Magnetic head for X-ray source
First Claim
1. An X-ray source device with a magnetic appliance coupled to its anode for electron beam focusing, comprising:
- a) an evacuated tube;
b) an anode, coupled to the tube, including a material configured to produce X-rays in response to impact of electrons;
c) a cathode, coupled to the tube opposing the anode, including a cathode element, configured to produce electrons accelerated towards the anode in response to an electric field between the anode and the cathode,d) an annular magnetic appliance, circumscribing the anode, to focus an electron-beam; and
e) wherein the annular magnetic appliance provides focusing of an electron beam within the X-ray source device, the resulting focused electron beam having a cross-sectional diameter reduced to at least 1/2 to 1/50th in size relative to an unfocused electron beam produced without the annular magnetic appliance.
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Accused Products
Abstract
An X-ray source includes a magnetic appliance to provide electron beam focusing. The magnetic appliance can provide variably focused and non-focused configurations. The magnetic appliance can include one or more electromagnets and/or permanent magnets. An electric potential difference is applied to an anode and a cathode that are disposed on opposite sides of an evacuated tube. The cathode includes a cathode element to produce electrons that are accelerated towards the anode in response to the electric field between the anode and the cathode. The anode includes a target material to produce x-rays in response to impact of electrons.
86 Citations
31 Claims
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1. An X-ray source device with a magnetic appliance coupled to its anode for electron beam focusing, comprising:
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a) an evacuated tube; b) an anode, coupled to the tube, including a material configured to produce X-rays in response to impact of electrons; c) a cathode, coupled to the tube opposing the anode, including a cathode element, configured to produce electrons accelerated towards the anode in response to an electric field between the anode and the cathode, d) an annular magnetic appliance, circumscribing the anode, to focus an electron-beam; and e) wherein the annular magnetic appliance provides focusing of an electron beam within the X-ray source device, the resulting focused electron beam having a cross-sectional diameter reduced to at least 1/2 to 1/50th in size relative to an unfocused electron beam produced without the annular magnetic appliance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An X-ray source device with a magnetic head for electron beam focusing, comprising:
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a) an evacuated tube formed of a ceramic material; b) an anode, disposed at one end of the tube, including; i) a tube extension, brazed to the evacuated tube, formed of a ferromagnetic material; ii) a window mount, attached to the tube extension, including a target with a material configured to produce X-rays in response to impact of electrons; and iii) a drift tube, extending through and defined by the tube extension and the window mount; c) a cathode, disposed at another end of the tube opposing the anode, including a cathode element configured to produce electrons accelerated towards the anode in response to an electric field between the anode and the cathode; d) an annular magnet, circumscribing the anode; e) an annular exit pole piece, proximate to and forward of the annular magnet, extending to the window mount; and f) an annular shunt, proximate to and rearward of the annular magnet, defining a second pole piece, extending to the tube extension. - View Dependent Claims (30)
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31. A magnetic head device for focusing an electron beam of an X-ray source, comprising:
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an annular magnet, including at least one permanent magnet, configured to circumscribe an anode; an annular pole piece, proximate to and forward of the annular magnet; an annular shunt, proximate to and rearward of the annular magnet, defining a second pole piece.
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Specification