Abstract: A measurement current (i) is injected into an active part (4) of an HTS superconductor. The active part is cooled, but not reservoirs (1, 2) from/to which the superconductor is wound. Only a fraction of the active part is exposed to a magnetic field for testing the electrical properties of the superconductor. Buffer devices (20a, 20b) prevent current sharing from outside the active part. The measurement current is injected where the residual magnetic field is at least 3 times lower than the magnetic field for testing, and/or the local critical current at the current injection locations is at least three times higher than the critical current at the magnetic field for testing. The electrical properties, e.g. the critical current, are tested by determining an integral of a voltage drop (U) across the active part, e.g. between two voltage pick-up elements (15a, 15b), as a function of measurement time (?).

Abstract: A method for depositing film on a substrate (16) through pulsed laser deposition, which includes: generating at least two pulsed laser beams (4, 5, 6) with at least one laser (1), and directing the at least two laser beams (4, 5, 6) to different target spots (9, 10, 11) of a target (12), whereby the target (12) is ablated and at least two plasma plumes (13) are created. The plasma plumes (13) create a flow of target material towards the substrate (16) and the target material is deposited onto the substrate (16) at a deposition area (24). The plasma plumes (13) created by the at least two laser beams (4, 5, 6) are spatially and temporally superimposed, and the target spots (9, 10, 11) are separated from each other at a distance that allows a gas-dynamical interaction of the created plasma plumes (13).

Abstract: A method for manufacturing an HTS coated tape (34) includes providing a substrate tape (1), depositing a textured buffer layer (3) onto a front side (7) of the substrate tape, depositing an HTS layer (32) onto the front side, and depositing a functional layer (2) onto a bottom side (6) of the substrate tape. The functional layer exerts a mechanically deforming effect on the substrate tape opposing a mechanically deforming effect on the substrate tape exerted by the textured buffer layer deposited on the front. The functional layer is at least partially deposited before and/or during the depositing of the textured buffer layer. This permits an HTS coated tape, with which higher critical currents of the HTS layer are achieved, to be produced.

Abstract: A tape type superconductor (1), extending in longitudinal direction (LD), includes a substrate tape (2), at least one buffer layer (3), a superconductor layer (4), and plural elongated barrier structures (5, 5a, 5b). The superconductor layer has a width WSL in a direction (WD) that is perpendicular to the longitudinal direction and runs parallel to a flat side (8) of the substrate tape. The tape type superconductor has a longitudinal length LTTS t, and the elongated barrier structures are oriented in parallel with the longitudinal direction. A respective barrier structure has a longitudinal length LBS, with LBS?0.20*WSL and LBS?0.20*LTTS. The barrier structures are distributed longitudinally, are located at least partially in the superconductor layer, and impede a superconducting current flow in width direction across a respective barrier structure. This tape type superconductor achieves high critical currents simply and over extended tape lengths with suppressed magnetization.

Abstract: A superconductor structure (10, 20, 30), having a first strip piece (1), a second strip piece (2) and a third strip piece (3). Each strip piece has a substrate (5) and a superconducting layer (6) deposited thereon. End sections of the second and third strip pieces are connected via a layer (7) made of a first normally conducting material to the first strip piece, the second and third strip pieces overlap with the first strip piece, the superconducting layers of the second and third strip pieces face the superconducting layer of the first strip piece, and a seam (4, 23, 24) with a defined path length is formed between the end sections of the second and third strip pieces. The seam extends over an extension region (8) of the superconductor structure. Splicing strip pieces together in this manner achieves a high current load capacity.

Abstract: A superconductor structure (10, 20, 30), having a first strip piece (1), a second strip piece (2) and a third strip piece (3). Each strip piece has a substrate (5) and a superconducting layer (6) deposited thereon. End sections of the second and third strip pieces are connected via a layer (7) made of a first normally conducting material to the first strip piece, the second and third strip pieces overlap with the first strip piece, the superconducting layers of the second and third strip pieces face the superconducting layer of the first strip piece, and a seam (4, 23, 24) with a defined path length is formed between the end sections of the second and third strip pieces. The seam extends over an extension region (8) of the superconductor structure. Splicing strip pieces together in this manner achieves a high current load capacity.

Abstract: An apparatus (1) for current conditioning, having—a primary coil (2) of electrically conducting material, and—a plurality of secondary coils (3, 3a-3l) of superconductor material, with the secondary coils inductively coupled to the primary coil, wherein at least a part of the secondary coils are arranged laterally shifted to each other with respect to a direction (18) of a primary magnetic flux (20) of the primary coil. At least a part of the secondary coils are arranged axially shifted to each other with respect to the direction (18) of a primary magnetic flux (20) of the primary coil (2). At least for the part of the secondary coils that are laterally shifted to each other, electrically insulating material (5) is provided between the secondary coils. The current conditioning apparatus allows a smoother increase of the inductance of the primary coil when the primary current increases.

