Abstract:
금속 전극과 절연 스페이서 사이의 접합부에서 맞대기 접합보다 상대적으로 접합력이 우수한 겹치기 접합이 이루어지고, 진공 브레이징 전에 구성 부품들을 정렬할 때 별도의 지그 없이도 구성 부품들을 정확히 정렬시킬 수 있도록 구성된 전계 방출 엑스선 소스 장치가 개시된다. 본 발명에 따른 전계 방출 엑스선 소스 장치는, 전기 절연성을 띤 튜브형 구조물로서, 그 말단에 근접한 외측면에 길이 방향으로 소정의 폭만큼 메탈라이징 된 접합 외측면을 갖는 절연 스페이서; 및, 상기 절연 스페이서의 말단에 인접하게 배치된 금속 구조물로서, 상기 접합 외측면의 적어도 일부분과 중첩되게 브레이징 접합된 접합 밴드부를 갖는 금속 전극;을 포함한다.
Abstract:
The present invention relates to X-ray generating technology in general. Providing X-ray generating device internal voltage sources or potentials may help reduce necessary feed-throughs into an evacuated envelope of an X-ray generating device. Consequently, an X-ray generating device comprising an electron scattering element is presented. According to the present invention, an X-ray generating device is provided, comprising an electron emitting element 16, an electron collecting element 20 and an electron scattering element 42. A primary electron beam 17a is arrangeable between the electron emitting element 16 and the electron collecting element 20. The electron emitting element 16 and the electron collecting element 20 are operatively coupled for generating X- radiation 14.
Abstract:
It is described an X-ray tube (100) comprising an ion manipulation arrangement (140) having at least one ion collector electrode (141). The ion collector electrode (141) is made at least partially from a getter material. The ion manipulation arrangement (140) is in particular beneficial for high-end X-ray-tubes including an electrical field-free region (131). The ion manipulation arrangement (140) produces an electrical field, which deflects ions (150). When impinging onto the getter electrode (141) the ions (150) are permanently collected and thus removed from the interior of an evacuated envelope of the X-ray tube (100). This avoids ion bombardment on an electron emitter (111) of the X-ray tube (100). Additionally the arcing rate caused by residual gas can be reduced significantly. A heating of the getter material may be realized with heating wires or by a defined bombardment of scattered electrons (322) onto the electrodes (341, 342) comprising the getter material.
Abstract:
The invention relates to an X-ray tube with a cathode, generating an electron beam, and an ion-deflecting and collecting setup (IDC), consisting of a single pair of electrodes, wherein the first electrode has a positive supply and the second electrode has either an actively or a passively generated negative voltage, compared to ground potential. Further, the invention relates to a method of voltage supplying of a deflecting and collecting setup (IDC) consisting of a single pair of electrode, wherein the first electrode has a positive voltage potential and the second electrode has either an actively or a passively generated negative voltage, compared to ground potential.
Abstract:
A novel x-ray treatment system utilizes one or more large area flat panel sources of x-ray radiation directed into a target zone. A target substance within the target zone is irradiated with x-ray radiation from the one or more flat panel sources, reducing the biological effects of a contaminant presence therein. The flat panel source comprises an electron source, an electron accelerator, and an electron target medium. The electron source may emit electrons either via field emission or thermionic emission. The x-ray source may operate in transmissive, reflective, or combined transmissive/reflective mode. The use of large area flat panel x-ray sources in the inventive systems allows for decreased installation and operational costs as well as increased efficiency.
Abstract:
Modulare Röntgenröhre (10) sowie Verfahren zur Herstellung einer solchen Röntgenröhre, bei welcher eine Anode (20) und eine Kathode (30) in einem vakuumisierten Innenraum (40) einander gegenüberliegend angeordnet sind, wobei Elektronen (e”) bei der Kathode (30) und Röntgenstrahlen (Y) bei der Anode (20) erzeugt werden. Die Röntgenröhre (10) umfasst mehrere einander ergänzende Beschleunigungsmodule (41,...,45) und jedes Beschleunigungsmodul (41,...,45) umfasst mindestens eine potentialtragende Beschleunigungselektrode (20/30/423/433/443). Ein erstes Beschleunigungsmodul (41) umfasst dabei die Kathode (30), ein zweites Beschleunigungsmodul (45) die Anode (20). Die Röntgenröhre (10) besteht zusätzlich aus mindestens einem weiteren Beschleunigungsmodul (42,...,44). Insbesondere kann die Röntgenröhre ein wiederverschliessbares Vakuumventil besitzen, wodurch einzelne defekte Teile der Röhre (10) einfach ersetzt werden können oder die Röhre (10) sich modular verändern lässt.
Abstract:
A modular multistage accelerator (102) for use in an X-ray treatment system includes a first 10kV acceleration stage (150) which houses an electron beam gun supplied with -50kV of voltage. The modular multi-stage accelerator includes four additional 10kV stages (112, 114, 116, 118) placed in series with the first stage to achieve a 50kV accelerator overall. Each stage is shielded (190) to prevent stray electrons from being propagated along the length of the drift tube. The triple point within each modular stage is recessed to significantly reduce the emission of stray electrons within each stage. Additionally, the beam current at the X-ray emitting probe of the X-ray source is measured by isolating the beam current to a beam current measuring circuit (220) in electrical connection with a nulling junction node, wherein other currents within the circuit are nulled at the nulling junction node and the beam current flows to the beam current measuring circuit.
Abstract:
Multibeam field emission x-ray systems and related methods can include cathode elements, an anode assembly spaced from the plurality of cathode elements, and an extraction gate positioned between the plurality of cathode elements and the anode assembly. A potential difference can be applied between the extraction gate and at least one of the cathode elements to cause an emission of electrons from the respective cathode elements. Emission characteristics of the cathode elements can be measured, and the potential difference between the extraction gate and at least one of the cathode elements can be adjusted based on the emission characteristics measured.
Abstract:
Systems, methods, and devices with improved electrode configuration for downhole nuclear radiation generators are provided. For example, one embodiment of a nuclear radiation generator capable of downhole operation may include a charged particle source, a target material, and an acceleration column between the charged particle source and the target material. The acceleration column may include several electrodes shaped such that substantially no electrode material from the electrodes is sputtered onto an insulator surface of the acceleration column during normal downhole operation.