JPS6122545A - X-ray tube - Google Patents
X-ray tubeInfo
- Publication number
- JPS6122545A JPS6122545A JP60089877A JP8987785A JPS6122545A JP S6122545 A JPS6122545 A JP S6122545A JP 60089877 A JP60089877 A JP 60089877A JP 8987785 A JP8987785 A JP 8987785A JP S6122545 A JPS6122545 A JP S6122545A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- ray tube
- electron beam
- tube according
- cathode
- 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
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
- H01J35/064—Details of the emitter, e.g. material or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
- H01J35/30—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof by deflection of the cathode ray
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
- H01J35/147—Spot size control
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はＸ線管、特に電子輝度の高い微小焦点を作り出
すことができる微小焦点式Ｘ線管に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray tube, and particularly to a microfocus type X-ray tube that can create a microfocus with high electron brightness.
微小焦点式Ｘ線管は工業、医学、科学など、応用分野は
広（なるばかりである。その数多い用途＋７）中ニハマ
イクロエレクトロニクス工業におけるＸ線ＩＪ ）グラ
フィ、金属工業における非破壊試験、医学における腫瘍
の診断、すなわち乳癌の早期発見などがある。Microfocus X-ray tubes have a wide range of applications, including industry, medicine, and science. This includes tumor diagnosis, or early detection of breast cancer.
これまでにも多くの微小焦点式Ｘ線管が開発されて現在
使用されているが、これら周知のものはまだ全（満足で
きるものとはいえない。周知のＸ線管の生み出す焦点は
、大抵１６０〜７５０ ミクロン程度のものであるが、
多くの用途では１００ミクロンまたはそれ以下と、これ
よりずっと小さな焦点が求められている。他にこれ位小
さな焦点を作れる周知のＸ線管では、輝度が足りない。Although many microfocusing X-ray tubes have been developed and are currently in use, these well-known X-ray tubes are still not completely satisfactory. It is about 160 to 750 microns,
Many applications require much smaller focal points of 100 microns or less. Other well-known X-ray tubes that can create such a small focus are not bright enough.
さらに焦点が小さくしかも輝度も高いＸ線管もあるが、
これらは構成が非常に複雑で高価につ（上、通常は磁界
を生成するために重い磁石が必要であり、および／′！
ｉ＋たは個々の用途毎に電極を特別な幾何学的配置にす
ることが必要である。There are also X-ray tubes with smaller focal points and higher brightness,
These are very complex and expensive to construct (and usually require heavy magnets to generate the magnetic field, and/'!
A special geometry of the electrodes is required for each individual application.
本発明の目的は上述のような面で利点を有する微小焦点
式Ｘ線管を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a microfocusing X-ray tube that has the advantages mentioned above.
より詳細に言うと、本発明の目的は、輝度の高い微小焦
点を形成し得ると共に、構成が単純かつ小型化されてお
り、個々の用途の要件に従って広範囲の電圧、電流、お
よび焦点の大きさで動作できる微小焦点式Ｘ線管を提供
することである。More specifically, it is an object of the present invention to be able to form microfocal points with high brightness, while being simple and compact in construction, and capable of operating over a wide range of voltages, currents, and focus sizes according to the requirements of the individual application. An object of the present invention is to provide a microfocusing X-ray tube that can operate at
本発明によると、真空エンベロープから成り、前記エン
ベロープ内の陰極が電子ビームを発生し、前記エンベロ
ープ内の標的陽極が電子ビームの衝突全党けてその中に
ある窓を通してエンベロープ外部にＸ線を発生し、前記
陰極と標的陽極との間にある電極システムが前記標的陽
極に電子ビームが衝突する前にその電子ビームを制御す
る微小焦点式Ｘ線管であって、前記陰極は電流密度が高
（て均等であり輝度の高い電子ビームを放出する電子ビ
ーム放出面を有するピアス銃型式のディスペンサ陰極で
あり、前記電極システムが、前記ディスペンサ陰極を取
囲みかつ電子ビームを初期的に集束するビーム集束構造
を有するピアス銃型式の第１開口電極と、第１電極の前
方に間隔をあけて配置されかつ電子ビームの流れを制御
するための電位がかかるように構成された第２開口電極
と、前記第２電極の前方に配置されて電子ビームが前記
標的陽極に衝突する前にさらに電子ビームを集束するさ
らに別の電極手段とを含んでいることを特徴とするＸ線
管が提供される。According to the invention, it consists of a vacuum envelope, a cathode within said envelope generates an electron beam, and a target anode within said envelope generates X-rays outside the envelope through a window located therein during every impingement of the electron beam. a microfocusing X-ray tube in which an electrode system between the cathode and the target anode controls the electron beam before it impinges on the target anode; a pierce gun type dispenser cathode having an electron beam emitting surface that emits a uniform and highly bright electron beam, the electrode system surrounding the dispenser cathode and a beam focusing structure that initially focuses the electron beam; a first aperture electrode in the form of a pierce gun, the second aperture electrode being spaced in front of the first electrode and configured to be applied with a potential for controlling the flow of the electron beam; An X-ray tube is provided, characterized in that it includes further electrode means arranged in front of the two electrodes for further focusing the electron beam before it impinges on the target anode.
