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Short introduction into the Superconductors Lab for the exchange program between

Short introduction into the Superconductors Lab for the exchange program between TE/MSC-SCD and TE/MSC-TF By Gerard Willering 11-05-2010. + About 3 technical students + About 5 doctoral students + 1 fellow + External In total about 28. TE-MSC-SCD Activities.

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Short introduction into the Superconductors Lab for the exchange program between

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  1. Short introduction into the Superconductors Lab for the exchange program between TE/MSC-SCD and TE/MSC-TF By Gerard Willering 11-05-2010

  2. + About 3 technical students + About 5 doctoral students + 1 fellow + External In total about 28

  3. TE-MSC-SCD Activities Superconducting materials and applications Experiments Characterize, test and analyze the performance of the materials developed and procured. Test stations Operate, maintain and develop test and characterization capabilities for superconducting wires, tapes, cables. Mandate Design, prototype and follow the production of superconducting wires, tapes and cables for magnets, and other electrical devices (bus bars, switches, current leads, power transmission and energy management systems, instrumentation).

  4. Examples of current Research, Technologies and Competences in the section Nb3Sn HTS Wires Stability ITER Cables LHC Current leads - BSSCO FRESCA II magnet FRESCA II magnet insert - YBCO LHC magnet upgrade Chemical composition Superconducting LINK - MgB2 Cabling Busbar interconnections Heat transfer through insulation Precision thermometry NbTi Fast Cycling Magnets Materials imaging with several tomography methods LHC reception tests (past) Cabling

  5. Station FReSCa (Facility for the Reception of Superconducting Cables) • Vertical double cryostat, height about 4 meter • Outer cryostat holds the dipole magnet (about 7 tonnes), always kept at LHe temperature • Inner cryostat (70 mm inner diameter) holds the sample. • Warm-up 15 hours, cool-down 5 hours.

  6. Flow scheme practical work Industry and collaborations Materials and cabling lab Building 103 HTS lab Building 288 Development and preparation of HTS cables and wires Preparation of cables Superconductors lab Building 163 Characterization and reception tests Further collaboration Knownledge exchange Magnet production Material development

  7. Superconductors Lab (163) Test stations • 7 wire test stations • Specifications • Up to 4 kA • Up to 15 T background field • Regulated temperature 1.8 and 4.3 K • Many types of sample holders • Test capabilities • Ic • RRR • Quench propagation • Magnetization • Strain dependence • Heat flow experiments • Special tests • FRESCA cable test station • Specifications • 32 kA • 10 T background dipole magnet • 1.8 K to 4.3 K • Many types of sample holders • 2 meter long samples • Test capabilities • Ic • RRR • Cable stability • Quench propagation • Strain dependence • Heat flow experiments • Special cable tests • - Interconnection tests • - Joint tests

  8. Sample holder and sample specifications for NbTi and Nb3Sn tests. Typical pressure up to 100 MPa are applied with screws. Design of a new sample holder with only thermal contraction to apply the pressure > 200 MPa. (necessary for Nb3Sn research)

  9. Interesting current measurements by Michielde Rapper on Nb3Sn- Critical current and Training • very little degradation vs. extracted strand (>1% on average) • unstable behavior at low field. • long training (30 quenches)

  10. Interconnection sample with shunts Interconnection sample with instrumentation New shunt and clamp design

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