| Patent application number | Description | Published |
|---|
| 20090041195 | LASER STIMULATED CATHODE - A cathode has an emission layer that thermionically emits electrons upon exposure with a laser beam. The material of the emission layer has a product of density (ρ), measured in | 02-12-2009 |
| 20100046715 | X-RAY RADIATOR WITH GAS-FILLED X-RAY BEAM EXIT CHAMBER - An x-ray radiator for a medical technology x-ray apparatus, has a vacuum chamber arranged in a protective housing, in which is arranged an anode that emits an x-ray beam. The vacuum chamber is surrounded by a protective chamber formed between the protective housing and the vacuum chamber and filled with an electrically insulating liquid. A beam passage chamber filled with a gas is arranged in the protective chamber. The beam passage chamber is traversed by the x-ray beam exiting from the vacuum chamber and propagating toward the protective housing. The amount of secondary radiation generated by the x-ray radiator upon operation is thereby reduced. | 02-25-2010 |
| 20100046716 | X-RAY TUBE WITH BACKSCATTER PROTECTION - An x-ray tube has a vacuum housing containing an anode that generates usable x-ray radiation upon being struck by electrons generated by an electron source. The usable x-ray radiation escapes from the vacuum housing through an x-ray exit window. A backscatter electron barrier device arranged in the vacuum housing affects the backscatter electrons in the region of the usable x-ray radiation such that no backscatter electrons reach the x-ray exit window. Such an x-ray tube exhibits an invariably constant x-ray intensity and a high reliability. | 02-25-2010 |
| 20100061516 | ELECTRON BEAM CONTROLLER OF AN X-RAY RADIATOR WITH TWO OR MORE ELECTRON BEAMS - An x-ray tube has a number of emitters that generate respective electron beams, and has a common anode at which the electron beams strike on a surface to generate x-rays. A high x-ray dose power with a long lifespan are achieved while being able to quickly vary the x-ray dose power by using a superimposed intensity distribution from the x-ray beams, which is measured by a detector, to optimize the x-ray beams on the surface. | 03-11-2010 |
| 20100067663 | CATHODE - A cathode HAS a cathode head in which a surface emitter is arranged that emits electrons upon application of a heating voltage. The surface emitter is fashioned as a parallel surface emitter with at least two emitter surfaces spaced apart from one another, to which at least one electrically conductive cutoff electrode is fed that is galvanically separated from the parallel surface emitter. Such a cathode has a good cutoff capability. | 03-18-2010 |
| 20100181942 | THERMIONIC EMISSION DEVICE - A thermionic emission device, in particular for use in an x-ray tube, has an indirectly heated primary emitter that is fashioned as a flat emitter with an unstructured primary emission surface, and a heating emitter that is fashioned as a flat emitter with a structured heat emission surface. The primary emitter and the heating emitter each has at least two terminal lugs, and the primary emission surface and the heat emission surface are aligned essentially parallel to one another. The emission device provides an optimally high quality of the focal spot with a simple design and, given high thermal load, an unwanted widening or defocusing of the electron beam is avoided by the terminal lugs of the primary emitter being aligned essentially perpendicular to the primary emission surface and not protruding beyond the primary emission surface in the lateral direction. | 07-22-2010 |
| 20100195800 | X-RAY TUBE - An x-ray tube has an anode and a thermionic emitter with multiple emitter regions spaced from one another that generate, between the emitter and the anode, an electron beam composed of multiple partial beams generated by the respective emitter regions. Between the emitter and the anode is at least one control electrode arrangement that generates a variable electrical field and that has a number of passages to control the respective partial beams. Thus control electrode arrangement has a number of control electrode layers. The individual emitter regions and the control electrodes are arranged and controlled relative to one another to cause substantially the entirety of each partial beam generated by the respective emitter regions to proceed through a passage respectively associated with that partial beam. | 08-05-2010 |
| 20100202590 | X-RAY TUBE WITH A CATCHING DEVICE FOR BACKSCATTERED ELECTRONS, AND OPERATING METHOD THEREFOR - An x-ray tube has a cathode and a anode, and a catching device that captures backscattered electrons from the anode in the operating state of the x-ray tube. The catching device minimizes unwanted energy generation by the backscattered electrons in the catching device and the anode while maintaining a high quality of the focus by the catching device being electrically insulated with respect to the anode and the cathode and being placed at an electrical potential having a value between the value of the electrical potential of the anode and the value of the electrical potential of the cathode, and the amount of the difference between the potential of the catching device and the potential of the anode is in the range from 1% to 40% of the amount of the difference between the potential of the cathode and the potential of the anode. | 08-12-2010 |
| 20110014484 | ELECTRON ABSORBER LAYER - In a method for applying an electron absorber layer to a substrate, an electron absorber layer is produced from a composite material, by coating the substrate with a metallic material, and material inclusions made from an additional material are embedded in the metallic material during coating. The metallic material contains aluminum, magnesium, cobalt, iron, chromium, titanium, nickel, copper, or an alloy or mixture thereof. The additional material contains one or more of the following substances: boron, carbon or silicon, a mixture of these elements, one or more chemical compounds made from or having at least two of these elements, or a mixture of such chemical compounds. | 01-20-2011 |
| 20110038464 | X-RAY RADIATOR - An x-ray radiator has an x-ray tube with a vacuum housing arranged in a radiator housing in which a coolant circulates. The vacuum housing has a porous coating, at least at parts thereof, on surfaces facing the coolant. The heat transfer between the vacuum housing and the coolant is thereby improved, such that the x-ray radiator can be more highly thermally loaded. | 02-17-2011 |
