US2665391A - X-ray tube having a mica window - Google Patents

X-ray tube having a mica window Download PDF

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Publication number
US2665391A
US2665391A US147739A US14773950A US2665391A US 2665391 A US2665391 A US 2665391A US 147739 A US147739 A US 147739A US 14773950 A US14773950 A US 14773950A US 2665391 A US2665391 A US 2665391A
Authority
US
United States
Prior art keywords
window
mica
envelope
tube
ray tube
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
US147739A
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English (en)
Inventor
Bleeksma Jan
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.)
Amperex Electronic Corp
Original Assignee
Amperex Electronic 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
Priority to NL84085D priority Critical patent/NL84085C/xx
Priority to NL6704999.A priority patent/NL157981B/nl
Priority to BE501636D priority patent/BE501636A/xx
Application filed by Amperex Electronic Corp filed Critical Amperex Electronic Corp
Priority to US147739A priority patent/US2665391A/en
Priority to GB4987/51A priority patent/GB687228A/en
Priority to FR1033351D priority patent/FR1033351A/fr
Priority to CH292563D priority patent/CH292563A/de
Application granted granted Critical
Publication of US2665391A publication Critical patent/US2665391A/en
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
    • H01J35/18—Windows
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/16—Vessels
    • H01J2235/165—Shielding arrangements
    • H01J2235/168—Shielding arrangements against charged particles

Definitions

  • My invention relates to X-ray tubes and particularly to X-ray tubes for X-ray difiraction purposes.
  • an X-ray tube primarily for X-ray difiraction study, is provided with a radiation permeable window which comprises a thin disc of insulating material which is permeable to X-radiation and which is sealed to the tube envelope in a vacuum-tight fashion and a thin foil of conductive material interposed between the disc of insulating material and the target of the tube to protect the latter from electron bombardment by providing a conductive path for electrons striking the window.
  • a thin mica disc is powder-glass sealed in a window support sealed to the walls of the tube envelope thereby providing a vacuum-tight window for the tube.
  • a thin disc of beryllium which protects the mica window from electron bombardment.
  • Fig. 1 shows a conventional X-ray tube for X-ray diffraction study provided with a window according to the invention and Fig. 2 shows the window construction in greater detail.
  • Fig. 1 shows an Xray tube for diffraction purposes provided with a sealed and evacuated envelope I, a cathode 2, and an anode 3.
  • the envelope at the level of the target is provided with four windows 4 of the type about to be described, through which a beam of X-radiation emerges. Provision is made in the jacket 5 for supplying power to energize the tube.
  • the window construction is shown in greater detail in Fig. 2.
  • the window comprises a ringshaped support 6 of stainless steel which is sealed to the envelope with powder-glass l.
  • a mica disc 8 Seated on a ridge in the support is a mica disc 8 having athickness of about 0.0003 to 0.0005 inch, which is sealed to the support with powder-glass 9 thereby providing a vacuum-tight seal for the window.
  • Seated beneath the support and supported by the envelope is a disc of beryllium l8- having a thickness of about 0.004 to 0.006 inch, which is sealed in place but is not vacuum-tight, and which serves to protect the mica disc from electron bombardment.
  • the absorption of X-rays by the mica and beryllium discs has been found to be about the same or less than absorption of X-rays by vacuum-tight beryllium discs which must be thicker to prevent atmospheric penetration of the beryllium, thereby destroying the vacuum in the tube.
  • An X-ray tube comprising an evacuated envelope, cathode and anode electrodes, and a radiation permeable window in a wall portion of said envelope facing said anode, said window comprising a metallic window support powder-glass sealed into said envelope, a mica window seated in said support and powder-glass sealed thereto to provide a vacuum-tight seal for said mica disc, and a thin foil of radiation permeable metal secured to said envelope between said support and the anode of the tube to provide a conductive path for electrons striking the window.
  • An X-ray tube comprising an evacuated envelope, cathode and anode electrodes facing said anode, and a radiation permeable window in a wall portion of said envelope, said window comprising a window support powder-glass sealed into said envelope, a mica window seated in said support and powder-glass sealed thereto to provide a vacuum-tight seal for the mica disc, and a thin foil of beryllium interposed between the mica window and the anode of the tube to provide a conductive path for electrons striking thewindow.
  • An X-ray tube comprising an evacuated envelope, cathode and anode electrodes, and a radiation permeable window in a wall portion of said envelope facing said anode, said window comprising a mica disc vacuum sealed to said envelope, and a thin beryllium disc interposed between the mica disc and the anode of the tube to provide a conductive path for electrons striking the window.
  • An X-ray tube comprising an evacuated envelope, cathode and anode electrodes, and a radiation permeable window in a wall portion of said envelope facing said anode, said window comprising a metallic window support powderglass sealed to said envelope, a mica window seated in said support and powder-glass sealed thereto to provide a vacuum-tight seal for the mica window, and a beryllium window secured to the walls of the envelope and interposed between the mica window and the anode of the tube for providing a conductive path for elec trons striking the window.
  • An X-ray tube comprising an evacuated References Cited in the file of this patent UNITED STATES PATENTS Number Name Date. 1,626,465 Holst et al. Apr. 26, 1927 1,626,693 Rentschler May 3, 1927 1,927,475 Volkel Sept. 19, 1933 2,009,457 Sloan July 30, 1935 2,024,332 Bouwers Dec. 17, 1935 2,125,700 Volkel Aug., 2, 1938 2,356,645 .Atlee et al. Aug. 22, 1944

