ES477927A1 - X-ray tubes - Google Patents

X-ray tubes

Info

Publication number
ES477927A1
ES477927A1 ES477927A ES477927A ES477927A1 ES 477927 A1 ES477927 A1 ES 477927A1 ES 477927 A ES477927 A ES 477927A ES 477927 A ES477927 A ES 477927A ES 477927 A1 ES477927 A1 ES 477927A1
Authority
ES
Spain
Prior art keywords
cathode
additional electrode
grid
focal spot
voltage
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
Application number
ES477927A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES477927A1 publication Critical patent/ES477927A1/en
Expired 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
    • H01J35/045—Electrodes for controlling the current of the cathode ray, e.g. control grids
    • 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
    • H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
    • H01J35/26—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof by rotation of the anode or anticathode

Landscapes

  • X-Ray Techniques (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

In order to reduce stray radiation from an X-ray tube, a first additional electrode (6) is disposed near the anode focal spot (3a) on rotating anode 3 and is supplied with a voltage 3-10 kV higher than that of the cathode (5) so as to capture the majority of electrons reflected and generated by secondary emission at the focal spot (3a). A second additional electrode (8), to which a voltage positive with respect to the cathode (5) is applied, may be disposed between the cathode (5) and the first additional electrode (6) to increase the electric field strength in the region of the cathode heater and thereby compensate for space-charge effects due to the first additional electrode 6). Aperture (7a) may be dispensed with for low At. No. materials, and may produce a pre-filtering. The tube current may be switched by grid 9 or grid 8.
ES477927A 1978-02-23 1979-02-21 X-ray tubes Expired ES477927A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2807735A DE2807735B2 (en) 1978-02-23 1978-02-23 X-ray tube with a tubular piston made of metal

Publications (1)

Publication Number Publication Date
ES477927A1 true ES477927A1 (en) 1979-07-01

Family

ID=6032724

Family Applications (1)

Application Number Title Priority Date Filing Date
ES477927A Expired ES477927A1 (en) 1978-02-23 1979-02-21 X-ray tubes

Country Status (8)

Country Link
JP (1) JPS54123891A (en)
AU (1) AU4452879A (en)
BR (1) BR7901075A (en)
DE (1) DE2807735B2 (en)
ES (1) ES477927A1 (en)
FR (1) FR2418545A1 (en)
GB (1) GB2015245A (en)
IT (1) IT1112012B (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542438C1 (en) * 1995-11-14 1996-11-28 Siemens Ag X=ray tube with vacuum housing having cathode and anode
US8275091B2 (en) 2002-07-23 2012-09-25 Rapiscan Systems, Inc. Compact mobile cargo scanning system
US7963695B2 (en) 2002-07-23 2011-06-21 Rapiscan Systems, Inc. Rotatable boom cargo scanning system
GB0309387D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-Ray scanning
GB0309383D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-ray tube electron sources
US8451974B2 (en) 2003-04-25 2013-05-28 Rapiscan Systems, Inc. X-ray tomographic inspection system for the identification of specific target items
GB0309371D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-Ray tubes
GB0309379D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-ray scanning
GB0309374D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-ray sources
US8804899B2 (en) 2003-04-25 2014-08-12 Rapiscan Systems, Inc. Imaging, data acquisition, data transmission, and data distribution methods and systems for high data rate tomographic X-ray scanners
US8223919B2 (en) 2003-04-25 2012-07-17 Rapiscan Systems, Inc. X-ray tomographic inspection systems for the identification of specific target items
GB0812864D0 (en) 2008-07-15 2008-08-20 Cxr Ltd Coolign anode
US7949101B2 (en) 2005-12-16 2011-05-24 Rapiscan Systems, Inc. X-ray scanners and X-ray sources therefor
US8243876B2 (en) 2003-04-25 2012-08-14 Rapiscan Systems, Inc. X-ray scanners
US10483077B2 (en) 2003-04-25 2019-11-19 Rapiscan Systems, Inc. X-ray sources having reduced electron scattering
US9208988B2 (en) 2005-10-25 2015-12-08 Rapiscan Systems, Inc. Graphite backscattered electron shield for use in an X-ray tube
US8837669B2 (en) 2003-04-25 2014-09-16 Rapiscan Systems, Inc. X-ray scanning system
US8094784B2 (en) 2003-04-25 2012-01-10 Rapiscan Systems, Inc. X-ray sources
US9113839B2 (en) 2003-04-25 2015-08-25 Rapiscon Systems, Inc. X-ray inspection system and method
GB0309385D0 (en) 2003-04-25 2003-06-04 Cxr Ltd X-ray monitoring
GB0525593D0 (en) 2005-12-16 2006-01-25 Cxr Ltd X-ray tomography inspection systems
US6928141B2 (en) 2003-06-20 2005-08-09 Rapiscan, Inc. Relocatable X-ray imaging system and method for inspecting commercial vehicles and cargo containers
US7471764B2 (en) 2005-04-15 2008-12-30 Rapiscan Security Products, Inc. X-ray imaging system having improved weather resistance
US9046465B2 (en) 2011-02-24 2015-06-02 Rapiscan Systems, Inc. Optimization of the source firing pattern for X-ray scanning systems
GB0803644D0 (en) 2008-02-28 2008-04-02 Rapiscan Security Products Inc Scanning systems
GB0803641D0 (en) 2008-02-28 2008-04-02 Rapiscan Security Products Inc Scanning systems
JP5580288B2 (en) * 2008-04-17 2014-08-27 コーニンクレッカ フィリップス エヌ ヴェ X-ray tube with passive ion collector
GB0809110D0 (en) 2008-05-20 2008-06-25 Rapiscan Security Products Inc Gantry scanner systems
GB0816823D0 (en) 2008-09-13 2008-10-22 Cxr Ltd X-ray tubes
CN102224560B (en) * 2008-11-26 2015-08-05 皇家飞利浦电子股份有限公司 For the auxiliary grid electrode of X-ray tube
GB0901338D0 (en) 2009-01-28 2009-03-11 Cxr Ltd X-Ray tube electron sources
US9218933B2 (en) 2011-06-09 2015-12-22 Rapidscan Systems, Inc. Low-dose radiographic imaging system
WO2014121097A1 (en) 2013-01-31 2014-08-07 Rapiscan Systems, Inc. Portable security inspection system
JP6852969B2 (en) 2015-10-23 2021-03-31 キヤノンメディカルシステムズ株式会社 X-ray diagnostic equipment
US11551903B2 (en) 2020-06-25 2023-01-10 American Science And Engineering, Inc. Devices and methods for dissipating heat from an anode of an x-ray tube assembly

Also Published As

Publication number Publication date
BR7901075A (en) 1979-09-11
FR2418545A1 (en) 1979-09-21
AU4452879A (en) 1979-08-30
GB2015245A (en) 1979-09-05
DE2807735B2 (en) 1979-12-20
JPS54123891A (en) 1979-09-26
IT1112012B (en) 1986-01-13
IT7920373A0 (en) 1979-02-20
DE2807735A1 (en) 1979-08-30

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