FR2395595A1 - X=Ray tube with heated cathode elements as emitter - applies voltage across ends with cut=out of different depths in strip - Google Patents

X=Ray tube with heated cathode elements as emitter - applies voltage across ends with cut=out of different depths in strip

Info

Publication number
FR2395595A1
FR2395595A1 FR7818098A FR7818098A FR2395595A1 FR 2395595 A1 FR2395595 A1 FR 2395595A1 FR 7818098 A FR7818098 A FR 7818098A FR 7818098 A FR7818098 A FR 7818098A FR 2395595 A1 FR2395595 A1 FR 2395595A1
Authority
FR
France
Prior art keywords
strip
emitter
ray tube
different depths
cut
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.)
Granted
Application number
FR7818098A
Other languages
French (fr)
Other versions
FR2395595B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2395595A1 publication Critical patent/FR2395595A1/en
Application granted granted Critical
Publication of FR2395595B1 publication Critical patent/FR2395595B1/fr
Granted legal-status Critical Current

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

Landscapes

  • X-Ray Techniques (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

A heated cathode is for an X-ray tube which uses an electrically heated element as the electron emitter. The heating current terminals are connected to a metal strip with a high melting point and which can emit electrons. The anode (9) is of the rotary type. The heating voltage is applied across the ends (10, 11) of the heated emitter. There are cutouts on opposite sides of the heating strip. The cutouts are at different distances from each other, of different depths and of different lengths. Certain sections of the strip are of different electrical resistance because of the width and thickness.
FR7818098A 1977-06-21 1978-06-16 X=Ray tube with heated cathode elements as emitter - applies voltage across ends with cut=out of different depths in strip Granted FR2395595A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772727907 DE2727907A1 (en) 1977-06-21 1977-06-21 X-ray tube glow cathode

Publications (2)

Publication Number Publication Date
FR2395595A1 true FR2395595A1 (en) 1979-01-19
FR2395595B1 FR2395595B1 (en) 1982-03-19

Family

ID=6011984

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7818098A Granted FR2395595A1 (en) 1977-06-21 1978-06-16 X=Ray tube with heated cathode elements as emitter - applies voltage across ends with cut=out of different depths in strip

Country Status (2)

Country Link
DE (1) DE2727907A1 (en)
FR (1) FR2395595A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235619A1 (en) * 1986-02-21 1987-09-09 Siemens Aktiengesellschaft Glow cathode for an X-ray tube
US6259193B1 (en) 1998-06-08 2001-07-10 General Electric Company Emissive filament and support structure