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  • Glass Compositions (AREA)
  • X-Ray Techniques (AREA)
US147739A 1950-03-04 1950-03-04 X-ray tube having a mica window Expired - Lifetime US2665391A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL84085D NL84085C (nl) 1950-03-04
NL6704999.A NL157981B (nl) 1950-03-04 Luchtgekoelde condensorinrichting.
BE501636D BE501636A (nl) 1950-03-04
US147739A US2665391A (en) 1950-03-04 1950-03-04 X-ray tube having a mica window
GB4987/51A GB687228A (en) 1950-03-04 1951-03-01 Improvements in or relating to x-ray tubes
FR1033351D FR1033351A (fr) 1950-03-04 1951-03-02 Tube à rayons chi pour observations par diffraction
CH292563D CH292563A (de) 1950-03-04 1951-03-02 Röntgenröhre zur Erzeugung weicher Röntgenstrahlen, mit mindestens einem luftdicht abschliessenden Strahlenaustrittsfenster aus Isolierstoff.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US147739A US2665391A (en) 1950-03-04 1950-03-04 X-ray tube having a mica window

Publications (1)

Publication Number Publication Date
US2665391A true US2665391A (en) 1954-01-05

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ID=22522702

Family Applications (1)

Application Number Title Priority Date Filing Date
US147739A Expired - Lifetime US2665391A (en) 1950-03-04 1950-03-04 X-ray tube having a mica window

Country Status (6)

Country Link
US (1) US2665391A (nl)
BE (1) BE501636A (nl)
CH (1) CH292563A (nl)
FR (1) FR1033351A (nl)
GB (1) GB687228A (nl)
NL (2) NL157981B (nl)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866114A (en) * 1953-06-12 1958-12-23 Philips Corp Beryllium window x-ray tube
US2899598A (en) * 1959-08-11 ginzton
US3018398A (en) * 1958-10-27 1962-01-23 Dunlee Corp X-ray generator
US3135889A (en) * 1962-05-22 1964-06-02 Jack A Soules Protected window x-ray tube
US3419741A (en) * 1966-04-19 1968-12-31 Thomas Electronics Inc Vacuum seal for a thin beryllium x-ray window
US3500097A (en) * 1967-03-06 1970-03-10 Dunlee Corp X-ray generator
US4045699A (en) * 1973-06-19 1977-08-30 Siemens Aktiengesellschaft Use of light-metal panes as x-ray transmissive windows
FR2389227A1 (fr) * 1977-04-25 1978-11-24 Philips Nv Tube de rontgen
US4178509A (en) * 1978-06-02 1979-12-11 The Bendix Corporation Sensitivity proportional counter window
US5013922A (en) * 1990-03-13 1991-05-07 General Electric Company Reduced thickness radiation window for an ionization detector
EP0491471A3 (en) * 1990-11-21 1992-09-30 Varian Associates, Inc. High power x-ray tube
EP0768699A1 (en) * 1995-09-27 1997-04-16 Kevex X-Ray Inc. X-ray tube and barrier means therefor
US6052429A (en) * 1997-02-20 2000-04-18 Dkk Corporation X-ray analyzing apparatus
US6118852A (en) * 1998-07-02 2000-09-12 General Electric Company Aluminum x-ray transmissive window for an x-ray tube vacuum vessel
US6215852B1 (en) 1998-12-10 2001-04-10 General Electric Company Thermal energy storage and transfer assembly
DE10313863A1 (de) * 2003-03-21 2004-10-21 Siemens Ag Röntgenstrahlenfenster für Vakuumröhren
US8681943B2 (en) 2009-01-26 2014-03-25 Excillum Ab X-ray window