以千に説明する本発明の好適実施態様では、最後に挙げ
たさらに別の電極手段は、第２電極の前方に間隔をあけ
て配置されておりかつ電子ビームをさらに集束するため
の電位がかかるように構成された第３の開口電極と、第
３電極の前方に間隔をあけて配置されておりかつ電子ビ
ームをさらに集束するための電位がかかるように構成さ
れた第４の開口電極とを含んでいる。In a preferred embodiment of the invention described above, the last-mentioned further electrode means are spaced apart in front of the second electrode and are subjected to an electrical potential for further focusing the electron beam. a third aperture electrode configured as such, and a fourth aperture electrode disposed at a distance in front of the third electrode and configured to be applied with a potential for further focusing the electron beam. Contains.
Ｘ線管において一般的に用いられる従来型式の陰極線管
電子銃の代わりに、本発明のｘｍ管はディスペンサ陰極
と、このディスペンサ陰極を取囲むピアス鏡型の集束電
極とを用いている。ピアス銃は普通マイクロ波管に用い
られるものであるが、このような用途では電子ビームを
微小な点に集束する必要はないため、主として電子ノイ
ズを防止するための層流を作り出すのに使用されている
。Instead of the conventional cathode ray tube electron gun commonly used in x-ray tubes, the xm tube of the present invention uses a dispenser cathode and a pierced mirror-type focusing electrode surrounding the dispenser cathode. Pierce guns are commonly used in microwave tubes, but since there is no need to focus the electron beam to a minute point in such applications, they are primarily used to create laminar flow to prevent electronic noise. ing.
ピアス銃集束電極はビームをその初めの直径の約２分の
１から３分の１に集束するが、これでは微小焦点Ｘ線管
にはまだまだ不十分である。しかし本発明による新規の
Ｘ線管は、ピアス銃型式のディスペンサ陰極を用いて電
流密度が均等で高り４、−輝度も高いビーム金供する。Pierce gun focusing electrodes focus the beam to about one-half to one-third of its original diameter, which is still insufficient for microfocus x-ray tubes. However, the new x-ray tube of the present invention uses a pierce gun type dispenser cathode to provide a beam with uniform and high current density4-and high brightness.
また電子顕微鏡のシステムにいくらか似た電極システム
も含まれており、電子ビームが標的陽極に衝突する前に
それを集束する働きをする。このように、マイクロ波管
に使用される従来型のピアス銃が最終的電子ビーム径を
元の直径の約２分の１から３分の１にするのに対し、本
発明のＸ線管は電子ビーム径を元の約１６分の１ｔたは
それ以下にする。It also includes an electrode system, somewhat similar to that of an electron microscope, which serves to focus the electron beam before it impinges on the target anode. Thus, whereas conventional piercing guns used in microwave tubes reduce the final electron beam diameter to about one-half to one-third of the original diameter, the X-ray tube of the present invention The electron beam diameter is reduced to approximately 1/16th of the original diameter or less.
