公开(公告)号：EP2311062A2

公开(公告)日：2011-04-20

申请号：EP09784715.6

申请日：2009-07-15

Applicant: CXR Limited

Inventor： MORTON, Edward, James ,  LUGGAR, Russell David ,  HUNT, Martin

IPC: H01J35/12

CPC classification number: H01J35/12 ,  H01J35/08 ,  H01J2235/081 ,  H01J2235/083 ,  H01J2235/086 ,  H01J2235/1204 ,  H01J2235/1262

Abstract: An anode for an X-ray tube comprises at least one thermally conductive anode segment in contact with a rigid support member and cooling means arranged to cool the anode. The anode may comprise a plurality of anode segments aligned end to end, each in contact with the support member.

公开(公告)号：EP2291327A1

公开(公告)日：2011-03-09

申请号：EP09757369.5

申请日：2009-04-29

Applicant: H.C. Starck GmbH

Inventor： OLBRICH, Armin ,  JAHN, Matthias ,  MEESE-MARKTSCHEFFEL, Juliane ,  ZERTANI, Rüdiger

IPC: C01G47/00

CPC classification number: C01G47/00 ,  C01G47/003 ,  C01P2006/80 ,  C22B61/00 ,  H01J35/08

Abstract: The invention relates to a process for producing pure ammonium perrhenate by reacting perrhenic acid with ammonia, and also to high-purity ammonium perrhenate.

公开(公告)号：EP2089555A1

公开(公告)日：2009-08-19

申请号：EP07871504.2

申请日：2007-11-16

Applicant: H. C. Starck, Inc.

Inventor： HAYWISER, Leah F. ,  SHEKHTER, Leonid Natan

IPC: C22C27/04 ,  H01J35/08

CPC classification number: H01J35/08 ,  C22C27/04 ,  H01J2235/081

Abstract: The present invention is directed a molybdenum alloy consisting essentially of a) molybdenum present in a major amount, b) tantalum and tungsten as major metal alloy additions and c) a minor amount of an element selected from the group consisting of boron, hafnium, carbon and mixtures thereof. The invention is also directed to an X-ray tube anode composed of a molybdenum alloy body having a focal track thereon, with the body consisting essentially of the above-described molybdenum alloy.

公开(公告)号：EP2016608A1

公开(公告)日：2009-01-21

申请号：EP07748112.5

申请日：2007-05-08

Applicant: Jettec AB

Inventor： HERTZ, Hans, M. ,  OTENDAL, Mikael ,  TUOHIMAA, Tomi

IPC: H01J35/08 ,  H05G2/00

CPC classification number: H01J35/08 ,  G21K2207/005 ,  H01J2235/082 ,  H05G2/005

Abstract: A method for generating x-ray radiation, comprising the steps of forming a target jet by urging a liquid substance under pressure through an outlet opening, the target jet propagating through an area of interaction; and directing at least one electron beam onto the target jet in the area of interaction such that the electron beam interacts with the target jet to generate x-ray radiation; wherein the full width at half maximum of the electron beam in the transverse direction of the target jet is about 50% or less of the target jet transverse dimension. A system for carrying out the method is also disclosed.

公开(公告)号：EP1738389B1

公开(公告)日：2007-08-29

申请号：EP05718604.1

申请日：2005-03-31

Applicant: Koninklijke Philips Electronics N.V. ,  Philips Intellectual Property & Standards GmbH

Inventor： BARSCHORF, Hans ,  DAVID, Bernd, R. ,  THRAN, Axel

IPC: H01J35/08

CPC classification number: H01J35/08 ,  H01J2235/082

Abstract: The invention relates to a device for generating X-rays (18) comprising an electron source (3) for emitting electrons accommodated in a vacuum space (2), a liquid metal circuit including a liquid metal for emitting X-rays as a result of the incidence of electrons and a pumping means (11) for causing a flow of the liquid metal through a constriction (7) where the electrons emitted by the electron source (3) impinge upon the liquid metal, and a radiation window (12) bounding said constriction (7), which is transparent to electrons and X-rays and separates the constriction (7) from the vacuum space (2). To provide a device for generating X-rays in which a cross-sectional area of the constriction substantially corresponds to an intended, desired cross-sectional area due to a self-regulating process without the need for external or additional components or electronics, it is proposed that said constriction (7) being bounded by a compensation window (13) opposite of said radiation window (12), which separates the constriction (7) from a pressure chamber (14) containing liquid metal provided by said liquid metal circuit via a connection (15), and which, during operation, has a profile (p') as a result of a deformation caused by a pressure in the pressure chamber (14) different from the pressure in the constriction (7) which substantially matches a profile (p) which the radiation window (12) has, during operation, as a result of a deformation of the radiation window (12) caused by a pressure of the liquid metal in the constriction (7).