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698835A (en) * 1984-05-31 1987-10-06 Kabushiki Kaisha Toshiba X-ray tube apparatus
DE4026301A1 (en) * 1990-08-20 1992-02-27 Siemens Ag ELECTRON EMITTER OF A X-RAY TUBE
US5511105A (en) * 1993-07-12 1996-04-23 Siemens Aktiengesellschaft X-ray tube with multiple differently sized focal spots and method for operating same
DE19510048C2 (en) * 1995-03-20 1998-05-14 Siemens Ag X-ray tube
EP0958844A3 (en) * 1998-05-15 2000-08-09 Siemens Aktiengesellschaft Magnetic stimulation device
DE19911081A1 (en) * 1999-03-12 2000-09-21 Siemens Ag X-ray tube, especially a rotating bulb tube for producing different selected focal spots, has a hybrid emitter with different concentric emitter surface regions operated individually or in groups
DE10016125A1 (en) 1999-04-29 2000-11-02 Siemens Ag Thermionic emitter, especially flat emitter for driving X-ray tubes
DE10004986A1 (en) * 2000-02-04 2001-08-02 Siemens Ag Thermionic emitter that prevents or limits negative effects of thermal stresses on emitter distortion - has emission surface carried by current-carrying emitter legs with length section(s) angled against expansion direction of emission surface under heating
DE10012203C1 (en) * 2000-03-13 2001-07-26 Siemens Ag Flat thermionic emitter that prevents adverse effects of thermal stresses on emitter distortion - has devices that compensate for deformations caused by heating emission surface and hold transition points between emitter and legs substantially stress-free
DE10029253C1 (en) * 2000-06-14 2001-10-25 Siemens Ag Directly heated thermionic surface emitter for X-ray tube has pattern of slits in emission surface for providing several meandering current paths
DE102006018633B4 (en) * 2006-04-21 2011-12-29 Siemens Ag Surface emitter and X-ray tube with surface emitter
ATE525740T1 (en) * 2006-05-11 2011-10-15 Koninkl Philips Electronics Nv EMITTER DESIGN THAT ALLOWS AN EMERGENCY OPERATION MODE IN CASE OF EMMITTER DAMAGE, FOR USE IN MEDICAL X-RAY TECHNOLOGY
CN101529549B (en) * 2006-10-17 2014-09-03 皇家飞利浦电子股份有限公司 Emitter for X-ray tubes and heating method therefore
DE102008011841B4 (en) 2008-02-29 2012-10-31 Siemens Aktiengesellschaft cathode
DE102008020165A1 (en) 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Cathode, has emitter made of material and emitting electrons thermally, and emission layer made of material and partially applied on emitter, where material of emission layer exhibits electron work function less than material of emitter
DE102008020187A1 (en) 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Cathode, has flat emitter emitting electrons, and emission layer with circular cross section arranged on emitter, where material of emission layer has lower emission function than that of material of emitter
DE102008020164A1 (en) 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Cathode with a flat emitter
DE102008020163A1 (en) 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Cathode has incandescent emitter made from material, which emits electrons thermally, where emission layer is applied partially or completely on incandescent emitter
DE102008026634B4 (en) 2008-06-04 2011-01-05 Siemens Aktiengesellschaft Field emission cathode and X-ray tube with a field emission cathode
DE102008026633A1 (en) 2008-06-04 2009-12-10 Siemens Aktiengesellschaft X-ray tube, has vacuum housing in which cathode arrangement and anode arrangement are arranged, and protective wall comprising opening and arranged between anode and cathode arrangements, where cathode arrangement includes cathode
DE102008029355B4 (en) 2008-06-20 2011-09-22 Siemens Aktiengesellschaft X-ray tube
US7924983B2 (en) 2008-06-30 2011-04-12 Varian Medical Systems, Inc. Thermionic emitter designed to control electron beam current profile in two dimensions
DE102008032995A1 (en) 2008-07-14 2010-01-21 Siemens Aktiengesellschaft X-ray tube, has vacuum housing in which cathode and anode are arranged, where housing has inner wall that partially exhibits inertization, anode partially exhibits inertization and inertization comprises barrier layers
DE102008046721B4 (en) 2008-09-11 2011-04-21 Siemens Aktiengesellschaft Cathode with a parallel flat emitter
DE102010020151A1 (en) * 2010-05-11 2011-11-17 Siemens Aktiengesellschaft Thermionic flat emitter and associated method for operating an X-ray tube
DE102010038904B4 (en) 2010-08-04 2012-09-20 Siemens Aktiengesellschaft cathode
DE102010039765B4 (en) 2010-08-25 2015-11-19 Siemens Aktiengesellschaft cathode
DE102011004372A1 (en) 2011-02-18 2011-11-17 Siemens Aktiengesellschaft Cathode for use as electron source in X-ray tube for e.g. diagnostic imaging, has emitter for emitting electrons on application of voltage from emitter surface, where emitter is kept at distance from cathode head by insulating element
DE102012205715A1 (en) 2012-04-05 2013-10-10 Siemens Aktiengesellschaft Electron emitter i.e. flat emitter, for use in X-ray tube for thermal emission of electrons, has flat, current-carrying conductor including V-shaped meander structure and formed by metal strips provided with V-shaped recesses
DE102012209089A1 (en) * 2012-05-30 2013-12-05 Siemens Aktiengesellschaft X-ray tube has electrically heated electron emitters whose emitter regions carries current having mutually different temperatures in rotational direction of rotary anode
CN104428865B (en) * 2012-07-02 2017-04-26 东芝电子管器件株式会社 X-ray tube
DE102014211688A1 (en) 2014-06-18 2015-12-24 Siemens Aktiengesellschaft flat emitter
DE102015211235B4 (en) 2015-06-18 2023-03-23 Siemens Healthcare Gmbh emitter
DE102015215690B4 (en) 2015-08-18 2024-10-31 Siemens Healthineers Ag emitter arrangement
EP3226277A1 (en) * 2016-03-31 2017-10-04 General Electric Company Angled flat emitter for high power cathode with electrostatic emission control
US10468222B2 (en) 2016-03-31 2019-11-05 General Electric Company Angled flat emitter for high power cathode with electrostatic emission control
DE102017202403B4 (en) 2017-02-15 2024-01-11 Siemens Healthcare Gmbh Thermionic emission device
US10636608B2 (en) * 2017-06-05 2020-04-28 General Electric Company Flat emitters with stress compensation features
DE202018001615U1 (en) 2018-03-27 2018-04-24 Siemens Healthcare Gmbh flat emitter
DE102019203630B3 (en) 2019-03-18 2020-04-02 Siemens Healthcare Gmbh Flat emitter
CN114078674A (en) * 2021-11-23 2022-02-22 武汉联影医疗科技有限公司 Electron emission element and X-ray tube