以下により詳細な説明をするが、微小焦点式Ｘ線管は本
発明のもつ以上のような特徴に従って構成されることに
よって、径が非常に小さく（４０ミクロン程度の）、電
子輝度の高いＸ線スポットを生み出すことができ、しか
も個々の用途における要件に従って変化する電圧、電流
、焦点の大きさなどを含むいろいろな動作条件に幅広く
対応できる。もう１つ重要な利点は、本発明のＸ線管は
磁石や特別の幾何学的配置をもつ複雑な電極システムを
必要としないため、非常に簡単でコンノ３クトな形に構
成できる点である。As will be explained in more detail below, the microfocusing X-ray tube is configured according to the above features of the present invention, and has a very small diameter (about 40 microns) and can emit X-rays with high electronic brightness. It can produce a spot and is compatible with a wide variety of operating conditions, including voltage, current, focus size, etc., which vary according to the requirements of the individual application. Another important advantage is that the X-ray tube of the invention does not require magnets or complex electrode systems with special geometries, so it can be constructed in a very simple and compact manner. .
本発明のその他の特徴および利点については、以下の説
明から明らかとなろう。Other features and advantages of the invention will become apparent from the description below.
ここに添付図面を参照しなから釈明する本発明は単なる
例示である。The invention, as herein described without reference to the accompanying drawings, is by way of example only.
第１図に示されたＸ線管は、例えばガラスまたはセラミ
ックス製の真空エンベロープ２から成り、真空エンベロ
ープ２は１端部で電子銃アセンブリ３を取囲んでおり、
また反対側の端部では電子ビームが衝突して窓５を通し
てＸ線を管の外側に向けて放出する標的陽極４を含む陽
極アセンブリを取囲んでいる。電子銃アセンブリ３につ
いては第２図により詳細に後述することにする。陽極ア
センブリは従来型式のもので良いが、標的陽極４はタン
グステンめっきした銅製とし、油などの冷却流体が循環
できるように中空構造とする。管の窓５もベリリウムな
どの従来型の構造で良い。標的陽極から発生されたＸ線
は、従来構造のＸ線管の場合と同様、窓５から出る前に
まず非集束７アラデーケージ６を通過する。The X-ray tube shown in FIG. 1 consists of a vacuum envelope 2, for example made of glass or ceramics, which surrounds an electron gun assembly 3 at one end,
The opposite end also surrounds an anode assembly containing a target anode 4 on which the electron beam impinges and emits X-rays towards the outside of the tube through a window 5. The electron gun assembly 3 will be described in detail later with reference to FIG. Although the anode assembly may be of conventional type, the target anode 4 is made of tungsten-plated copper and is hollow to allow circulation of a cooling fluid such as oil. The tube window 5 may also be of conventional construction, such as beryllium. The X-rays generated from the target anode first pass through a defocusing 7 Alladay cage 6 before exiting through the window 5, as in conventionally constructed X-ray tubes.
しかし電子銃アセンブリ３の方は特殊な構成であって、
第２図により詳細に示されている。図示のように、電子
銃アセンブリ３はディスペンサ陰極ｌＯから成る陰極ア
センブリを含み、ディスペンサ陰極１０は電流密度が均
等で高く、輝度も、高い電子ビームを放出する電子放出
表面１１を有する。陰極１０は導線１３を経由して電流
の供給を受けるヒータフィラメント１２より間接的に加
熱される。However, the electron gun assembly 3 has a special configuration,
This is shown in more detail in FIG. As shown, the electron gun assembly 3 includes a cathode assembly consisting of a dispenser cathode 10 having an electron emitting surface 11 that emits a uniformly high current density, high brightness electron beam. The cathode 10 is indirectly heated by a heater filament 12 which is supplied with current via a conductive wire 13.
