Abstract:
Cette source monochromatique de rayons X comprend une cible (1) composée notamment d'un matériau intégrant des atomes émetteurs constitués d'un élément, lesdits atomes étant excités par bombardement électronique essentiellement des électrons situés sur les couches K desdits atomes. Le matériau constitutif de la cible se trouve globalement à l'état solide et sa cohésion est assurée au moyen d'atomes structurants représentant un ou plusieurs éléments et liés aux atomes émetteurs, lesdits atomes structurants possédant un coefficient d'absorption des rayons X émis par les atomes émetteurs inférieur ou égal à 2,3 μm -1 .
Abstract:
PURPOSE: An x-ray target and a method for manufacturing the same are provided to generate coherent x-ray beams by forming an integrated type x-ray single mode source through a nano-channel formatting method. CONSTITUTION: A substrate is washed with acetone and distilled water. The substrate is mounted to a sputtering device. The sputtering device is formed into an ultra-high vacuum state. Argon gas is introduced into a vacuum chamber. A tungsten thin film is deposited to form a buffer layer. The thickness of the tungsten thin film is 200nm. An optical mask is arranged on the core(50) of a waveguide Beryllium is deposited to the core. The optical mask is eliminated.
Abstract:
An X-ray assembly may include a vacuum wall, an anode, and a cathode. The vacuum wall may define a vacuum enclosure and may include an X-ray window. The anode may be located within the vacuum enclosure. The anode may include a target area. The cathode may be located within the vacuum enclosure. The cathode may generate an electron stream to travel to a focus area located at the target area of the anode. The cathode may be positioned such that the electron stream travels along an oblique path relative a virtual line positioned so as to intersect a center of the focus area and a center of the X-ray window.
Abstract:
Die vorliegende Erfindung bezieht sich auf eine Röntgenröhre zur Erzeugung von Röntgenstrahlung mit einer Anode (4), welche ein Phasenwechselmaterial, PCM (11), zur Kühlung umfasst, und auf ein Verfahren zur Herstellung der Röntgenröhre. Das Phasenwechselmaterial (11) ist im Anodenmaterial angeordnet und kann z.B. durch Gießen in flüssiger Form in die Anode (4) eingebracht werden.
Abstract:
Methods and apparatus for independent control of electron emission current and x-ray energy in x-ray tubes are provided. The independent control can be accomplished by adjusting the distance between the cathode and anode. The independent control can also be accomplished by adjusting the temperature of the cathode. The independent control can also be accomplished by optical excitation of the cathode. The cathode can include field emissive materials such as carbon nanotubes.
Abstract:
A bearing assembly (400) for a rotating anode (206) x-ray device. The bearing assembly (400) includes a shaft (402) having a flange (402B) at one end for attachment of the anode (206) thereto. The shaft (402) defines front and rear inner races (402D, 402E) and includes a plurality of extended surfaces (414, 416). Front and rear outer race elements (404, 406) define front and rear outer races (404B, 406A), respectively, corresponding to the front and rear inner races (402D, 402E), respectively, defined by the shaft (402). The front and rear outer race elements (404, 406) cooperate with the shaft (402) to confine front and rear ball sets (410, 412) which facilitate rotary motion of the shaft (402). A spacer (408) including extended surfaces (414, 416) assists in the positioning of the front and rear outer race elements (404, 406) in a bearing housing (500). The extended surfaces (414, 416) of the shaft (402) and spacer (408), in conjunction with emissive coatings provided on various portions of selected components of the bearing assembly (500), facilitate a relative improvement in heat transfer out of the bearing assembly (500).
Abstract:
일 실시형태에 관한 회전 양극형 X선관 어셈블리는 X선관(30), 스테이터 코일(90), 하우징(20), X선 방사층(20w) 및 냉각액(7)을 구비한다. 하우징은 X선 방사구(20o1)를 갖고 X선관이 직접 또는 간접적으로 고정되는 제1 분할부(20a)와, 양극 타겟 회전기구(14)에 대해서 양극 타겟(35)의 반대측에 위치하고 제1 분할부에 결합되는 제2 분할부(20c)를 갖는다. 제1 분할부와 제2 분할부의 결합면은 한 평면상에 위치하고, 축선(a)에 수직인 방향을 제외하고 축선에 대해서 경사져 있다.
Abstract:
PURPOSE: A rotary anode X-ray tube is capable of informing the temperature of a dynamic pressure sliding bearing portion and inhibiting the temperature rise, so as to manufacture and superior in mechanical strength for maintaining stable rotating property for a long time. CONSTITUTION: The rotary anode X-ray tube comprises a rotor(16) connected with an anode target(13) for emitting an X-ray, a fixed body(17) provided with a dynamic pressure sliding bearing in a space to the rotor(16) and having a lubricant storage room(26) formed along a tube axis and a lubricant passage(27) connecting the lubricant storage room(26) and the dynamic pressure sliding bearing, and a vacuum container(11). The fixed body(17) is provided with holes(28a,28b) ranging from the end face toward the tube axis, without crossing the lubricant storage room(26) and the lubricant passage(27), and fixed body heat transfer members(29a,29b) having higher heat conductivity than the fixed body(17) are fitted into the holes(28a,28b), or a heat transfer member(19) having higher heat conductivity than an inside cylindrical structure is cylindrically bonded to the outer periphery wall of the inside cylindrical structure(16c) constituting a bearing of the rotor(16). Otherwise, heat transfer members are provided on both the rotor and the fixed body.