of the X-ray generating section and having an inner surface spreading in a substantially conical shape is integrally formed in the line generating section.
【０００７】[0007]
【作用】上記構成によれば、Ｘ線発生部に電子ビームが
照射されると、このＸ線発生部からＸ線が等方的に放出
されるが、放出されたＸ線は略円錘状に広がった筒体の
内面によって放出方向が規制される。すなわちＸ線ター
ゲット自身がシールド板として機能するので、Ｘ線が略
円錘状に放出される。従って、Ｘ線発生部のＸ線放出側
に鉛の遮蔽板を用いてその放出方向を規制する必要がな
くなり、Ｘ線源が小型軽量化される。According to the above construction, when the X-ray generation section is irradiated with the electron beam, the X-rays are isotropically emitted from the X-ray generation section, but the emitted X-rays have a substantially conical shape. The discharge direction is regulated by the inner surface of the cylindrical body that spreads in the direction. That is, since the X-ray target itself functions as a shield plate, X-rays are emitted in a substantially conical shape. Therefore, it is not necessary to use a lead shielding plate on the X-ray emission side of the X-ray generation unit to regulate the emission direction, and the X-ray source can be made smaller and lighter.
【０００８】[0008]
【実施例】以下、本発明の一実施例を添付図面に基づい
て詳述する。An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
【０００９】図１は本発明のＸ線ターゲットの一実施例
の断面図を示す図である。FIG. 1 is a sectional view showing an embodiment of the X-ray target of the present invention.
【００１０】同図において、１はタングステンからなる
筒体であり、加速された電子ビームｅ- がその一端（図
の左側）から入射されるようになっている。２は入射し
た電子ビームｅ- が通過するための通路であり、筒体１
の中心軸と同軸に形成されている。この筒体１の他端
（図の中央）の外側にはフランジ３が形成され、冷却水
が通る通路４となる略環状の溝５が形成されている。In the figure, reference numeral 1 is a cylindrical body made of tungsten, and an accelerated electron beam e - is made incident from one end (the left side of the figure) of the cylindrical body. Reference numeral 2 is a passage for the incident electron beam e − to pass through.
It is formed coaxially with the central axis of. A flange 3 is formed on the outer side of the other end (center in the figure) of the cylindrical body 1, and a substantially annular groove 5 which serves as a passage 4 through which cooling water passes is formed.
【００１１】筒体１の他端には、筒体１と同軸、かつ、
タングステンからなる筒体６がフランジ７を介して接続
されている。この筒体６の一端には溝５と共に冷却水が
通る通路４となる略環状の溝８が形成されている。フラ
ンジ７にはこの通路４に冷却水を供給するための通路９
となる溝１０と冷却後の水を排出するための通路１１と
なるべく溝１２が形成されている。The other end of the cylindrical body 1 is coaxial with the cylindrical body 1 and
A tubular body 6 made of tungsten is connected via a flange 7. A substantially annular groove 8 is formed at one end of the cylindrical body 6 together with the groove 5 and serves as a passage 4 through which cooling water passes. The flange 7 has a passage 9 for supplying cooling water to the passage 4.
A groove 12 is formed as much as a groove 10 and a passage 11 for discharging water after cooling.
【００１２】筒体６には中心軸と同軸、かつ、他端（図
の右側）に向かって広がった略円錘台状の穴１３が形成
されている。この穴１３の底部（図の中央部）は、加速
された電子ビームｅ- が筒体６の一端から照射される
と、他端側からＸ線を放出するＸ線発生部１４となって
いる。The cylindrical body 6 is formed with a hole 13 having a substantially truncated cone shape, which is coaxial with the central axis and widens toward the other end (right side in the figure). The bottom portion (center portion in the drawing) of the hole 13 serves as an X-ray generation unit 14 that emits X-rays from the other end side when the accelerated electron beam e − is irradiated from one end of the cylindrical body 6. .
【００１３】すなわち、Ｘ線ターゲットは、電子ビーム
ｅ- が照射されてＸ線を放出するＸ線発生部１４に、Ｘ
線発生部１４と同一種類の材料からなり内面が略円錘状
に広がった筒体６を一体的に形成したものである。[0013] That is, the X-ray target, the electron beam e - to be irradiated X-ray generation unit 14 emits X-rays, X
A cylindrical body 6 made of the same kind of material as the wire generating portion 14 and having an inner surface spreading in a substantially conical shape is integrally formed.
【００１４】筒体６の内面１５が形成する立体角θは利
用すべきＸ線の立体角に等しい角度になるように形成さ
れている。The solid angle θ formed by the inner surface 15 of the cylindrical body 6 is formed to be equal to the solid angle of the X-ray to be used.
【００１５】次に実施例の作用を述べる。Next, the operation of the embodiment will be described.