ディスペンサ陰極１０の電子放出面１１は開口電極１４
に取囲１れており、開口電極１４はピアス銃型式でもあ
り電子ビームに初期的集束効果を与えるビーム集束構造
を有している。したがって陰極の電子放出表面１１は断
面円形のビームを放出するべく円形形状とし、電極１４
は陰極の電位となるが、従来のピアス銃構造と同様陰極
表面１１から放出させるビームを元の直径の２分の１ま
たは３分の１に集束するべ（凹形形状とする。The electron emitting surface 11 of the dispenser cathode 10 is an open electrode 14
The aperture electrode 14 is also of the Pierce gun type and has a beam focusing structure that provides an initial focusing effect on the electron beam. Therefore, the electron emitting surface 11 of the cathode is circular in shape to emit a beam with a circular cross section, and the electrode 14
is the potential of the cathode, and the beam emitted from the cathode surface 11 should be focused to one-half or one-third of its original diameter (with a concave shape), similar to conventional piercing gun structures.
但し従来のピアス銃と異なる点は、電極１４と標的陽極
４（第１図）の間の電極システムの中にさらに３つの開
口電極が含まれる点である。つまり開口電極１５はピア
ス型集束電極のすぐ前にあって電子ビームの電流を制御
する電位がかかるように構成されている。開口電極１６
は電極１５のすぐ前にあり、電子ビームをさらに集束す
るための電位がかかるように構成されている。そして平
面部分１７ａとビーム集束部分１７ｂを含む電極１７は
電極１６のすぐ前にあり、電子ビームをさらに集束する
ための電位がかかるように構成されている。However, unlike conventional piercing guns, three additional aperture electrodes are included in the electrode system between electrode 14 and target anode 4 (FIG. 1). That is, the aperture electrode 15 is located immediately in front of the pierced focusing electrode and is configured to be applied with a potential that controls the current of the electron beam. Opening electrode 16
is located directly in front of the electrode 15 and is configured to be applied with a potential to further focus the electron beam. An electrode 17 including a flat portion 17a and a beam focusing portion 17b is located immediately in front of the electrode 16 and is configured to be applied with a potential for further focusing the electron beam.
電極１５，１６．１７およびフィラメントヒータ１２を
含む陰極アセンブリへの電気的結線は、管の基部を貫通
する導体ピン２０を通って行われる。Electrical connections to the cathode assembly, including electrodes 15, 16, 17 and filament heater 12, are made through conductor pins 20 that pass through the base of the tube.
さらに陰極アセンブリは内側対流熱遮蔽２１と外側放射
遮蔽２２も含み、どちらも金属製で周知の構造のもので
ある。The cathode assembly also includes an inner convective heat shield 21 and an outer radiant shield 22, both of which are metallic and of known construction.
図示の構造では、ディスペンサ陰極１０の電子放出表面
１１は直径１〜２ａｓ＋のものである。ピアス型集束電
極１４は電子ビームの直径を約２分の１に縮小するよう
に構成されている。電極１５は電極１４の０．８〜１．
２２鱈前方に、望ましくは１．９篩前方に配置されてお
り、電子ビームの電流を制ａするべり２００〜１．５０
０ボルトの電位がかかるように構成されている。電極１
６は電極１５の１．６〜２．４−１望ましくは２．０閣
前方に配置されており、８００〜１．５００ボルトの電
位がかかるように構成されていてその開口部を通過する
電子ビームに対して集束作用を与える。電極１７の平面
部分１７ａは電極１６の１．６〜２．４ ａｎ、望まし
くは２．０問前方に配置されており、１，０００〜５，
０００ボルトの電位がかかるように構成されていて電子
ビームにさらに集束作用を与えるため、電子ビームの直
径は最終的に、ディスペンサ陰極１０の電子放出表面１
１から放出された時の元の直径の１６分の１またはそれ
以下まで小さくなる。陽極・陰極電圧は５ｋＶから１０
０ｋＶまで変化し得る。また電子流は２ｍＡから２０ｍ
Ａまで変化できる・このようなＸ線管では電子ビーム輝
度（Ｂｌが１１００ｋ／ｓｎ２で４０ミクロンから１，
５００ミク四ンの間の大きさのスポットを作り出すこと
ができ、動作時間としては１． ＯＯＯ時間期待できる
ことがこれまでに分かつている・このような微小焦点Ｘ
線管は、特に乳癌の早期発見に有用であることも分かつ
ている。In the illustrated construction, the electron-emitting surface 11 of the dispenser cathode 10 is of diameter 1-2 as+. The pierced focusing electrode 14 is configured to reduce the diameter of the electron beam by approximately one-half. The electrode 15 is 0.8 to 1.
