EP0590418B1 - Hochspannungsröhre - Google Patents

Hochspannungsröhre Download PDF

Info

Publication number
EP0590418B1
EP0590418B1 EP93114887A EP93114887A EP0590418B1 EP 0590418 B1 EP0590418 B1 EP 0590418B1 EP 93114887 A EP93114887 A EP 93114887A EP 93114887 A EP93114887 A EP 93114887A EP 0590418 B1 EP0590418 B1 EP 0590418B1
Authority
EP
European Patent Office
Prior art keywords
voltage tube
tube according
vacuum
annular part
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.)
Expired - Lifetime
Application number
EP93114887A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0590418A1 (de
Inventor
Christian Dr.-Ing. Schenk
Jens Ulrik Madsen
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.)
Thales Electron Devices GmbH
Andrex Radiation Products AS
Original Assignee
Licentia Patent Verwaltungs GmbH
Andrex Radiation Products AS
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
Priority claimed from DE4241572A external-priority patent/DE4241572A1/de
Application filed by Licentia Patent Verwaltungs GmbH, Andrex Radiation Products AS filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0590418A1 publication Critical patent/EP0590418A1/de
Application granted granted Critical
Publication of EP0590418B1 publication Critical patent/EP0590418B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/16—Vessels; Containers; Shields associated therewith
    • H01J35/165—Vessels; Containers; Shields associated therewith joining connectors to the tube

Definitions

  • the present invention relates to a high-voltage tube according to the preamble of claim 1.
  • it relates to an X-ray tube.
  • Such an x-ray tube is e.g. from DE-PS 24 48 497 and the AEG telephony publication "X-ray tubes in metal-ceramic technology" June 1983, Figure 3 known.
  • the aim of such tubes is to further improve the high voltage strength and to build the tubes smaller and to be able to operate them at higher voltages.
  • the present invention has for its object to further increase the high voltage strength in a tube mentioned above.
  • the inserted metallic tube section causes a homogenization of the electrical field profile and reduces the risk that irregular and increased field strength loads occur in the fastening area of the electrode bushing on the inner circumference of the opening of the ring-shaped insulator, which can lead to high voltage breakdowns.
  • FIG. 1 shows schematically in cross section the cathode end of an X-ray tube.
  • the vacuum housing is formed by the essentially cylindrical outer jacket 2 made of metal, the disk-shaped insulator 3 made of ceramic and the bushing 1 arranged in the central opening of the insulator 3, which is tubular and carries the cathode 8 on the vacuum side.
  • the metal-ceramic connections are designed to be vacuum-tight and, for example, designed as soldered connections.
  • the metal outer jacket 2 is at ground potential and the cathode bushing 1 is at a strong negative potential of, for example, -300 to -450 kilovolts.
  • an Extension 5 may be arranged, which has a shielding effect against secondary electrons.
  • the cathode coil located in the vacuum space 7 is designated by 8.
  • the tube is essentially rotationally symmetrical with respect to the longitudinal axis 9 of the tube.
  • this insulating disk 3 is divided into two ring parts 31 and 32 arranged concentrically to one another and a metallic tube section 4 is interposed.
  • the connections between this pipe section 4 and the ceramic ring parts 31 and 32 are vacuum-tight, in particular soldered connections.
  • the pipe section preferably has an approximately funnel-shaped extension 6 which projects into the vacuum space 7 and which has shielding effects and influences which influence the electrical field.
  • the tube section 4 can furthermore be expedient to apply an externally supplied potential to this tube section 4, which is readily possible in the exemplary embodiment shown since the tube section 4 soldered in a vacuum-tight manner can be contacted from the outside. It is with an appropriate choice the magnitude of the applied voltage, which must have a value between the voltage on the outer jacket 2 and the cathode bushing 1, makes it possible to reduce the electric field strength in the critical region of the bushing 1.
  • the voltage applied to the pipe section 4 can be, for example, -200KV if a voltage of -400 KV compared to the ground potential OV is applied to the outer jacket of the bushing 1.
  • the field strength in the particularly critical area in which the bushing 1 is passed through the ceramic disk 3 can be reduced by up to approximately 30%.
  • the tube section 4 can also consist only of a solder metal layer with which the concentric ring parts 31 and 32 are connected to one another in a vacuum-tight manner.
  • FIGS. 2 and 3 show further preferred exemplary embodiments of the invention, the same numbers being used for the same.
  • the ring parts 31 and 32 made of insulating material overlap in the radial direction, ie the inner diameter of the outer ring part 32 is smaller than the outer diameter of the inner ring part 31.
  • the ring parts 31 and 32 are in the direction of the tube longitudinal axis 9 staggered.
  • the inner ring part 31 is arranged closer to the cathode 8.
  • FIG. 3 shows an exemplary embodiment in which the outer ring part 32 is arranged closer to the cathode 8.
  • the pipe section 4 each has a shoulder that changes its diameter.
  • the potential of the metallic pipe section 4 is expediently to be selected with regard to the maximum field strength that occurs on the outer insulating ring part, that is on the outer surface of the interposed metallic pipe section 4.
  • the section of the cathode side is one X-ray tube constructed essentially rotationally symmetrical to the longitudinal axis 9 of the tube.