Abstract: An NMR spectrometer (131) with an NMR magnet coil (91) having windings of a conductor with a superconducting structure (1), which have a plurality of band-segments (2, 2a, 7a-7e, 8a-8d, 15) made of band-shaped superconductor. Each band-segment (2, 2a, 7a-7e, 8a-8d, 15) has a flexible substrate (3) and a superconducting layer (4) deposited thereon, wherein the band-segments (2, 2a, 7a-7e, 8a-8d, 15) each have a length of 20 m or more. At least one of the band-segments (2, 2a, 7a-7e, 8a-8d, 15) forms a linked band-segment (2, 2a), and each linked band-segment (2, 2a) is connected to at least two further band-segments (7a-7e) in such a way that the combined further band-segments (7a-7e) overlap with at least 95% of the total length (L) of the linked band-segment (2, 2a). The magnet coil generates particularly high magnetic fields in a sample volume and has a low drift.

Abstract: A method for depositing a high temperature superconductor (=HTS) onto a tape (2), in particular by pulsed laser deposition (=PLD). The tape is wound off a source reservoir (3), heated and transported through a deposition zone (21), and wound up at a target reservoir (5). HTS material (32) is deposited onto the heated transported tape in the deposition zone, and the tape is led through the deposition zone by a guide structure (4). During deposition of the HTS material, the source reservoir, the guide structure and the target reservoir are rotated around a common rotation axis (9), such that parts of the tape rotating along with the guide structure repeatedly cross the deposition zone. This permits depositing a HTS onto a tape, in particular by PLD, which allows a high quality of the deposited HTS material for long tape lengths.

Abstract: A method for depositing film on a substrate (16) through pulsed laser deposition, which includes: generating at least two pulsed laser beams (4, 5, 6) with at least one laser (1), and directing the at least two laser beams (4, 5, 6) to different target spots (9, 10, 11) of a target (12), whereby the target (12) is ablated and at least two plasma plumes (13) are created. The plasma plumes (13) create a flow of target material towards the substrate (16) and the target material is deposited onto the substrate (16) at a deposition area (24). The plasma plumes (13) created by the at least two laser beams (4, 5, 6) are spatially and temporally superimposed, and the target spots (9, 10, 11) are separated from each other at a distance that allows a gas-dynamical interaction of the created plasma plumes (13).

Abstract: A superconducting element (1) has a metallic substrate (2), an insulating layer (3), a superconductor layer (5) and a metallic protective layer (6), wherein the insulating layer (3) is arranged between the substrate (2) and the superconductor layer (5). In cross-section of the superconducting element (1), the insulating layer (3) extends at both ends past the area (BSL) of the substrate (2) covered by the superconductor layer (5) to galvanically separate the superconductor layer (5) and the metallic protective layer (6) from the substrate (2). The thickness D of the insulating layer (3) is selected in such a fashion that the superconducting element (1) has a transverse breakdown voltage between the metallic substrate (2) and both the superconductor layer (5) as well as the metallic protective layer (6) of at least 25 V. The superconducting element has a reduced risk of being damaged in case of a quench.

Abstract: A method for operating a superconducting device (1; 1a, 1b), having a coated conductor (2) with a substrate (3) and a quenchable superconducting film (4), wherein the coated conductor (2) has a width W and a length L, is characterized in that 0.5?L/W?10, in particular 0.5?L/W?8, and that the coated conductor (2) has an engineering resistivity ?eng shunting the superconducting film (4) in a quenched state, with ?eng>2.5 ?, wherein RIntShunt=?eng*L/W, with RIntShunt: internal shunt resistance of the coated conductor (2). The risk of a burnout of a superconducting device in case of a quench in its superconducting film is thereby further reduced to such an extent that the device can be operated without use of an additional external shunt.

Abstract: An NMR spectrometer (131) with an NMR magnet coil (91) having windings of a conductor with a superconducting structure (1), which have a plurality of band-segments (2, 2a, 7a-7e, 8a-8d, 15) made of band-shaped superconductor. Each band-segment (2, 2a, 7a-7e, 8a-8d, 15) has a flexible substrate (3) and a superconducting layer (4) deposited thereon, wherein the band-segments (2, 2a, 7a-7e, 8a-8d, 15) each have a length of 20 m or more. At least one of the band-segments (2, 2a, 7a-7e, 8a-8d, 15) forms a linked band-segment (2, 2a), and each linked band-segment (2, 2a) is connected to at least two further band-segments (7a-7e) in such a way that the combined further band-segments (7a-7e) overlap with at least 95% of the total length (L) of the linked band-segment (2, 2a). The magnet coil generates particularly high magnetic fields in a sample volume and has a low drift.