22 It is placed in front of the cod, preferably in front of the 1.9 sieve, and has a slip of 200 to 1.50 to control the electron beam current.
It is configured so that a potential of 0 volts is applied. Electrode 1
6 is placed in front of the electrode 15 by 1.6 to 2.4-1, preferably 2.0, and is configured to apply a potential of 800 to 1.500 volts to prevent electrons passing through the opening. Gives a focusing effect to the beam. The flat portion 17a of the electrode 17 is disposed 1.6 to 2.4 an, preferably 2.0 an, in front of the electrode 16, and is 1,000 to 5 an,
000 volts to provide further focusing to the electron beam, the diameter of the electron beam is ultimately determined by the electron emitting surface 1 of the dispenser cathode 10.
1 to 1/16 or less of its original diameter when released. Anode/cathode voltage is from 5kV to 10
It can vary up to 0kV. Also, the electron current is 2mA to 20m
In such an X-ray tube, the electron beam brightness (Bl is 1100k/sn2 and can vary from 40 microns to 1,
It is possible to create a spot with a size between 500 microns and an operating time of 1. It has been known so far that OOO time can be expected ・Such a minute focus
Ray tubes have also been found to be particularly useful in the early detection of breast cancer.
以上、本発明を１つの好適実施態様に関連して説明して
来たが、この他多くの変更ができるし用途も数多くある
ことは理解されるであろう。例を挙げると、ピアス型集
束電極１４の角度を変えて、例えば特定の用途に適する
ようにその集束作用を強めることなどもできる。さらに
電圧の作用範囲についても、管の大きさを変えることに
よって拡大することができる。Although the invention has been described in connection with one preferred embodiment, it will be appreciated that it is susceptible to many variations and applications. For example, the angle of the pierced focusing electrode 14 may be varied to enhance its focusing action, for example, to suit a particular application. Furthermore, the range of voltage action can be expanded by changing the size of the tube.
本発明のその他多くの変形例、修正例、および用途は明
らかであろう。Many other variations, modifications, and applications of the invention will be apparent.
第１図は本発明に従って構成された微小焦点Ｘ線管の１
つの形式を示す長手方向の断面図、第２図は、第１図の
Ｘ線管の電子銃を示す拡大図である０
２・・・真空エンベロープ、３・・・電子銃アセンブリ
、４・・・標的陽極、５・・・窓、１０・・・デイスペ
ンサ陰極、１１・・・電子放出面、１２・・・ヒータフ
ィラメント、１４・・・ピアス銃型開口電極、１５〜１
７・・・開口電極、２１．２２・・・熱遮蔽。FIG. 1 shows one of the microfocus X-ray tubes constructed according to the present invention.
FIG. 2 is an enlarged view of the electron gun of the X-ray tube of FIG.・Target anode, 5... Window, 10... Dispenser cathode, 11... Electron emission surface, 12... Heater filament, 14... Pierce gun type opening electrode, 15-1
7... Opening electrode, 21.22... Heat shield.