Landscapes

  • X-Ray Techniques (AREA)
EP93114887A 1992-10-02 1993-09-16 Hochspannungsröhre Expired - Lifetime EP0590418B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4233206 1992-10-02
DE4233206 1992-10-02
DE4241572 1992-12-10
DE4241572A DE4241572A1 (de) 1992-10-02 1992-12-10 Hochspannungsröhre

Publications (2)

Publication Number Publication Date
EP0590418A1 EP0590418A1 (de) 1994-04-06
EP0590418B1 true EP0590418B1 (de) 1996-08-14

Family

ID=25919135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114887A Expired - Lifetime EP0590418B1 (de) 1992-10-02 1993-09-16 Hochspannungsröhre

Country Status (3)

Country Link
US (1) US5402464A (ja)
EP (1) EP0590418B1 (ja)
JP (1) JP3592352B2 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898754A (en) * 1997-06-13 1999-04-27 X-Ray And Specialty Instruments, Inc. Method and apparatus for making a demountable x-ray tube
WO2004023513A1 (de) * 2002-09-09 2004-03-18 Comet Holding Ag Hochspannungs-vakuumröhre
US6984102B2 (en) * 2003-11-19 2006-01-10 General Electric Company Hot gas path component with mesh and turbulated cooling
US7186084B2 (en) * 2003-11-19 2007-03-06 General Electric Company Hot gas path component with mesh and dimpled cooling
US6901136B1 (en) * 2003-12-02 2005-05-31 Ge Medical Systems Global Technology Co., Llc X-ray tube system and apparatus with conductive proximity between cathode and electromagnetic shield
JP2007066694A (ja) * 2005-08-31 2007-03-15 Hamamatsu Photonics Kk Ｘ線管
US7702077B2 (en) * 2008-05-19 2010-04-20 General Electric Company Apparatus for a compact HV insulator for x-ray and vacuum tube and method of assembling same
JP2016186880A (ja) * 2015-03-27 2016-10-27 東芝電子管デバイス株式会社 Ｘ線管
CN104889519B (zh) * 2015-04-24 2016-04-13 黄石上方检测设备有限公司 一种金属陶瓷x射线管的制造方法
CN111554556B (zh) * 2020-05-18 2023-06-27 上海联影医疗科技股份有限公司 X射线管及医疗成像设备

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL22932C (ja) * 1926-03-04
US2202687A (en) * 1936-12-16 1940-05-28 Philips Nv High-voltage discharge tube
US2238319A (en) * 1940-07-12 1941-04-15 Picker X Ray Corp Cable contact
DE1866378U (de) * 1962-04-04 1963-01-31 Philips Nv Roentgenroehre mit von einer metallwand umgebenem entladungsraum.
GB1458027A (en) * 1973-01-08 1976-12-08 Philips Electronic Associated Electric discharge vacuum tube
DE2448497C3 (de) * 1974-10-11 1986-02-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Röntgenstrahler mit einer ein evakuiertes zylindrisches Metallteil aufweisenden Röntgenröhre und mit wenigstens einem Anschlußteil
DE2506841C2 (de) * 1975-02-18 1986-07-03 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochspannungs-Vakuumröhre
FR2399124A1 (fr) * 1977-07-29 1979-02-23 Radiologie Cie Gle Tube a rayons x a anode tournante
DE3116169A1 (de) * 1981-04-23 1982-11-11 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochspannungs-vakuumroehre, insbesondere roentgenroehre
DE3142281A1 (de) * 1981-10-24 1983-05-05 Philips Patentverwaltung Gmbh, 2000 Hamburg Roentgenroehre mit einem metallteil und einer gegenueber dem metallteil positive hochspannung fuehrenden elektrode

Also Published As

Publication number Publication date
US5402464A (en) 1995-03-28
JP3592352B2 (ja) 2004-11-24
JPH06318440A (ja) 1994-11-15
EP0590418A1 (de) 1994-04-06

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