【００１６】加速された電子ビームｅ- が筒体１の通路
２に入射されてＸ線発生部１４の一端に照射されると、
このＸ線発生部１４の他端からＸ線が発生する。発生し
たＸ線は等方的に広がろうとするが、略円錘状に広がっ
た内面１５で規制され、立体角θで放出される。すなわ
ちＸ線ターゲット自身がシールド板として機能するの
で、Ｘ線ターゲットの出射側に鉛の遮蔽板を用いて、放
出方向を規制する必要がなくなり、Ｘ線源が小型軽量化
される。また、Ｘ線ターゲットには冷却水の通路９、１
１が形成されているので、冷却水路を外部に新たに設け
ることなく、電子ビームｅ- がＸ線発生部１４に照射さ
れるときに生じる熱によるＸ線発生部１４の劣化を防止
することができる。When the accelerated electron beam e - is incident on the passage 2 of the cylindrical body 1 and is radiated to one end of the X-ray generator 14,
X-rays are generated from the other end of the X-ray generation unit 14. Although the generated X-rays try to spread isotropically, they are regulated by the inner surface 15 spreading in a substantially conical shape and are emitted at a solid angle θ. That is, since the X-ray target itself functions as a shield plate, it is not necessary to use a lead shield plate on the emission side of the X-ray target to regulate the emission direction, and the X-ray source can be reduced in size and weight. Further, the cooling water passages 9 and 1 are provided in the X-ray target.
1 is formed, it is possible to prevent deterioration of the X-ray generation unit 14 due to heat generated when the X-ray generation unit 14 is irradiated with the electron beam e − without newly providing a cooling water channel outside. it can.
【００１７】尚、本実施例では筒体の材料としてタング
ステンを用いた場合で説明したが、これに限定されるも
のではなく、高温に耐え、錆に強い重金属であれば他の
材料を用いてもよい。In the present embodiment, the case where tungsten is used as the material of the cylindrical body has been described, but the present invention is not limited to this, and another material may be used as long as it is a heavy metal that withstands high temperatures and is resistant to rust. Good.
【００１８】[0018]
【発明の効果】以上要するに本発明によれば、次のよう
な優れた効果を発揮する。In summary, according to the present invention, the following excellent effects are exhibited.
【００１９】電子ビームが照射されてＸ線を放出するＸ
線発生部に、Ｘ線発生部と同一種類の材料からなり内面
が略円錘状に広がった筒体を、一体的に形成したので、
小型で軽量のＸ線ターゲットを実現することができる。X which is irradiated with an electron beam and emits X-rays
Since the cylindrical body made of the same kind of material as the X-ray generating section and having the inner surface spread out in a substantially conical shape is integrally formed in the ray generating section,
A compact and lightweight X-ray target can be realized.
【図１】本発明のＸ線ターゲットの一実施例の断面図を
示す図である。FIG. 1 is a diagram showing a cross-sectional view of one embodiment of an X-ray target of the present invention.
６ 筒 体 １４ Ｘ線発生部 6 Cylinder 14 X-ray generator
Claims (1)
Ｘ線発生部に、該Ｘ線発生部と同一種類の材料からなり
内面が略円錘状に広がった筒体を、一体的に形成したこ
とを特徴とするＸ線ターゲット。1. An X-ray generation section which emits X-rays when irradiated with an electron beam, is integrally provided with a cylindrical body made of the same kind of material as that of the X-ray generation section and having an inner surface spread out in a substantially conical shape. An X-ray target characterized by being formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19833693A JPH0757668A (en) | 1993-08-10 | 1993-08-10 | X-ray target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19833693A JPH0757668A (en) | 1993-08-10 | 1993-08-10 | X-ray target |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0757668A true JPH0757668A (en) | 1995-03-03 |
Family
ID=16389425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19833693A Pending JPH0757668A (en) | 1993-08-10 | 1993-08-10 | X-ray target |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757668A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013527922A (en) * | 2010-04-19 | 2013-07-04 | ゼネラル・エレクトリック・カンパニイ | Self-shielding targets for isotope production systems |
| CN103250225A (en) * | 2010-12-10 | 2013-08-14 | 佳能株式会社 | Radiation generating apparatus and radiation imaging apparatus |
| US9281155B2 (en) | 2010-12-10 | 2016-03-08 | Canon Kabushiki Kaisha | Radiation generating apparatus and radiation imaging apparatus |
-
1993
- 1993-08-10 JP JP19833693A patent/JPH0757668A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013527922A (en) * | 2010-04-19 | 2013-07-04 | ゼネラル・エレクトリック・カンパニイ | Self-shielding targets for isotope production systems |
| CN103250225A (en) * | 2010-12-10 | 2013-08-14 | 佳能株式会社 | Radiation generating apparatus and radiation imaging apparatus |
| US20130235975A1 (en) * | 2010-12-10 | 2013-09-12 | Canon Kabushiki Kaisha | Radiation generating apparatus and radiation imaging apparatus |
| US9281155B2 (en) | 2010-12-10 | 2016-03-08 | Canon Kabushiki Kaisha | Radiation generating apparatus and radiation imaging apparatus |
| US9373478B2 (en) * | 2010-12-10 | 2016-06-21 | Canon Kabushiki Kaisha | Radiation generating apparatus and radiation imaging apparatus |
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