NL1036209A1 - Filament assembly having reduced electron beam time constant. - Google Patents
Filament assembly having reduced electron beam time constant.Info
- Publication number
- NL1036209A1 NL1036209A1 NL1036209A NL1036209A NL1036209A1 NL 1036209 A1 NL1036209 A1 NL 1036209A1 NL 1036209 A NL1036209 A NL 1036209A NL 1036209 A NL1036209 A NL 1036209A NL 1036209 A1 NL1036209 A1 NL 1036209A1
- Authority
- NL
- Netherlands
- Prior art keywords
- electron beam
- time constant
- filament assembly
- beam time
- reduced electron
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/135—Circuit arrangements therefor, e.g. for temperature control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
-
- 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
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/28—Heaters for thermionic cathodes
- H01J2201/2803—Characterised by the shape or size
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/28—Heaters for thermionic cathodes
- H01J2201/2803—Characterised by the shape or size
- H01J2201/281—Cage-like construction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/28—Heaters for thermionic cathodes
- H01J2201/2803—Characterised by the shape or size
- H01J2201/2867—Spiral or helix
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/12—Cooling
- H01J2235/1212—Cooling of the cathode
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1038404A NL1038404C2 (en) | 2007-11-19 | 2010-11-10 | Filament assembly having reduced electron beam time constant. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US94265607 | 2007-11-19 | ||
US11/942,656 US7539286B1 (en) | 2007-11-19 | 2007-11-19 | Filament assembly having reduced electron beam time constant |
Publications (2)
Publication Number | Publication Date |
---|---|
NL1036209A1 true NL1036209A1 (nl) | 2009-05-20 |
NL1036209C2 NL1036209C2 (en) | 2010-11-18 |
Family
ID=40577345
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL1036209A NL1036209C2 (en) | 2007-11-19 | 2008-11-18 | Filament assembly having reduced electron beam time constant. |
NL1038404A NL1038404C2 (en) | 2007-11-19 | 2010-11-10 | Filament assembly having reduced electron beam time constant. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL1038404A NL1038404C2 (en) | 2007-11-19 | 2010-11-10 | Filament assembly having reduced electron beam time constant. |
Country Status (4)
Country | Link |
---|---|
US (1) | US7539286B1 (nl) |
JP (1) | JP4937987B2 (nl) |
DE (1) | DE102008058608B4 (nl) |
NL (2) | NL1036209C2 (nl) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7924983B2 (en) * | 2008-06-30 | 2011-04-12 | Varian Medical Systems, Inc. | Thermionic emitter designed to control electron beam current profile in two dimensions |
US8340250B2 (en) * | 2009-09-04 | 2012-12-25 | General Electric Company | System and method for generating X-rays |
US8385506B2 (en) * | 2010-02-02 | 2013-02-26 | General Electric Company | X-ray cathode and method of manufacture thereof |
CN102884606A (zh) * | 2010-04-09 | 2013-01-16 | Ge传感与检测技术有限公司 | 微焦x射线管的阴极元件 |
US8938050B2 (en) | 2010-04-14 | 2015-01-20 | General Electric Company | Low bias mA modulation for X-ray tubes |
JP6043476B2 (ja) * | 2011-10-12 | 2016-12-14 | 株式会社日立ハイテクノロジーズ | イオン源およびそれを用いたイオンビーム装置 |
US9514911B2 (en) | 2012-02-01 | 2016-12-06 | Varian Medical Systems, Inc. | X-ray tube aperture body with shielded vacuum wall |
US8831178B2 (en) * | 2012-07-03 | 2014-09-09 | General Electric Company | Apparatus and method of manufacturing a thermally stable cathode in an X-ray tube |
US9202663B2 (en) * | 2012-12-05 | 2015-12-01 | Shimadzu Corporation | Flat filament for an X-ray tube, and an X-ray tube |
KR20140112270A (ko) * | 2013-03-13 | 2014-09-23 | 삼성전자주식회사 | 방열 블록을 포함한 엑스선 발생 장치 |
US9775574B2 (en) | 2014-04-28 | 2017-10-03 | Moxtek, Inc. | XRF analyzer |
US9711320B2 (en) * | 2014-04-29 | 2017-07-18 | General Electric Company | Emitter devices for use in X-ray tubes |
US10109450B2 (en) * | 2016-03-18 | 2018-10-23 | Varex Imaging Corporation | X-ray tube with structurally supported planar emitter |
US20180211809A1 (en) * | 2017-01-26 | 2018-07-26 | Varex Imaging Corporation | Cathode head with multiple filaments for high emission focal spot |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL21136C (nl) * | 1925-11-02 | |||
US3737706A (en) * | 1969-04-29 | 1973-06-05 | Rca Corp | Numerical display device having filamentary light sources |
US4065689A (en) * | 1974-11-29 | 1977-12-27 | Picker Corporation | Dual filament X-ray tube |
US4823371A (en) * | 1987-08-24 | 1989-04-18 | Grady John K | X-ray tube system |
FR2687504B1 (fr) * | 1992-02-13 | 1994-04-08 | General Electric Cgr | Perfectionnements aux tubes a rayons x. |
US5303281A (en) * | 1992-07-09 | 1994-04-12 | Varian Associates, Inc. | Mammography method and improved mammography X-ray tube |
JPH10334839A (ja) * | 1997-05-29 | 1998-12-18 | Hitachi Medical Corp | X線管 |
CN1222010C (zh) * | 1998-03-16 | 2005-10-05 | 东芝株式会社 | X射线管 |
JPH11283543A (ja) * | 1998-03-31 | 1999-10-15 | Toshiba Electronic Engineering Corp | X線管の陰極構体 |
US6252937B1 (en) * | 1999-09-14 | 2001-06-26 | General Electric Company | High thermal performance cathode via heat pipes |
JP2004139790A (ja) * | 2002-10-16 | 2004-05-13 | Toshiba Corp | X線管装置 |
FR2855360B1 (fr) * | 2003-05-20 | 2006-10-27 | Ge Med Sys Global Tech Co Llc | Procede d'alimentation d'un filament de chauffage d'un tube a rayons x et tube a rayons x correspondant |
US7795792B2 (en) * | 2006-02-08 | 2010-09-14 | Varian Medical Systems, Inc. | Cathode structures for X-ray tubes |
-
2007
- 2007-11-19 US US11/942,656 patent/US7539286B1/en active Active
-
2008
- 2008-11-18 JP JP2008294759A patent/JP4937987B2/ja active Active
- 2008-11-18 NL NL1036209A patent/NL1036209C2/en active Search and Examination
- 2008-11-19 DE DE102008058608.0A patent/DE102008058608B4/de active Active
-
2010
- 2010-11-10 NL NL1038404A patent/NL1038404C2/en active
Also Published As
Publication number | Publication date |
---|---|
US7539286B1 (en) | 2009-05-26 |
DE102008058608A1 (de) | 2009-05-28 |
DE102008058608B4 (de) | 2014-07-17 |
JP2009129907A (ja) | 2009-06-11 |
NL1036209C2 (en) | 2010-11-18 |
NL1038404A (en) | 2010-12-30 |
JP4937987B2 (ja) | 2012-05-23 |
US20090129550A1 (en) | 2009-05-21 |
NL1038404C2 (en) | 2011-08-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AD1A | A request for search or an international type search has been filed | ||
PD | Change of ownership |
Owner name: VAREX IMAGING CORPORATION; US Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: VARIAN MEDICAL SYSTEMS, INC. Effective date: 20170928 |