Claims (11)
電子ビームを発生させる陰極、該エンベロープ内にあっ
て電子ビームが衝突し内部の窓を通して該エンベロープ
の外部に放出されるＸ線を発生させる標的陽極、および
上記電子ビームを該標的陽極に衝突する前に制御するべ
く該陰極と標的陽極との間にある電極システムより成る
微小焦点式Ｘ線管であって、前記陰極は電流密度が高く
均等であり輝度の高い電子ビームを放出する電子放出面
を有するピアス銃型式のディスペンサ陰極であり、前記
電極システムが、前記ディスペンサ陰極を取囲みかつ電
子ビームを初期的に集束するビーム集束構造を有するピ
アス銃型式の第１開口電極と、第１電極の前方に間隔を
あけて配置されかつ電子ビームの電流を制御するための
電位がかかるように構成された第２開口電極と、前記第
２電極の前方に配置されて電子ビームが前記標的陽極に
衝突する前にさらに電子ビームを集束するさらに別の電
極手段とを含んでいることを特徴とするＸ線管。(1) a vacuum envelope, a cathode located within the envelope to generate an electron beam, and a target anode located within the envelope to generate X-rays upon which the electron beam strikes and is emitted to the outside of the envelope through an internal window; and a microfocusing x-ray tube comprising an electrode system between the cathode and the target anode for controlling the electron beam before impinging on the target anode, the cathode having a high and uniform current density. A pierce gun type dispenser cathode having an electron emitting surface that emits a high brightness electron beam, the electrode system having a beam focusing structure surrounding the dispenser cathode and initially focusing the electron beam. a first aperture electrode, a second aperture electrode arranged at a distance in front of the first electrode and configured to be applied with a potential for controlling the current of the electron beam; and a second aperture electrode in front of the second electrode. further electrode means arranged to further focus the electron beam before it impinges on the target anode.
隔をあけて配置されかつ電子ビームをさらに集束するた
めの電位がかかるように構成された第３開口電極を含む
ことを特徴とする、特許請求の範囲第１項に記載のＸ線
管。(2) The further electrode means includes a third aperture electrode arranged at a distance in front of the second electrode and configured to be applied with a potential for further focusing the electron beam. The X-ray tube according to claim 1.
と、前記平面部分の前方にあって前記電子ビームをさら
に集束するビーム集束部分とを含んでいることを特徴と
する、特許請求の範囲第２項に記載のＸ線管。(3) The third electrode includes a flat portion facing the second electrode, and a beam focusing portion that is located in front of the flat portion and further focuses the electron beam. The X-ray tube according to scope 2.
０．８〜１．２ｍｍ距離をあけて配置されることを特徴
とする、特許請求の範囲第１〜３項の何れかに記載のＸ
線管。(4) Any one of claims 1 to 3, wherein the second electrode is flat and arranged in front of the first electrode with a distance of 0.8 to 1.2 mm. X written in crab
wire tube.
距離をあけて配置されていることを特徴とする、特許請
求の範囲第４項に記載のＸ線管。(5) The second electrode is 1.0 mm in front of the first electrode.
The X-ray tube according to claim 4, characterized in that the X-ray tubes are arranged at a distance.
方に１．６〜２．４ｍｍ距離をあけて配置されているこ
とを特徴とする、特許請求の範囲第２項または第３項に
記載のＸ線管。(6) Claim 2 or 3, wherein the third electrode has a flat shape and is arranged in front of the second electrode at a distance of 1.6 to 2.4 mm. The X-ray tube according to item 3.
距離をあけて配置されていることを特徴とする、特許請
求の範囲第６項に記載のＸ線管。(7) The third electrode is 2.0 mm in front of the second electrode.
The X-ray tube according to claim 6, characterized in that the X-ray tubes are arranged at a distance.
直径が１〜２ｍｍであることを特徴とする、特許請求の
範囲第１〜７項の何れかに記載のＸ線管。(8) The X-ray tube according to any one of claims 1 to 7, wherein the dispenser cathode is circular and has a diameter of 1 to 2 mm.
ことを特徴とする、特許請求の範囲第８項に記載のＸ線
管。(9) The X-ray tube according to claim 8, wherein the dispenser cathode has a diameter of 1.5 mm.
ータフィラメントにより間接的に加熱され、端部壁が前
記電子放出面を形成していることを特徴とする、特許請
求の範囲第１〜９項の何れかに記載のＸ線管。(10) The dispenser cathode is indirectly heated by a heater filament disposed therein, and the end wall forms the electron emitting surface. The X-ray tube according to any one of.
