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; and
d) an annular magnetic appliance, circumscribing the anode, to focus an electron-beam.
1 Assignment
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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.
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Citations
26 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; and
d) an annular magnetic appliance, circumscribing the anode, to focus an electron-beam. - 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)
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24. 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.
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26. A magnetic head device for focusing an electron beam of an X-ray, comprising:
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an annular 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. - View Dependent Claims (25)
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Specification