US3836808A - Rotary anode for an x-ray tube - Google Patents

Rotary anode for an x-ray tube Download PDF

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Publication number
US3836808A
US3836808A US00369395A US36939573A US3836808A US 3836808 A US3836808 A US 3836808A US 00369395 A US00369395 A US 00369395A US 36939573 A US36939573 A US 36939573A US 3836808 A US3836808 A US 3836808A
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US
United States
Prior art keywords
molybdenum
rotary anode
ray tube
percent
struck
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
US00369395A
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English (en)
Inventor
R Friedel
B Natter
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
Siemens Corp
Original Assignee
Siemens Corp
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 Corp filed Critical Siemens Corp
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Publication of US3836808A publication Critical patent/US3836808A/en
Anticipated expiration legal-status Critical
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    • 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
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/08—Targets (anodes) and X-ray converters
    • H01J2235/083—Bonding or fixing with the support or substrate
    • H01J2235/084—Target-substrate interlayers or structures, e.g. to control or prevent diffusion or improve adhesion

Definitions

  • This invention relates to a rotary anode of an X-ray tube which delivers X-rays from at least the surface struck by electrons and consisting mostly of molybdenum.
  • Such anodes are used primarily in soft ray diagnosis, for example, in examination of female breasts.
  • a drawback is that anodes made of molybdenum or molybdenum alloys have a quick drop in ray delivery. This drop shows outwardly on the anodes in the form of a roughened surface.
  • An object of the present invention is to prevent at least to a great extent, theabove-mentioned drop in ray delivery and its cause, namely, the roughening.
  • the present invention pertains to a rotary anode of an X-ray tube which produces X-ray tubes at locations struck by electrons and consisting primarily of molybdenum.
  • the stated additions have a decisive advantage for the special use in female breast examination, in that their atomic number is close to that of molybdenum. Thus they do not produce a large proportion of hard rays which are detrimental for the exposure contrast.
  • the rotary anode of an X-ray tube consists of a plate of molybdenum or another material resistant to high temperatures which is mm thick.
  • the plate is coated with a layer having a thickness of 1 mm and consisting of an alloy of 75 percent molybdenum and 25 percent niobium. Due to this arrangement the roughness as compared to pure molybdenum is greatly diminished and the characteristic ray composition of a Mo-anode is preserved to a great extent. Molybdenum becomes substantially more ductile even with 3 percent niobium in the alloy, so that there is a diminished roughness during ray production. Other mentioned metals have the same effect as long as they have a melting point which is above 1,500 C.
  • FIG. 1 is side view, partly in section, of an entire X+ray tube provided with a rotary anode carrying a molybdenum alloy at the focal point path.
  • FIG. 2 is a section through a rotary anode for use with the tube shown in FIG. 1.
  • FIG. 1 shows an X-ray tube 2 with a container I having at one end the cathode arrangement 3 and at the other opposite end the anode arrangement 4.
  • the cathode device is fixed by a sleeve 5 to one end of the container] and has a shoulder 6 carrying the actual glow cathode 14.
  • the cathode device at the other end of tube container 1 is the anode device carrying a rotor 7 for driving the rotary anode 9 connected with it by an axle 8.
  • the rotary anode itself consists of a plate 10 which is I0 mm thick and consists of molybdenum'and 5 percent tungsten.
  • the plate is pressed by a screw 11 against the counter bearing 12 of the'axle 8 and is rotatable by the rotor 7 and a stator (not shown).
  • the plate 10 Upon its outer surface directed toward the cathode device 3 the plate 10 carries upon its edge a coating 13 having a thickness of I mm andconsisting of an alloy containing 97 percent molybdenum and 3 percent niobium.
  • a rotary anode for an X-ray tube having a surface to be struck by electrons for producing X-rays, said surface consisting of an alloy having up to 25 percent of niobium and at least percent of molybdenum.
  • a rotary anode according to claim 1 comprising a body consisting of a refractory material and having a coating consisting of said alloy.

