JPS62135347U - - Google Patents
Info
- Publication number
- JPS62135347U JPS62135347U JP1987021255U JP2125587U JPS62135347U JP S62135347 U JPS62135347 U JP S62135347U JP 1987021255 U JP1987021255 U JP 1987021255U JP 2125587 U JP2125587 U JP 2125587U JP S62135347 U JPS62135347 U JP S62135347U
- Authority
- JP
- Japan
- Prior art keywords
- tungsten
- hot cathode
- layers
- layer
- band
- 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
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims 6
- 229910052721 tungsten Inorganic materials 0.000 claims 6
- 239000010937 tungsten Substances 0.000 claims 6
- 229910052715 tantalum Inorganic materials 0.000 claims 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims 2
- 239000013078 crystal Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
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
Description
第１図はこの考案に基づくＸ線管の一実施例の
断面を含む正面図、第２図及び第３図はそれぞれ
第１図に示す帯状エミツタの異なる実施例の斜視
図、第４図は帯状エミツタの一実施例の部分断面
図である。
７……帯状エミツタ、２０ないし２２……層。
FIG. 1 is a front view including a cross section of an embodiment of the X-ray tube based on this invention, FIGS. 2 and 3 are perspective views of different embodiments of the band-shaped emitter shown in FIG. 1, and FIG. FIG. 3 is a partial cross-sectional view of an embodiment of a band-shaped emitter. 7... band-shaped emitters, 20 to 22... layers.
Claims (1)
ツトを備え、電子放出能力を有する難溶融性材料
から成る帯状エミツタを有するＸ線管の熱陰極に
おいて、帯状エミツタ７が少なくとも二つの層（
２０ないし２２）から構成されていることを特徴
とするＸ線管の熱陰極。 (2) 一つの層２０がタングステンから成り、少
なくとも一つの別の層２１，２２がタンタルから
成ることを特徴とする実用新案登録請求の範囲第
１項記載の熱陰極。 (3) 帯状エミツタ７が三つの層（２０ないし２
２）を有し、その際中央の層２０がタングステン
から成り、外側の両層２１，２２がタンタルから
成ることを特徴とする実用新案登録請求の範囲第
２項記載の熱陰極。 (4) 帯状エミツタ７の層（２０ないし２２）が
同一材料の異なる結晶構造から成ることを特徴と
する実用新案登録請求の範囲第１項記載の熱陰極
。 (5) 一つの層２０が通常の構造のタングステン
から成り、少なくとも一つの別の層２１，２２が
多結晶のタングステンから成ることを特徴とする
実用新案登録請求の範囲第４項記載の熱陰極。 (6) 帯状エミツタ７が三つの層（２０ないし２
２）を有し、その際中央の層が通常の構造のタン
グステンから成り、外側の両層２１，２２が多結
晶のタングステンから成ることを特徴とする実用
新案登録請求の範囲第５項記載の熱陰極。 (7) 中央の層２０が外側の両層２１，２２に比
べて厚いことを特徴とする実用新案登録請求の範
囲第３項ないし第６項のいずれか１項に記載の熱
陰極。[Claims for Utility Model Registration] (1) In a hot cathode of an has at least two layers (
20 to 22). (2) The hot cathode according to claim 1, characterized in that one layer 20 is made of tungsten and at least one other layer 21, 22 is made of tantalum. (3) The band-shaped emitters 7 are arranged in three layers (20 to 2
2), in which the central layer 20 consists of tungsten and the two outer layers 21, 22 consist of tantalum. (4) The hot cathode according to claim 1, wherein the layers (20 to 22) of the band-shaped emitter 7 are made of the same material with different crystal structures. (5) The hot cathode according to claim 4, wherein one layer 20 is made of tungsten with a normal structure, and at least one other layer 21, 22 is made of polycrystalline tungsten. . (6) The band-shaped emitters 7 are arranged in three layers (20 to 2
2), in which the central layer is made of tungsten with a conventional structure, and both outer layers 21, 22 are made of polycrystalline tungsten, according to claim 5. Hot cathode. (7) The hot cathode according to any one of claims 3 to 6, wherein the central layer 20 is thicker than the outer layers 21 and 22.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3605540 | 1986-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62135347U true JPS62135347U (en) | 1987-08-26 |
Family
ID=6294587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987021255U Pending JPS62135347U (en) | 1986-02-21 | 1987-02-16 |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0235619B1 (en) |
| JP (1) | JPS62135347U (en) |
| DE (1) | DE3760462D1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005174939A (en) * | 2003-12-12 | 2005-06-30 | Ge Medical Systems Global Technology Co Llc | Method for manufacturing x-ray tube cathode filament, and x-ray tube |
| JP2009536777A (en) * | 2006-05-11 | 2009-10-15 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Emitter design including emergency operation mode in case of emitter damage for medical X-ray irradiation |
| JP2010534396A (en) * | 2007-07-24 | 2010-11-04 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Thermionic electron emitter, method of making a thermionic electron emitter, and x-ray source including a thermionic electron emitter |
| JP2011159623A (en) * | 2010-02-02 | 2011-08-18 | General Electric Co <Ge> | X-ray cathode and method for manufacturing the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6259193B1 (en) | 1998-06-08 | 2001-07-10 | General Electric Company | Emissive filament and support structure |
| DE102014211688A1 (en) | 2014-06-18 | 2015-12-24 | Siemens Aktiengesellschaft | flat emitter |
| DE102015215690A1 (en) | 2015-08-18 | 2017-03-09 | Siemens Healthcare Gmbh | emitter array |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2256297A (en) * | 1939-08-31 | 1941-09-16 | Rca Corp | Electron discharge device |
| GB1011398A (en) * | 1963-01-22 | 1965-11-24 | M O Valve Co Ltd | Improvements in or relating to thermionic cathodes |
| NL7314131A (en) * | 1973-10-15 | 1975-04-17 | Philips Nv | TURN IOOD ROENTGEN TUBE. |
| DE2727907A1 (en) * | 1977-06-21 | 1979-01-18 | Siemens Ag | X-ray tube glow cathode |
| JPS5568056A (en) * | 1978-11-17 | 1980-05-22 | Hitachi Ltd | X-ray tube |
-
1987
- 1987-02-09 DE DE8787101758T patent/DE3760462D1/en not_active Expired
- 1987-02-09 EP EP87101758A patent/EP0235619B1/en not_active Expired
- 1987-02-16 JP JP1987021255U patent/JPS62135347U/ja active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005174939A (en) * | 2003-12-12 | 2005-06-30 | Ge Medical Systems Global Technology Co Llc | Method for manufacturing x-ray tube cathode filament, and x-ray tube |
| JP4582517B2 (en) * | 2003-12-12 | 2010-11-17 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | X-ray tube cathode filament manufacturing method and X-ray tube |
| JP2009536777A (en) * | 2006-05-11 | 2009-10-15 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Emitter design including emergency operation mode in case of emitter damage for medical X-ray irradiation |
| JP2010534396A (en) * | 2007-07-24 | 2010-11-04 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Thermionic electron emitter, method of making a thermionic electron emitter, and x-ray source including a thermionic electron emitter |
| JP2011159623A (en) * | 2010-02-02 | 2011-08-18 | General Electric Co <Ge> | X-ray cathode and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0235619B1 (en) | 1989-08-16 |
| DE3760462D1 (en) | 1989-09-21 |
| EP0235619A1 (en) | 1987-09-09 |