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Status of DFA + link to Q6 in point 7

Status of DFA + link to Q6 in point 7. Outline Naming Visit to point 7 Base concept and approach Time scale. Délio Ramos, WP6 meeting, 5.3.2014. Naming Proposal. Sami Chemli. DFHA [A-H] (or [A-P]?) DFHM idem DFHX [A-D]. DSH A [A-F] B [A-F] C [A-B] D [A-D] E [A-F] F [A-D]

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Status of DFA + link to Q6 in point 7

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  1. Status of DFA + link to Q6 in point 7 Outline • Naming • Visit to point 7 • Base concept and approach • Time scale Délio Ramos, WP6 meeting, 5.3.2014 WP6 Meeting

  2. Naming Proposal Sami Chemli DFHA [A-H] (or [A-P]?) DFHM idem DFHX [A-D] DSH A [A-F] B [A-F] C [A-B] D [A-D] E [A-F] F [A-D] G [A-B] H [A-F] DSH DSL (as today, extended for D2?) DFA [A-P] DFM [A-P] DFX [A-H] In point 7 the DFM function may be integrated into the DFA WP6 Meeting

  3. Point 7 Left Site visit organised by J-P Corso, 26.11.2013 DFBA WP6 Meeting

  4. Point 7 Left Site visit organised by J-P Corso, 26.11.2013 DFBM Resistors Short link DFBM-Q6 Shielding WP6 Meeting

  5. Current Base concept (all sites) Udo Wagner • The 17 K limit for the MgB2 link allows only the 5 K, 3.5 bar helium from line C as coolant. • The link will be cooled by helium gas created by evaporating the liquid helium in the spice box. • Thermal shield solution not shown. • Either with 20 K, or with 70 K gas. Helium at max. 17 K Helium from line C WP6 Meeting

  6. Minimum change approach WP6 Meeting • Minimise work in the tunnel • Assemble and test before LS2 starts • Aim for installation within short time slot (radiation cooldown time may be long..) • Remove HCM only and replace with DFA • Keep 2x13 kA leads in current position • Keep cryo jumper in current position • Vertical link connection • Keep existing support beam and shuffling module • Remove DFBMH and link Q6 to DFA • Possibly with no changes to Q6 QQS and jumper • Link routed above QRL

  7. Point 7 Left ST0053741_13 LHCDFBM_0003 LHCDFBA_0010 WP6 Meeting

  8. Point 7 Right ST0296494_07 LHCDFBM_0003 LHCDFBA_0010 WP6 Meeting

  9. DFA to Q6 in NbTi Supercritical He because of changes in level 52x600 A 4x600 A Keep jumper and 13 kA leads in same location to avoid changes in power cables and cryo distribution Splice 48x600 A WP6 Meeting

  10. Implementing a DSL inspired solution for the link to Q6 Supercritical He cooled, NbTi link Outlet from link expanded in DFA to produce saturated liquid WP6 Meeting

  11. Matching section IR7 left Replace To shield links For Q6 link, 13 kA and MgB2 remove New module must have line E and CL WP6 Meeting

  12. DFBAM 7 Left Inlet for shield of arc cryostat Supply to 1.9 K static bath WP6 Meeting

  13. DFBMH For Q6 link, 13 kA and MgB2 To shield links WP6 Meeting

  14. Link shield 20 K inlet with existing jumpers and valves MgB2, 52x600A +spares? NbTi, 4x600A NbTi, 48x600A N line, 1.9 K Q6, 4.5 K M line, 1.9 K MgB2-NbTi splices WP6 Meeting

  15. Link shield 70 K inlet N line, 1.9 K Q6, 4.5 K M line, 1.9 K WP6 Meeting

  16. Typical time scale WP6 Meeting • From an established concept to ready for tendering documentation: 1 year (usually more...) • Tendering: 6 months • Fabrication: 1 year • Ready for installation: + 6 months (possibly more if cold tested) • i.e. 3 years minimum • We should start now: • Agree on the cooling scheme • Validate integration in the tunnel (links and DFA) • Determine piping dimensions and extent of modifications to QRL and Q6 • Start the DFA and Q6 link mechanical design

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