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106683964B (zh) * 2013-01-22 2018-11-09 上海联影医疗科技有限公司 双窗x射线球管及x射线摄影系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1626465A (en) * 1922-12-06 1927-04-26 Philips Nv X-ray tube
US1626693A (en) * 1922-11-29 1927-05-03 Westinghouse Lamp Co High-voltage electron device
US1927475A (en) * 1930-09-09 1933-09-19 Mueller C H F Ag High vacuum discharge vessel in particular X-ray tubes
US2009457A (en) * 1932-04-11 1935-07-30 Research Corp Method and apparatus for producing high voltage
US2024332A (en) * 1930-04-16 1935-12-17 Philips Nv Discharge tube having a metal envelope
US2125700A (en) * 1932-12-02 1938-08-02 Mueller C H F Ag High tension discharge vessel
US2356645A (en) * 1943-02-08 1944-08-22 Gen Electric X Ray Corp X-ray tube

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1626693A (en) * 1922-11-29 1927-05-03 Westinghouse Lamp Co High-voltage electron device
US1626465A (en) * 1922-12-06 1927-04-26 Philips Nv X-ray tube
US2024332A (en) * 1930-04-16 1935-12-17 Philips Nv Discharge tube having a metal envelope
US1927475A (en) * 1930-09-09 1933-09-19 Mueller C H F Ag High vacuum discharge vessel in particular X-ray tubes
US2009457A (en) * 1932-04-11 1935-07-30 Research Corp Method and apparatus for producing high voltage
US2125700A (en) * 1932-12-02 1938-08-02 Mueller C H F Ag High tension discharge vessel
US2356645A (en) * 1943-02-08 1944-08-22 Gen Electric X Ray Corp X-ray tube

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899598A (en) * 1959-08-11 ginzton
US2866114A (en) * 1953-06-12 1958-12-23 Philips Corp Beryllium window x-ray tube
US3018398A (en) * 1958-10-27 1962-01-23 Dunlee Corp X-ray generator
US3135889A (en) * 1962-05-22 1964-06-02 Jack A Soules Protected window x-ray tube
US3419741A (en) * 1966-04-19 1968-12-31 Thomas Electronics Inc Vacuum seal for a thin beryllium x-ray window
US3500097A (en) * 1967-03-06 1970-03-10 Dunlee Corp X-ray generator
US4045699A (en) * 1973-06-19 1977-08-30 Siemens Aktiengesellschaft Use of light-metal panes as x-ray transmissive windows
FR2389227A1 (fr) * 1977-04-25 1978-11-24 Philips Nv Tube de rontgen
US4178509A (en) * 1978-06-02 1979-12-11 The Bendix Corporation Sensitivity proportional counter window
US5013922A (en) * 1990-03-13 1991-05-07 General Electric Company Reduced thickness radiation window for an ionization detector
EP0491471A3 (en) * 1990-11-21 1992-09-30 Varian Associates, Inc. High power x-ray tube
EP0991106A2 (en) * 1990-11-21 2000-04-05 Varian Associates, Inc. High power X-Ray tube
EP0991106A3 (en) * 1990-11-21 2000-05-03 Varian Associates, Inc. High power X-Ray tube
EP0768699A1 (en) * 1995-09-27 1997-04-16 Kevex X-Ray Inc. X-ray tube and barrier means therefor
US6052429A (en) * 1997-02-20 2000-04-18 Dkk Corporation X-ray analyzing apparatus
US6118852A (en) * 1998-07-02 2000-09-12 General Electric Company Aluminum x-ray transmissive window for an x-ray tube vacuum vessel
US6215852B1 (en) 1998-12-10 2001-04-10 General Electric Company Thermal energy storage and transfer assembly
US6301332B1 (en) 1998-12-10 2001-10-09 General Electric Company Thermal filter for an x-ray tube window
DE10313863A1 (de) * 2003-03-21 2004-10-21 Siemens Ag Röntgenstrahlenfenster für Vakuumröhren
US20040228448A1 (en) * 2003-03-21 2004-11-18 Peter Rother X-ray beam emission window for vacuum tubes
DE10313863B4 (de) * 2003-03-21 2006-01-19 Siemens Ag Röntgenstrahlaustrittsfenster, insbesondere für Megalixröhren
US8681943B2 (en) 2009-01-26 2014-03-25 Excillum Ab X-ray window
CN102293061B (zh) * 2009-01-26 2014-05-07 伊克斯拉姆公司 X-射线窗口

Also Published As

Publication number Publication date
GB687228A (en) 1953-02-11
BE501636A (nl)
NL84085C (nl)
CH292563A (de) 1953-08-15
NL157981B (nl)
FR1033351A (fr) 1953-07-10

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