に含むことを特徴とする、特許請求の範囲第９項に記載
のＸ線管。(11) The X-ray tube according to claim 9, further comprising a heat shield surrounding the heater filament.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL71676 | 1984-04-27 | ||
| IL71676A IL71676A0 (en) | 1984-04-27 | 1984-04-27 | X-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6122545A true JPS6122545A (en) | 1986-01-31 |
Family
ID=11055017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60089877A Pending JPS6122545A (en) | 1984-04-27 | 1985-04-25 | X-ray tube |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS6122545A (en) |
| DE (2) | DE8512064U1 (en) |
| IL (1) | IL71676A0 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5688631A (en) * | 1979-12-21 | 1981-07-18 | Sanyo Electric Co | Battery charger |
| US5563923A (en) * | 1994-04-26 | 1996-10-08 | Hamamatsu Photonics K. K. | X-ray tube |
| JP2003510762A (en) * | 1999-09-21 | 2003-03-18 | イマトロン・インコーポレーテッド | Apparatus for erasing ions in a computed tomography system |
| JP2005038825A (en) * | 2003-06-26 | 2005-02-10 | Hitachi Medical Corp | Microfocus x-ray tube and x-ray apparatus using the same |
| US7058161B2 (en) | 2001-10-19 | 2006-06-06 | Hamamatsu Photonics K.K. | X-ray tube and method of producing the same |
| JP2006286264A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Medical Corp | Microfocus x-ray tube |
| JP2007066694A (en) * | 2005-08-31 | 2007-03-15 | Hamamatsu Photonics Kk | X-ray tube |
| US10825638B2 (en) | 2018-04-12 | 2020-11-03 | Hamamatsu Photonics K.K. | X-ray tube |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4026300A1 (en) * | 1990-08-20 | 1992-02-27 | Siemens Ag | Electron emitter for X=ray tube - is of material contg. rare earth element covering support layer of large flat surface withstanding vibration |
| DE4430622C2 (en) * | 1994-08-29 | 1998-07-02 | Siemens Ag | Cathode system for an X-ray tube |
| CN102224560B (en) | 2008-11-26 | 2015-08-05 | 皇家飞利浦电子股份有限公司 | For the auxiliary grid electrode of X-ray tube |
| DE102009038687B4 (en) * | 2009-08-24 | 2015-10-15 | Siemens Aktiengesellschaft | Device and method for controlling an electron beam in an X-ray tube |
-
1984
- 1984-04-27 IL IL71676A patent/IL71676A0/en unknown
-
1985
- 1985-04-24 DE DE8512064U patent/DE8512064U1/en not_active Expired
- 1985-04-24 DE DE19853514700 patent/DE3514700A1/en not_active Withdrawn
- 1985-04-25 JP JP60089877A patent/JPS6122545A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5688631A (en) * | 1979-12-21 | 1981-07-18 | Sanyo Electric Co | Battery charger |
| US5563923A (en) * | 1994-04-26 | 1996-10-08 | Hamamatsu Photonics K. K. | X-ray tube |
| JP2003510762A (en) * | 1999-09-21 | 2003-03-18 | イマトロン・インコーポレーテッド | Apparatus for erasing ions in a computed tomography system |
| US7058161B2 (en) | 2001-10-19 | 2006-06-06 | Hamamatsu Photonics K.K. | X-ray tube and method of producing the same |
| JP2005038825A (en) * | 2003-06-26 | 2005-02-10 | Hitachi Medical Corp | Microfocus x-ray tube and x-ray apparatus using the same |
| JP2006286264A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Medical Corp | Microfocus x-ray tube |
| JP2007066694A (en) * | 2005-08-31 | 2007-03-15 | Hamamatsu Photonics Kk | X-ray tube |
| US10825638B2 (en) | 2018-04-12 | 2020-11-03 | Hamamatsu Photonics K.K. | X-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8512064U1 (en) | 1985-08-22 |
| IL71676A0 (en) | 1984-12-31 |
| DE3514700A1 (en) | 1985-10-31 |
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