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  • X-Ray Techniques (AREA)
US00369395A 1972-06-28 1973-06-12 Rotary anode for an x-ray tube Expired - Lifetime US3836808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2231687A DE2231687C3 (de) 1972-06-28 1972-06-28 Drehanode für Röntgenröhren

Publications (1)

Publication Number Publication Date
US3836808A true US3836808A (en) 1974-09-17

Family

ID=5849094

Family Applications (1)

Application Number Title Priority Date Filing Date
US00369395A Expired - Lifetime US3836808A (en) 1972-06-28 1973-06-12 Rotary anode for an x-ray tube

Country Status (5)

Country Link
US (1) US3836808A (enrdf_load_stackoverflow)
JP (1) JPS5636547B2 (enrdf_load_stackoverflow)
DE (1) DE2231687C3 (enrdf_load_stackoverflow)
FR (1) FR2191262B1 (enrdf_load_stackoverflow)
NL (1) NL177637C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433829A1 (fr) * 1978-07-24 1980-03-14 Gen Electric Anode tournante pour tube a rayons x
WO1997013267A3 (de) * 1995-10-04 1997-06-05 Geesthacht Gkss Forschung Röntgenstrahlungsquelle
EP2447710A2 (de) 2010-10-27 2012-05-02 Bruker AXS GmbH Verfahren zur röntgendiffraktometrischen Analyse bei unterschiedlichen Wellenlängen ohne Wechsel der Röntgenquelle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719854A (en) * 1969-07-24 1973-03-06 Schwarzkopf Dev Co Tungsten alloy x-ray target
US3737699A (en) * 1972-05-18 1973-06-05 Picker Corp X-ray tube having anode target layer of molybdenum rhenium alloy

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL122291C (enrdf_load_stackoverflow) * 1959-10-12
US3610984A (en) * 1967-12-28 1971-10-05 Tokyo Shibaura Electric Co Rotating-anode x-ray tube with multiple focal areas

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719854A (en) * 1969-07-24 1973-03-06 Schwarzkopf Dev Co Tungsten alloy x-ray target
US3737699A (en) * 1972-05-18 1973-06-05 Picker Corp X-ray tube having anode target layer of molybdenum rhenium alloy

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433829A1 (fr) * 1978-07-24 1980-03-14 Gen Electric Anode tournante pour tube a rayons x
US4195247A (en) * 1978-07-24 1980-03-25 General Electric Company X-ray target with substrate of molybdenum alloy
WO1997013267A3 (de) * 1995-10-04 1997-06-05 Geesthacht Gkss Forschung Röntgenstrahlungsquelle
EP2447710A2 (de) 2010-10-27 2012-05-02 Bruker AXS GmbH Verfahren zur röntgendiffraktometrischen Analyse bei unterschiedlichen Wellenlängen ohne Wechsel der Röntgenquelle
DE102010043028A1 (de) 2010-10-27 2012-05-03 Bruker Axs Gmbh Verfahren und Vorrichtung zur röntgendiffraktometrischen Analyse bei unterschiedlichen Wellenlängen ohne Wechsel der Röntgenquelle
US8867704B2 (en) 2010-10-27 2014-10-21 Bruker Axs Gmbh Method for X-ray diffractometry analysis at differing wavelengths without exchanging the X-ray source

Also Published As

Publication number Publication date
FR2191262B1 (enrdf_load_stackoverflow) 1978-05-26
DE2231687C3 (de) 1979-04-12
FR2191262A1 (enrdf_load_stackoverflow) 1974-02-01
NL7308640A (enrdf_load_stackoverflow) 1974-01-02
JPS4945693A (enrdf_load_stackoverflow) 1974-05-01
NL177637B (nl) 1985-05-17
NL177637C (nl) 1985-10-16
DE2231687B2 (enrdf_load_stackoverflow) 1978-08-03
JPS5636547B2 (enrdf_load_stackoverflow) 1981-08-25
DE2231687A1 (de) 1974-01-17

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