# US 2014/0153695 A1 · Radiation generating apparatus and radiation imaging apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153695 A1 - Document ID: US20140153695A1 - Status: Published application - Kind: A1 - Application number: 14/131,859 - Filed: 2012-07-24 - Published: 2014-06-05 - Earliest claimed: 2011-08-05 - Assignees: Canon Kabushiki Kaisha - Inventors: Yoshihiro Yanagisawa; Shuji Aoki; Miki Tamura; Kazuyuki Ueda; Ichiro Nomura - Web page: https://patentgrep.com/patent/US20140153695A1 ## CPC - G01N 23/04: and forming images of the material - H01J 35/12: Cooling non-rotary anodes - H01J 35/16: Vessels; Containers; Shields associated therewith - H05G 1/025: {Means for cooling the X-ray tube or the generator} - H05G 1/04: Mounting the X-ray tube within a closed housing - H01J 35/186: {used as targets or X-ray converters} - H01J 2235/122: of the window - H01J 2235/166: against electromagnetic radiation - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) - H05G: X-RAY TECHNIQUE (investigating or analysing materials by the use of X-rays G01N23/00; apparatus for X-ray photography G03B42/02; X-ray tubes H01J35/00; TV systems having X-ray input H04N5/321) ## Abstract A radiation generating apparatus includes: an envelope 1 having a first window 2 through which a radiation is transmitted; and a radiation tube 10 being held within the envelope 1, and having a second window 15 which is arranged in opposition to the first window 2, and through which the radiation is transmitted; and a radiation shielding member 16 thermally connected to the second window 15, having a radiation transmitting hole 21 arranged in communication with the second window 15, and having a protruding portion protruding from the second window 15 toward the first window 2. A thermal conducting member 17 having a higher thermal conductivity rather than that of the radiation shielding member 16 is connected to the protruding portion of the radiation shielding member 16. The radiation generating apparatus can shield an unnecessary radiation and cool a target with a simple structure and is entirely reduced in weight. ## Claims ### Claim 1 A radiation generating apparatus comprising: an envelope having a first window through which a radiation is transmitted; and a radiation tube being held within the envelope, and having a second window which is arranged in opposition to the first window, and through which the radiation is transmitted, wherein the radiation tube has a radiation shielding member having a protruding portion protruding from the second window toward the first window, and a thermal conducting member having a higher thermal conductivity rather than that of the radiation shielding member is connected to the protruding portion of the radiation shielding member. ### Claim 2 (depends on 1) The radiation generating apparatus according to claim 1, wherein the protruding portion forms a radiation transmitting hole arranged in communication with the second window. ### Claim 3 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member is arranged at an outer periphery of the protruding portion of the radiation shielding member. ### Claim 4 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member is arranged at an inner periphery of the protruding portion of the radiation shielding member. ### Claim 5 (depends on 1) The radiation generating apparatus according to claim 1, wherein an insulating fluid fills between the envelope and the radiation tube. ### Claim 6 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member has a smaller density rather than that of the radiation shielding member. ### Claim 7 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member and the radiation shielding member have shapes of co-axial cylinders, and the thermal conducting member has a larger thickness in a radial direction rather than that of the radiation shielding member. ### Claim 8 (depends on 5) The radiation generating apparatus according to claim 5, wherein the insulating fluid is an electrically insulating oil. ### Claim 9 (depends on 1) The radiation generating apparatus according to claim 1, wherein the radiation shielding member is connected to the second window by a silver brazing. ### Claim 10 (depends on 1) The radiation generating apparatus according to claim 1, wherein the radiation tube comprises an evacuated container, an electron emitting source arranged within the evacuated container, a target emitting a radiation in response to an irradiation with an electron emitted from the electron emitting source, and a substrate on which the target is formed at a side of the substrate opposing the electron emitting source, wherein the second window is formed in the substrate. ### Claim 11 (depends on 1) The radiation generating apparatus according to claim 1, wherein the radiation shielding member and the thermal conducting member are formed from metals or alloys different from each other. ### Claim 12 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member is formed from a ceramic. ### Claim 13 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member has a fin structure. ### Claim 14 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member is screwed shut to the radiation shielding member. ### Claim 15 (depends on 1) The radiation generating apparatus according to claim 1, wherein the thermal conducting member is formed from a carbon series material. ### Claim 16 (depends on 10) The radiation generating apparatus according to claim 10, wherein the target and the radiation shielding member are formed from tungsten, and the thermal conducting member is formed from copper. ### Claim 17 (depends on 1) A radiation imaging apparatus comprising: the radiation generating apparatus according to claim 1; a radiation detector for detecting the radiation emitted from the radiation generating apparatus and transmitted through an object; and a control unit for controlling the radiation generating apparatus and the radiation detector, so as to be correlated to each other.