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE336781C (en) * 1919-07-16 1921-05-18 Siemens & Halske Akt Ges Glow cathode for x-ray tubes
FR671883A (en) * 1928-04-14 1929-12-19 Radiotecnica Improvements to chi-ray tubes to reduce the dimensions of the origin of chi-rays
DE566993C (en) * 1927-07-17 1932-12-24 Siemens Schuckertwerke Akt Ges Glow cathode for electron tubes
US2256297A (en) * 1939-08-31 1941-09-16 Rca Corp Electron discharge device
FR943875A (en) * 1947-03-06 1949-03-21 Radio Electr Soc Fr Cathodes for electronic discharge tubes
US2468736A (en) * 1946-06-13 1949-05-03 Raytheon Mfg Co Slotted cathode structure
FR978627A (en) * 1948-11-24 1951-04-16 Csf Directly heated cathodes for special high power electron tubes
FR58949E (en) * 1948-12-30 1954-04-22 Csf Directly heated cathodes for special high power electron tubes
GB1011398A (en) * 1963-01-22 1965-11-24 M O Valve Co Ltd Improvements in or relating to thermionic cathodes
DE1287699B (en) * 1969-01-23

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744452C (en) * 1940-03-29 1944-01-19 Aeg Immediately heated cathode, especially for high-performance tubes
DE2135326A1 (en) * 1971-07-15 1973-01-25 Philips Patentverwaltung ROENTINE PIPE

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287699B (en) * 1969-01-23
DE336781C (en) * 1919-07-16 1921-05-18 Siemens & Halske Akt Ges Glow cathode for x-ray tubes
DE566993C (en) * 1927-07-17 1932-12-24 Siemens Schuckertwerke Akt Ges Glow cathode for electron tubes
FR671883A (en) * 1928-04-14 1929-12-19 Radiotecnica Improvements to chi-ray tubes to reduce the dimensions of the origin of chi-rays
US2256297A (en) * 1939-08-31 1941-09-16 Rca Corp Electron discharge device
US2468736A (en) * 1946-06-13 1949-05-03 Raytheon Mfg Co Slotted cathode structure
FR943875A (en) * 1947-03-06 1949-03-21 Radio Electr Soc Fr Cathodes for electronic discharge tubes
FR978627A (en) * 1948-11-24 1951-04-16 Csf Directly heated cathodes for special high power electron tubes
FR58949E (en) * 1948-12-30 1954-04-22 Csf Directly heated cathodes for special high power electron tubes
GB1011398A (en) * 1963-01-22 1965-11-24 M O Valve Co Ltd Improvements in or relating to thermionic cathodes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235619A1 (en) * 1986-02-21 1987-09-09 Siemens Aktiengesellschaft Glow cathode for an X-ray tube
US6259193B1 (en) 1998-06-08 2001-07-10 General Electric Company Emissive filament and support structure
US6464551B1 (en) 1998-06-08 2002-10-15 General Electric Company Filament design, method, and support structure

Also Published As

Publication number Publication date
DE2727907A1 (en) 1979-01-18
FR2395595B1 (en) 1982-03-19
DE2727907C2 (en) 1987-11-05

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