6results about "X-ray tube cathode assembly" patented technology

Various methods and systems are provided for an emitter assembly for a cathode of an X-ray tube. In one example, an emitter assembly comprises a first end of a substantially flat emitter supported by two rods extending from a two-rod insulator assembly, and a second end of the substantially flat emitter supported by a compliant, single rod insulator assembly.

We provide a vacuum tube insertion assembly that prevents incorrect connections. [Solution] The vacuum tube insertion assembly includes a flared insertion part 40, each constructed from glass, having an annular flange 45 and a stem 46. The stem 46 extends axially from the flange 45, which surrounds the outer edge 47 of a plug recess 44 defined by the stem 46. A feedthrough pin 42 passes axially through the stem 46 and is sealed to the stem 46. The feedthrough pin 42 terminates inside the plug recess 44 to form the plug. The socket includes a receptacle that connects to the plug within the plug recess and is removably coupled to the feedthrough pin.

A filament assembly 10 for an x-ray tube 20 can include a planar filament 11 electrically-coupled between and substantially-encircled by a pair of collector plates C1 and C2. The pair of collector plates C1 and C2 can support the planar filament 11 so that it does not twist or warp and align the filament assembly 10 within a cathode cup 33. The pair of collector plates C1 and C2 can block electrons emitted from a back side of the filament. Without the collector plates C1 and C2, back side electrons can change direction by about 180°, hit the target, and distort a target electron spot. Each collector plate C1 or C2 can include holes H1 and H2. These holes H1 and H2 can aid in alignment of the collector plates C1 and C2 with electrodes 31 and electrode 32, can allow welding at a lower temperature, and can facilitate weld inspection.

Provided is a total reflection X-ray fluorescence spectrometer which has high analysis sensitivity and analysis speed. The total reflection X-ray fluorescence spectrometer includes: an X-ray source that has an electron beam focal point having an effective width in a direction parallel to a surface of a sample, and orthogonal to an X-ray irradiation direction, that is larger than a dimension in the irradiation direction; a reflective optic that has an effective width in the orthogonal direction that is larger than that of the electron beam focal point, and has a curved surface in the irradiation direction; and a plurality of detectors that are arranged in a row in the orthogonal direction, and are configured to measure intensities of fluorescent X-rays emitted from the sample irradiated with primary X-rays focused by the reflective optic.

Various methods and systems are provided for an emitter assembly for a cathode (352) of an X-ray tube. In one example, an emitter assembly comprises a first end (426) of a substantially flat emitter (424) supported by two rods extending from a two-rod insulator assembly (420), and a second end (428) of the substantially flat emitter (424) supported by a compliant, single rod insulator assembly (414).

High-voltage connectors and cathode assemblies for x-ray tubes are disclosed. A cathode assembly for an x-ray tube can include a high-voltage shield surrounding a cathode structure and a ceramic plate. The ceramic plate can include a central recess to receive the cathode structure and a vacuum side defining a V-shaped profile radially extending from the central recess, the central recess being defined by a first ridge of the V-shaped profile. The cathode assembly can be configured to limit an electric field at a shortest distance between the vacuum side and the high-voltage shield to 13 MV / m.