Abstract: A superconducting very high field magnet coil with several solenoidal multi-layer coil sections which are wound in layers onto a hollow cylindrical support body (3) about a common central axis a, and which are electrically connected in series to carry a current in excess of 100 A is characterized in that the radially innermost coil section (1) comprises superconducting wire (2) which contains oxidic, high temperature superconductor (HTS) material, wherein the layers of the radially innermost coil section (1) are helically wound such that there is a free axial space between the walls, which is then sealed.

Abstract: The disclosure describes a circuit arrangement for driving an occupant protection system gas generator whose ignition process can be influenced by a magnetic field; this is based on a switching control principle, with the load coil generating the magnetic field being itself used as a component part of the switching control. For a fast reduction of the magnetic field and thus for accelerating the ignition process, a resistor may by connected into the free-wheeling branch, which is bridged in normal operation. Alternatively, it is possible to effect a return feed of the energy stored in the coil into the self-sufficiency capacitor.

Abstract: The invention concerns a magnet system (1) for charging of a superconducting magnet coil (3). The magnet system (1) is characterized by control means (4) for reading-in and controlling which read-in data of a storage medium (7) associated with the superconducting magnet (3) into a power supply (2) and which control the charging of the superconducting magnet coil (3) by the power supply (2) using the read-in data. The magnet system (1) facilitates a fully automatic, safe and rapid charging of a superconducting magnet coil (3) and guarantees better reproduceability and an optimal charging process.

Abstract: The invention concerns a superconducting magnet configuration for a high resolution NMR spectrometer which is highly stable over time and having a cryostat (21) with a vertical room temperature bore (23). A transverse access (32) through the cryostat (21) to the room temperature bore (23) is provided for at an easily accessible height directly above the upper end of the superconducting magnet coil (25) to substantially simplify the introduction of a sample. In a system having two helium tanks (26, 27), it is advantageous to have the access (32) arranged between these helium tanks.

Abstract: In a superconducting magnet coil configuration, in particular for a high resolution analytical nuclear resonance (NMR) spectrometer, with a cryostat having extremely low heat losses (low loss), comprising at least one essentially cylindrical container (1) with a vertical cylinder axis (k), with a vertical cylindrical room temperature bore (3) and with at least one inner tank (4) for a cryogenic liquid in thermal contact with a superconducting magnet coil (2) enclosing the room temperature bore (3), for generating a vertically directed, extremely homogeneous and stable magnetic field of high field strength inside a measuring volume of the room temperature bore (3), the vertical axes (r) of the room temperature bore (3) and of the superconducting magnet coil (2) run parallel to and at a distance from the vertical cylinder axis (k) of at least one of the cylindrical cryostat containers (1). In this way, access to the room temperature bore (3) is considerably simplified.

Abstract: A semi-automatic method is provided for finding an equation for a geometric surface patch that closely approximates a geometric surface within a digitized scene. By finding equations for patches within a scene, equations representing the entire scene can be found by stepwise sequential processing or alternatively by a system capable of parallel processing. Initially an operator using a mouse or pointing device selects a region from the digitized scene, and then selects one of a plurality of geometric surface types to represent a predominant geometric surface covered by the region. The process is based on randomly choosing the minimal number of data points from the selected region. Based on this information an equation of a surface on which the randomly selected points lie is determined. The process is repeated a predetermined number of times and the equation of the surface with the maximum number of associated data points is selected.

Abstract: A method is provided for identifying and locating curves within a digitized image. Digitized images are comprised of points which may represent curves stored as an array of binary coded elements in an memory device. Each addressable memory location in the array represents a single point or pixel. Particular curves within a scanned image are identified by randomly selecting a minimal subset of points which are necessary to generate a general equation for that curve; the equation along with a point on the curve is then used as in input parameter to an incremental curve generation routine which incrementally generates all points which are in a path along that curve. A comparison is made with scanned data to determine how many points exist along the path. This is repeatedly done until the curve with the greatest number of points is located.

Abstract: The invention concerns a superconducting high field magnetic coil for the production of magnetic field with one or more approximately rotationally symmetric hollow cylindrically shaped winding regions made from layers of windings of a superconducting wire through which current is flowing whereby in axial end regions of at least one winding region, radial components of the magnetic field are present which lead to axial Lorentz forces as well as to the accumulation of axial pressures in the winding layers. According to the invention, in the axial end regions of at least one winding region, the current density in at least one winding layer (S3, S4) is reduced relative to the normal current density present in the region bordering on the end region so that, thereby, the maximum Lorentz force occurring in these winding layers as well as the maximum occurring axial pressure is maintained within permissible limits.

Abstract: A superconductive magnet coil arrangement for generating a homogeneous magnetic field in a volume under examination, comprising a magnet coil having two first windings of a superconductive wire which are disposed adjacent the ends of the magnet coil and which are supported on a hollow supporting body, and comprising further at least one additional winding of a superconductive wire which is arranged in the area between the first windings and which is supported by the supporting body, is characterized by the fact that at least one of the additional windings is arranged on a winding core mounted on the supporting body and the fixation securing the winding against axial displacement occupies an area in length of the winding core shorter than the length of the winding arranged on the winding core. It is achieved in this manner that the pressure produced by Lorentz forces in the supporting body is kept off the rest of the winding.

Abstract: In an NMR magnet system for generating a highly homogeneous magnetic field of high field strength, with at least one superconducting magnet coil which is arranged in a first chamber of a cryostat in supercooled liquid helium at a temperature of less than 4.2K, with the cryostat having at least one further chamber containing liquid helium that is essentially at atmospheric pressure with a temperature of approximately 4.2K, the first chamber is connected to the further chamber in such a way that the supercooled liquid helium located in the first chamber is also essentially at atmospheric pressure. A refrigerator with which the liquid helium can be cooled to a temperature T<<4.2K, especially to T.apprxeq.1.8-2.3K, is provided in the first chamber.

Abstract: In a method and an apparatus for the precooling of a helium tank of a cryostat, in particular an optical cryostat with optical components in the helium tank, or an NMR cryostat, or a medical NMR cryostat for magnet resonance imaging, which accepts a superconducting magnet coil, a simple and cost effective precooling is achieved in that liquid nitrogen is directed out of a storage container under small overpressure via a conduit through an opening in the helium tank of a cryostat into a heat exchanger arranged in the helium tank and therefrom, by way of an opening, out of the cryostat and, finally, into a collecting container, in particular, into a nitrogen tank surrounding the helium tank.

Abstract: The invention relates to a web guide roller for a web which is required to be moved at a high speed, having cavities arranged on its surface for receiving the air carried with the moving web, whereby a finely branched network of compression chambers is arranged on the surface between plateau-like smoothly ground and polished areas on which the web lies in contact. Further the invention relates to a process for the production of this web guide rollers for use at high speed.