EP0173047A3 - X-ray tube - Google Patents

X-ray tube Download PDF

Info

Publication number
EP0173047A3
EP0173047A3 EP85108795A EP85108795A EP0173047A3 EP 0173047 A3 EP0173047 A3 EP 0173047A3 EP 85108795 A EP85108795 A EP 85108795A EP 85108795 A EP85108795 A EP 85108795A EP 0173047 A3 EP0173047 A3 EP 0173047A3
Authority
EP
European Patent Office
Prior art keywords
electron beam
target
macro
exit window
focal spot
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.)
Withdrawn
Application number
EP85108795A
Other languages
German (de)
French (fr)
Other versions
EP0173047A2 (en
Inventor
Helge Carlsen
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.)
Scanray AS
Original Assignee
Scanray 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
Application filed by Scanray AS filed Critical Scanray AS
Publication of EP0173047A2 publication Critical patent/EP0173047A2/en
Publication of EP0173047A3 publication Critical patent/EP0173047A3/en
Withdrawn legal-status Critical Current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
    • 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
    • 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

Landscapes

  • X-Ray Techniques (AREA)

Abstract

Eine Röntgenröhre weist eine Kathode, ein Gitter, eine Lochanode und ein hinter der Lochanode angeordnetes Target mit seitlichem Austrittsfenster für die Röntgenstrah­ lung auf. Außerdem sind zwei jeweils an eine Wechselspan­ nungsquelle angeschlossene Ablenkspulen zur seitlichen Ablenkung des Elektronenstrahls in zwei Ebenen vorgese­ hen. Die Ausgangsspannungen oder Ausgangsströme der Wechselspannungsquelle sind nach Verlauf und Frequenz so bemessen, daß der Auftreffpunkt des Elektronenstrahls auf dem Target wie der Elektronenstrahl einer Fernsehbild­ röhre eng benachbarte Bahnen durchläuft und damit eine Fläche auf dem Target überstreicht, die als Makrobrenn­ fleck dem Austrittsfenster zugewandt ist. Durch Bildung eines solchen Makrobrennflecks mittels Ablenkung eines Mikrobrennflecks wird eine gleichmäßige Intensitätsvertei­ lung über die gesamte Ausdehnung des Makrobrennflecks erreicht. An x-ray tube has a cathode, a grid, one Hole anode and one located behind the hole anode Target with side exit window for the X-ray lung on. In addition, two are each on an alternating chip deflection coils connected to the source Deflection of the electron beam in two planes hen. The output voltages or output currents of the AC voltage sources are based on course and frequency dimensioned so that the point of impact of the electron beam on the target like the electron beam of a television picture tube passes through closely adjacent paths and thus a Covered area on the target that acts as a macro burn stain is facing the exit window. Through education of such a macro focal spot by deflecting one Micro focal spots become an even intensity distribution the entire extent of the macro focal spot reached.

EP85108795A 1984-08-27 1985-07-13 X-ray tube Withdrawn EP0173047A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843431434 DE3431434A1 (en) 1984-08-27 1984-08-27 X-RAY TUBES
DE3431434 1984-08-27

Publications (2)

Publication Number Publication Date
EP0173047A2 EP0173047A2 (en) 1986-03-05
EP0173047A3 true EP0173047A3 (en) 1988-03-16

Family

ID=6243978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108795A Withdrawn EP0173047A3 (en) 1984-08-27 1985-07-13 X-ray tube

Country Status (3)

Country Link
EP (1) EP0173047A3 (en)
DE (1) DE3431434A1 (en)
DK (1) DK368685A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125926C1 (en) * 1991-08-05 1992-08-27 Siemens Ag, 8000 Muenchen, De X=ray tube for computer tomography - has vacuum housing with anode and cathode to emit and focus electron beam
US7106830B2 (en) 2002-06-12 2006-09-12 Agilent Technologies, Inc. 3D x-ray system adapted for high speed scanning of large articles
US20240130028A1 (en) * 2022-10-18 2024-04-18 Carl Zeiss X-ray Microscopy, Inc. Reflection target X-ray source with steered beam on target

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176137A (en) * 1961-10-31 1965-03-30 Licentia Gmbh Crt x-ray generator with beam velocity modulation for equalizing radiation
US3852605A (en) * 1972-12-27 1974-12-03 Jeol Ltd Control circuitry for preventing damage to the target of a scanning x-ray generator
DE2813657A1 (en) * 1978-03-30 1979-10-04 Bahram Dr Med Bahrami X=ray appts. with highly collimated electron beam - swept in lines across anode to increase power and picture contrast
DE3222515A1 (en) * 1982-06-16 1984-03-22 Feinfocus Röntgensysteme GmbH, 3050 Wunstorf Fine focus X-ray tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176137A (en) * 1961-10-31 1965-03-30 Licentia Gmbh Crt x-ray generator with beam velocity modulation for equalizing radiation
US3852605A (en) * 1972-12-27 1974-12-03 Jeol Ltd Control circuitry for preventing damage to the target of a scanning x-ray generator
DE2813657A1 (en) * 1978-03-30 1979-10-04 Bahram Dr Med Bahrami X=ray appts. with highly collimated electron beam - swept in lines across anode to increase power and picture contrast
DE3222515A1 (en) * 1982-06-16 1984-03-22 Feinfocus Röntgensysteme GmbH, 3050 Wunstorf Fine focus X-ray tube

Also Published As

Publication number Publication date
DK368685D0 (en) 1985-08-14
DK368685A (en) 1986-02-28
EP0173047A2 (en) 1986-03-05
DE3431434A1 (en) 1986-03-06

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Legal Events

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Inventor name: CARLSEN, HELGE