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Hi-Lumi WP3 meeting Update on the Q1 to D1 cryostat Jan 28, 2014

Hi-Lumi WP3 meeting Update on the Q1 to D1 cryostat Jan 28, 2014. Outline Cryostat cross section options Elliptical interconnect sleeve feasibility Piping layout and longitudinal integration Summary. Delio.Ramos@cern.ch. Pipe specifications (from Oct 2013).

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Hi-Lumi WP3 meeting Update on the Q1 to D1 cryostat Jan 28, 2014

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  1. Hi-Lumi WP3 meeting Update on the Q1 to D1 cryostat Jan 28, 2014 • Outline • Cryostat cross section options • Elliptical interconnect sleeve feasibility • Piping layout and longitudinal integration • Summary Delio.Ramos@cern.ch

  2. Pipe specifications (from Oct 2013) Can the pumping line be smaller now?

  3. Mike Anerella, Nov 2013

  4. Maximum transport width in the tunnel is 1250 mm, simulation needed (C. Bertone) • Simplest cryostat shape • Short support post → higher heat load • Piping integration ok! Increased diameter & centered cold mass

  5. Elliptical cryostat • Simplified piping integration • Standard transport width • Standard support post • Interconnect sleeve is the main challenge (in contact with industry) • Cold mass can be centered

  6. Integration in the tunnel: large cylindrical vs elliptical • On integration CAD models both cylindrical and elliptical versions seam ok (C. Collazos) . Elliptical has the advantage of easier access for personnel on the sides.

  7. Elliptical interconnect sleeve

  8. Komplaflex feasibility study and cost estimation • 2 mm thick shell • Flexibility +/-5 mm axial and transverse • Buckling safety factor 4.9 • Cost (Offer from Kompaflex) • 16 kCHF tooling (one-off) • 6.7 kCHF/unit (on a basis of 25 unit order) • For comparison, cost of standard interconnect sleeves • 2.1 kGBP/unit (price 2000-2001, LHC series)

  9. Pipe routing - Some layout variants... Q1 Q2a Q2 b Q3 CP D1 Q1 Q2a Q2 b Q3 CP D1 Q1 Q2a Q2 b Q3 CP D1

  10. A first guess for the 3 jumpers variant Split beamscreen loop in two?

  11. Interconnect length with LHC QQS 1125 Current HL-LHC layout interconnect length: 810 mm

  12. Using the LHC quad QQS as reference ~630 ~430 LHC QQS length determined by the phase separator. Eventual gain with smaller phase separator ~200 mm, i.e. IC length becomes 925 mm.

  13. Summary • 3 vacum vessel cross sections on the table: ID 890, ID 985, elliptical 890 by ~1112 • Elliptical vessel: Interconnect sleeve is technically feasible at a reasonable cost • Assuming relatively small volume phase separators, the interconnect length is determined by the jumper diameter. We need: • First draft of piping diagrams (how many pipes in the jumper and inside the cryostat) • Hydraulic cross sections (how big are such pipes) • What can we do to simplify fabrication/ assembly/ interchangeability? • Phase separators even were they are not needed? More space required • Minimise the number of jumpers? More pipes along the cryostat cross section • Additional pipes for busbars?

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