Abstract: An inductive fault current limiter (1) has a normally conducting primary coil assembly (2) with a multiplicity of turns (3) and a superconducting, short-circuited secondary coil assembly (4), wherein the primary coil assembly (2) and the secondary coil assembly (4) are at least substantially coaxial with respect to each other and at least partially interleaved in each other. The primary coil assembly (2) has a first coil section (2a) and a second coil section (2b), wherein the turns (3) of the first coil section (2a) of the primary coil assembly (2) are disposed radially inside the secondary coil assembly (4) and the turns (3) of the second coil section (2b) of the primary coil assembly (2) are disposed radially outside the secondary coil assembly (4). The fault current limiter has an increased inductance ratio.

Abstract: A superconducting structure (1) has a plurality of linked band-segments (2), with each linked band-segment (2) having a substrate (3) and a superconducting layer deposited onto it (4). The linked band-segments (2) are joined to one another by superconducting layers (4) that face each other. Each linked band-segment (2) is joined to two additional band-segments (7a, 7b) in such a way that the superconducting layers (4) of the two additional band-segments (7a, 7b) and of the linked band-segment (2) face each other. The additional band-segments (7a, 7b) together substantially overlap the total length (L) of the linked band-segment (2). This provides for a superconducting structure, which exhibits high superconductivity and which is very suitable for long distances.

Abstract: A method for operating a superconducting device (1; 1a, 1b), having a coated conductor (2) with a substrate (3) and a quenchable superconducting film (4), wherein the coated conductor (2) has a width W and a length L, is characterized in that 0.5?L/W?10, in particular 0.5?L/W?8, and that the coated conductor (2) has an engineering resistivity ?eng shunting the superconducting film (4) in a quenched state, with ?eng>2.5?, wherein RIntShunt=?eng*L/W, with RIntShunt: internal shunt resistance of the coated conductor (2). The risk of a burnout of a superconducting device in case of a quench in its superconducting film is thereby further reduced to such an extent that the device can be operated without use of an additional external shunt.

Abstract: A superconducting device (1) has an elongated coated conductor (2), with a substrate (3) and a quenchable superconducting film (4), wherein the elongated coated conductor (2) has a width W, and an external shunt system (5), with bridge contacts (6; 6a, 6b), electrically connected to the superconducting film (4), and a resistive member (7), thermally insulated from the coated conductor (2) and electrically connected to the bridge contacts (6; 6a, 6b). The device is is characterized in that the bridge contacts (6; 6a, 6b) along the elongated coated conductor (2) have a spacing SP with SP?8*W. The device reduces the risk of a burnout of a superconducting device in case of a quench in its superconducting film.

Abstract: A superconducting structure (1) has a plurality of coated conductor tapes (2; 2a-2o), each with a substrate (3) which is one-sided coated with a superconducting film (4), in particular an YBCO film, wherein the superconducting structure (1) provides a superconducting current path along an extension direction (z) of the superconducting structure (1), wherein the coated conductor tapes (2; 2a-2o) provide electrically parallel partial superconducting current paths in the extension direction (z) of the superconducting structure (1), is characterized in that the coated conductor tapes (2; 2a-2o) are superconductively connected among themselves along the extension direction (z) continuously or intermittently. A more stable superconducting structure with which high electric current strengths may be transported is thereby provided.

Abstract: An inductive fault current limiter (1), has a normally conducting primary coil assembly (2) with a multiplicity of turns (3), and a superconducting, short-circuited secondary coil assembly (4). The primary coil assembly (2) and the secondary coil assembly (4) are disposed at least substantially coaxially with respect to each other and at least partially interleaved in each other. The secondary coil assembly (4) has a first coil section (4a) disposed radially inside the turns (3) of the primary coil assembly (2) and a second coil section (4b) disposed radially outside the turns (3) of the primary coil assembly (2). The fault current limiter has an increased inductance ratio.

Abstract: A superconducting element (1) has a metallic substrate (2), an insulating layer (3), a superconductor layer (5) and a metallic protective layer (6), wherein the insulating layer (3) is arranged between the substrate (2) and the superconductor layer (5). In cross-section of the superconducting element (1), the insulating layer (3) extends at both ends past the area (BSL) of the substrate (2) covered by the superconductor layer (5) to galvanically separate the superconductor layer (5) and the metallic protective layer (6) from the substrate (2). The thickness D of the insulating layer (3) is selected in such a fashion that the superconducting element (1) has a transverse breakdown voltage between the metallic substrate (2) and both the superconductor layer (5) as well as the metallic protective layer (6) of at least 25 V. The superconducting element has a reduced risk of being damaged in case of a quench.