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Cold Powering System for Hi-Luminosity A. Ballarino CERN, Geneva

Cold Powering System for Hi-Luminosity A. Ballarino CERN, Geneva Technical Meeting on Vacuum for HL-LHC 5 th March 2014. Outline. System overview Where in LHC and Why Status of development Project timeline Milestones and integration in the LHC machine Conclusions.

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Cold Powering System for Hi-Luminosity A. Ballarino CERN, Geneva

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  1. Cold Powering System for Hi-Luminosity A. Ballarino CERN, Geneva Technical Meeting on Vacuum for HL-LHC 5th March 2014

  2. Outline • System overview • Where in LHC and Why • Status of development • Project timeline • Milestones and integration in the LHC machine • Conclusions A. Ballarino, 05/03/2014

  3. Where in the LHC ? CMS P5 P5 P4 P4 P6 P6 P3 P3 Not only powering of the Hi-Lumi Triplets P7 P7 P2 P2 Betatron Cleaning Collimators P8 P8 P1 P1 ATLAS A. Ballarino, 05/03/2014

  4. Distribution Feedboxes removed from LHC Tunnel A. Ballarino, 05/03/2014

  5. Interventions at P7, P1 and P5 P7: Removal of DFBA (2) and DFBM (2) P1 and P5: removal of DFBX (2 per point) Baseline for Hi-Lumi Triplets P1 and P5: removal of DFBA (2 per point) and DFBL (2 per point) A. Ballarino, 05/03/2014

  6. LHC P7 Current Leads and Power Converters ~ 250 m ~ 250 m TZ76 UJ76 LHC P7: Cleaning Insertions R771 Underground Installation A. Ballarino, 05/03/2014

  7. Superconducting Link at LHC P5 2150-200 kA A. Ballarino, 05/03/2014

  8. Superconducting Link at LHC P1  80 m LHC Tunnel Integration drawings by J.P. Corso and S. Weisz A. Ballarino, 05/03/2014

  9. LHC P1: Surface Buildings Shaft PM15 Integration drawings by J.P. Corso and S. Weisz A. Ballarino, 05/03/2014

  10. Superconducting Links Characteristics (1/2) LHC P7 2 Links, Each  500 m long 50 Cables per link rated at 600 A Itot= 30 kA Removal of LHC cryostats from tunnel Underground installation 2 P5 LHC P1 and P5 2+2 Links, Each  300 m long 42 Cables per link rated at up to 20 kA Itot= 150 kA Upgrade of Hi-Luminosity Triplets Surface Installation P7 2 2 P1 A. Ballarino, 05/03/2014

  11. Superconducting Links Characteristics (2/2) LHC P1 and P5 2+2 Links, Each  300 m long 63 Cables per link rated at up to 6 kA Itot= 200 kA Removal of LHC cryostats from tunnel Feeding of Arc and MSs magnets Surface Installation P5 2 + 2 P7 2 + 2 P1 In total: 10 SC Links Multi-circuit assemblies feeding different magnet circuits 2 Total length of superconductor required > 1000 km(7 tons) A. Ballarino, 05/03/2014

  12. High-Current Rating, LHC P1 and P5 Hi-Lumi Triplets Cu MgB2 ,  = 0.85 mm 18 MgB2 wires  = 6.5 mm 20 kA Six cables,  = 19.5 mm Concentric  3 kA Seven cables,  = 8.4 mm 0.4 kA Four cables 0.12 kA Eighteen cables ext  65 mm A. Ballarino, 05/03/2014

  13. Cable for Hi-Luminosity Magnets LHC P1 and P5 H=80 m L 24 cm Itot= 150 kA Mass  11 kg/m (880 kg for H=80 m) RB1.5 m Semi-flexible cryostat external diameter = 220 mm A. Ballarino, 05/03/2014

  14. Superconducting Link Cooling Cryostat with current leads 3 Surface or TZ 76 (P7) T  25 K 1-2-3: Vacuum Insulation Interface in the tunnel 2  5 K Tunnel 1.9 K 1 Maximum operating temperature of the cables = 25 K He gas cooling Operation in self-field (B <1 T) A. Ballarino, 05/03/2014

  15. In the tunnel Nb-Ti to HTS connections Cryogenic supply E. Todesco A. Ballarino, 05/03/2014

  16. At the surface or in TZ 76 New concept: no DFB cryostat Conceptual design at the University of Southampton, Task 3 of WP 6 A. Ballarino, 05/03/2014

  17. L = 20 m H  4 m

  18. Timeline Today: Development and test of 20 kA @ 24 K MgB2 SC-Link 20 m long Series P1 and P5 Series P7 SC Links at LHC P1 and P5 SC Links at LHC P7 2016 2013 2015 2018 2014 2017 2023 Test of horizontal lines Test of vertical lines A. Ballarino, 05/03/2014

  19. S. Chemli, 26/11/2013

  20. Thanks for your attention

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