Bruker Eas Gmbh

Bruker Hts Gmbh

Bernd Sailer

Klaus Schlenga

Manfred Thoener

Vital Abaecherli

Matheus Wanior

André Aubele

Carl Buehler

Volker Gluecklich

Felicitas Tenbrink

Tabea Arndt

Martin Munz

Carl BÜHLER

Manfred THÖNER

Vital ABÄCHERLI

Volker Glücklich

A monofilament () for producing an NbSn-containing superconductor wire () includes a powder core () with an Sn-containing powder, a reaction tube () composed of an Nb alloy that includes Nb and at least one further alloy component X. The powder core is disposed within the reaction tube. The monofilament also includes at least one source () for at least one partner component Pk. A respective source includes one or more source structures at a unitary radial position in the monofilament. The alloy component X and the partner component Pk form precipitates XPk on reaction annealing of the monofilament in which Sn from the powder core and Nb from the reaction tube react to produce NbSn. The powder core is disposed in a moderation tube, which in turn is disposed within the reaction tube. This provides a monofilament for a powder-in-tube based NbSn-containing superconductor wire with improved current carrying capacity.

Monofilament for producing an NbSn-containing superconductor wire, especially for internal oxidation

A subelement () for an NbSn-containing superconductor wire includes

Subelement based on Nb-containing rod elements with powder-filled core tube for an NbSn-containing superconductor wire, and associated production method

For producing an Nb3Sn superconductor wire, restack rod process (RRP) subelements () are grouped to form a bundle having an approximately circular cross section and are arranged together with filling elements (-) in an internally and externally round outer tube (). To the inside the filling elements form a serrated profile () for abutment against the hexagonal subelements, and to the outside they form a round profile () for direct or indirect abutment in the outer tube. In fabricating the RRP subelements, and before a reshaping with a reduction in cross section, an externally hexagonal and internally round casing structure () is provided, into which the remaining parts of the subelements are inserted, in particular, an annular arrangement of hexagonal Nb-containing rod elements (), which are surrounded externally by an outer matrix () and internally by an inner matrix ().

Finished conductor arrangement for an NB3SN superconductor wire and method for producing a subelement for an NB3SN superconductor wire

A method for producing an at least two-part structure, such as a semifinished product for a superconducting wire is provided. A first structure and a second structure are separately produced, and the first structure and the second structure are then inserted one into the other. The first structure and the second structure are respectively produced in layers by selective laser melting or selective electron beam melting of a powder. The method produces two-part structures for semifinished products of superconducting wires.

Method for producing an at least two-part structure, in particular a semifinished product for a superconducting wire

A method for producing a semifinished product for a superconducting wire is provided herein. The semifinished product includes at least one NbTi-containing structure, such as a NbTi-containing rod structure. The NbTi-containing structure may be produced in layers by selective laser melting or selective electron beam melting of a powder that contains Nb and Ti. In the production of at least some layers of the NbTi-containing structure, during the production of an irradiated area provided for a material deposition of a respective layer, at least one process parameter of the selective laser melting or electron beam melting is varied in one or a plurality of first zones of the irradiated area as compared to one or a plurality of second zones of the irradiated area. The present techniques simplify introduction of artificial pinning centers into the NbTi-material of a superconducting wire or a semifinished product for such a superconducting wire.

Method for producing a semifinished product for a superconducting wire

A semifinished wire () for a superconducting wire containing Nb3Sn has a Cu stabilization cladding tube (), a ring-shaped closed diffusion barrier () in the inside of the Cu stabilization cladding tube () and a plurality of PIT elements () in the inside of the diffusion barrier (), each having a cladding () containing Cu, a small tube (), and a powder core () containing Sn. The small tube () consists of Nb or an alloy containing Nb and the diffusion barrier () has a percentage of area ADF in cross-section of the semifinished wire () of 3% ADF 9% and a wall thickness WDF with 8 &#x3bc;m&#x2266;WDF&#x2266;25 &#x3bc;m. A plurality of filler elements () are arranged inside the diffusion barrier (), with the inner sides of the filler elements () abutting the PIT elements ().

Semifinished wire with PIT elements for a superconducting wire containing Nb3Sn and method of producing the semifinished wire

A method for superconductingly connecting two or more wires (), each comprising at least one filament (-) that contains MgBor a mixture of Mg and B, wherein a superconducting connection is realized through exposed end regions () of the filaments (-) via an MgBmatrix, is characterized in that a bulk boron powder () is provided into which the exposed end regions () of the filaments (-) of the wires () project, the boron of the bulk boron powder () being present in amorphous modification. The bulk powder () is then compacted together with the projecting exposed end regions () of the filaments () to form a compressed element () and the compressed element () is infiltrated with molten magnesium () from the surface () of the compressed element (). The method improves the quality, in particular, the current-carrying capacity and the critical magnetic field strength of a superconducting connection of MgBsuperconducting wires.

Method for superconducting connection between MgB2 superconducting wires via a MgB2 matrix made from a boron powder compressed element infiltrated with Mg

A method for connecting two or more superconducting wires (), each comprising at least one filament (-) that contains MgB, wherein the superconducting connection is realized through exposed end regions () of the filaments (-) via a superconducting matrix, is characterized in that a bulk powder () of a high-temperature superconductor (HTS) powder with a transition temperature of T&#x3e;40K is provided, into which the exposed end regions () of the filaments (-) project, wherein the Boron of the Boron powder of the bulk powder () is in amorphous modification, and the bulk powder () is compacted together with the projecting exposed end regions () of the filaments (-) to form a compressed element (). The method improves the quality, in particular, the current carrying capacity and the critical magnetic field strength of a superconducting connection of two MgBwires.

Superconducting connection between MgB2 superconducting wires via a compressed element made from HTS powder

A current lead () for connecting a superconducting load system (), in particular, a magnet coil, to a current feed point () that is at a higher temperature than the load system () comprises a flat, elongated carrier () and a plurality of mechanical and electrical parallel high-temperature superconductors (HTSC) (), wherein the HTSCs () are disposed side by side on the carrier (). The carrier () is made of stainless steel, and a plurality of HTSCs () are each disposed side by side on two opposite carrier () sides of the carrier. The carrier () is constituted in the shape of a plate with cut-outs (-). The current lead has a high current capacity and low thermal conductivity and provides improved emergency conduction properties in case of failure of the superconductivity in the HTSC.

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Alzenau, Germany

Bernd Sailer