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HTS for Upgrades: overview of test requirements

HTS for Upgrades: overview of test requirements. Amalia Ballarino, CERN. Review of superconductors and magnet laboratories, 19-05-09. A. Ballarino. HTS for Upgrades: on-going projects. New Inner Triplets Cold Powering: HTS link for the powering of NIT magnets

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HTS for Upgrades: overview of test requirements

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  1. HTS for Upgrades:overview of test requirements Amalia Ballarino, CERN Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  2. HTS for Upgrades: on-going projects • New Inner Triplets Cold Powering: HTS link for the powering of NIT magnets • (IR1 and IR5, Q1+Q2+Q3, D1, CP) • FP7, Work Package 7, Task 5: HTS Superconducting Links • Task coordinator: A. Ballarino (CERN) + • SOTON (Univ. Southampton, UK) • BHTS (Germany) • Columbus (Italy) • DESY (Germany) • FP7, Work Package 7, Task 4: HTS Insert Coils for High Field magnets • Task coordinator: P. Tixador (CNRS, Grenoble) Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  3. Conductor qualification: Ic(T,B), joints, mechanical properties, quench performance,… • Cable qualification: Ic(Top,Bop), mechanical properties, quench performance,… • Link/coil –system- qualification: Iop(Top,Bop), electrical and thermal performance, • quench protection,…. Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  4. HTS conductors * HTS coil: 7 T in a background field of 13 T HTS materials (BSCCO and YBCO) do not have isotropic properties Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  5. HTS link for NIT D1 Q3 Q2 Q1 Q1 Magnets Busbars in cryostats Nb-Ti to MgB2 joints (5 K) Cold power transfer system Link (5 to 15 K) MgB2 to Cu joints (15 K), Leads (20 to 300 K) & box Protection, energy extraction and power conversion

  6. MgB2 wire Measured by Columbus

  7. HTS link for NIT (ex. P5-R) Total length:  96 meters

  8. HTS link for NIT (ex. P5-R) Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  9. Tests on HTS link for NIT MgB2 conductor Phase 1 (2009-2010) : Test of strands, cables and sub-assemblies at 4.2 K (short samples -up to 1 m) Contact resistance (Cryolab, Block 4); Critical current (Block 4); Mechanical properties (Block 4); Quench characteristics. Test of strands and cables at intermediate temperatures (presently test facilities are not available at CERN) TOT = about 100 tests Phase 2 (2009-2011): Test of prototype link about 20 m long (SM-18) Thermal and electrical characteristics; Quench protection Phase 3 (2013): Test of final link in String Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  10. Test of prototype HTS link for NIT 1×14 kA 6 × 14 kA 6 × 2.5 kA 8 × 0.6 kA 1×2.5 kA Nb-Ti 1×0.6 kA MgB2 50-70 K He gas 5 K–3 bar He gas To cryo-recovery 4.5 K =0.22 m L20 m m(5 K) 0.5 g/s m(50 K-75 K)  1.5 g/s Review of superconductors and magnet laboratories, 18-05-09 A. Ballarino

  11. HTS link for FP7

  12. Tests on HTS link for FP7 MgB2, BSCCO and YBCO conductors Phase 1 (2010-2013) : Test of strands, cables and sub-assemblies at 4.2 – 77 K (short samples -up to 1 m length) Contact resistance; Critical current; Mechanical properties; Quench characteristics. TOT = about 100 tests Phase 2 (middle 2013 - 2014): Test of complete link about 20 m long (SM-18) Current capabilities; Thermal and electrical characteristics; Quench protection. Use of test station of link for NIT – but different temperatures of He gas. Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  13. Tests on HTS insert coils for FP7 Bi-2212 and YBCO conductors Phase 1 (2010-2013): Test of strands and cables at 4.2 K and in external field (short samples -up to 1 m) Critical current; Contact resistance Specification: 7 T in a background field of 13 T TOT = about 50 tests Phase 2 (2014): Test of insert coil – not included in FP7 Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

  14. Tests on HTS stacks for HTS leads Bi-2223 conductor Test of HTS stacks at liquid nitrogen temperature for integration in HTS leads (spare leads or new requirements, i.e. construction of new components) Ic measurements as for series of stacks in LHC HTS current leads Test station for LHC HTS current leads: besides the need for test of spares, we should have at CERN a test facility for testing HTS current leads of the LHC type (more than 3000 leads in the tunnel, of which about 1000 are HTS). Review of superconductors and magnet laboratories, 19-05-09 A. Ballarino

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