公开(公告)号：EP1754241A2

公开(公告)日：2007-02-21

申请号：EP05753826.6

申请日：2005-05-23

Applicant: Cabot Microelectronics Corporation

Inventor： LESIAK, Stanley c/o Legal Department ,  BUSTA, Heinz c/o Legal Department ,  ZWICKER, Bruce c/o Legal Department

IPC: H01J35/04

CPC classification number: H01J35/065 ,  G21K5/02 ,  H01J35/08 ,  H01J2235/062 ,  H01J2235/068 ,  H01J2235/086 ,  H01J2235/163

Abstract: An improved x-ray generation system produces a converging or diverging radiation pattern particularly suited for substantially cylindrical or spherical treatment devices. In an embodiment, the system comprises a closed or concave outer wall about a closed or concave inner wall. An electron emitter is situated on the inside surface of the outer wall, while a target film is situated on the outside surface of the inner wall. An extraction voltage at the emitter extracts electrons which are accelerated toward the inner wall by an acceleration voltage. Alternately, electron emission may be by thermionic means. Collisions of electrons with the target film causes x-ray emission, a substantial portion of which is directed through the inner wall into the space defined within. In an embodiment, the location of the emitter and target film are reversed, establishing a reflective rather than transmissive mode for convergent patterns and a transmissive mode for divergent patterns.

公开(公告)号：EP1754240A2

公开(公告)日：2007-02-21

申请号：EP05774756.0

申请日：2005-05-04

Applicant: COMET GmbH

Inventor： REINHOLD, Alfred

IPC: H01J35/00

CPC classification number: H01J35/08 ,  G03F7/70008 ,  H01J2235/081 ,  H01J2235/088

Abstract: Disclosed is an apparatus (2) for generating and emitting XUV radiation. Said apparatus (2) comprises a target (4) which emits XUV radiation when hit by electrically charged particles. Said target (4) encompasses a base (18) that is provided at least in part with a first layer (2Q) containing a material which emits XUV radiation when hit by electrically charged particles. According to the invention, at least one second layer (22) containing a highly electrically conductive material is provided in addition to the first layer (20).

公开(公告)号：EP0957506B1

公开(公告)日：2005-11-16

申请号：EP99201442.3

申请日：1999-05-07

Applicant: Philips Intellectual Property & Standards GmbH ,  Koninklijke Philips Electronics N.V.

Inventor： Harding, Geoffrey, Philips Patentverwaltung GmbH

IPC: H01J35/18 ,  H01J35/08

CPC classification number: H01J35/08 ,  H01J35/18 ,  H01J2235/082

公开(公告)号：EP1407468B1

公开(公告)日：2005-09-28

申请号：EP02797023.5

申请日：2002-07-02

Applicant: GENERAL ATOMICS

Inventor： HORNER, Mervyn, H. ,  TRESTER, Paul, w. ,  VALENTINE, Peter, G.

IPC: H01J35/10

CPC classification number: H01J9/02 ,  B23K35/001 ,  B23K35/005 ,  B23K35/327 ,  C04B35/5622 ,  C04B35/5626 ,  C04B35/5805 ,  C04B37/00 ,  C04B37/026 ,  C04B2235/3813 ,  C04B2235/3839 ,  C04B2235/3847 ,  C04B2235/404 ,  C04B2235/422 ,  C04B2235/6581 ,  C04B2235/9607 ,  C04B2237/122 ,  C04B2237/36 ,  C04B2237/363 ,  C04B2237/385 ,  C04B2237/403 ,  C04B2237/525 ,  H01J35/08 ,  H01J2235/083

Abstract: Reaction-brazing of tungsten or molybdenum metal bodies to carbonaceous supports enables an x-ray generating anode to be joined to a preferred lightweight substrate. Complementary surfaces are provided on a dense refractory metal body and a graphite or a carbon-carbon composite support. A particulate braze mixture comprising Hf or Zr carbide, Mo or W boride, Hf or Zr powder and Mo or W powder is coated onto the support surface, and hafnium or yirconium foil may be introduced between the braze mixture and the refractory metal body complementary surface. Reaaction-brazing is carried out at or near the eutectic po8int of the components, which may be influenced to some extent by the presence of carbon and boride. Heating to about 1865°C for a Mo/hf combination creates a thin, dense, strong braze tah securely joins the two bodies and creates a thin barrier or carbide and boride microphases near and along the interface with the carbon support that diminishes carbon diffusion into the metal body during extended exposures at elevated temperatures (above those presently used in x-ray tubes), even well above the entectoid temperature.

公开(公告)号：EP1488441A2

公开(公告)日：2004-12-22

申请号：EP03710776.0

申请日：2003-01-30

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： CHARLES, Harry K, ,  BECK, Thomas J,

IPC: H01J35/10 ,  H01J35/12 ,  H01J35/08 ,  H01J35/18 ,  H05G1/02

CPC classification number: H05G1/02 ,  H01J35/08 ,  H01J35/108 ,  H01J35/12 ,  H01J35/18 ,  H01J35/30 ,  H01J2235/081 ,  H01J2235/083 ,  H01J2235/087 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/186 ,  H05G1/025

Abstract: An x-ray tube and method of operating include a vacuum chamber vessel and a source of an electron beam inside the vacuum chamber vessel. A target disposed inside the vacuum chamber vessel includes a substrate and one or more deposits attached to the substrate. Each different deposit includes an atomic element having a different atomic number. The x-ray tube also includes a means for directing the electron beam to a selectable deposit of multiple deposits. The substrate material can be selected with better vacuum sustaining strength, x-ray transparency, melting point, and thermal conductivity than a deposit. The substrate may be cooled by an integrated cooling system. The x-ray tube allows a selectable x-ray frequency to be produced with enhanced economy of power, reduced moving parts, and reduced size. For improved bone mass applications, one of the deposits has a k-fluorescence energy less than about 53 thousand electron volts.