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Hi-Lumi WP3 meeting

Update on the Q1 to D1 cryostatJan 28, 2014

Delio.

Ramo

s@ce

rn.ch

Outline Cryostat cross section options Elliptical interconnect sleeve feasibility Piping layout and longitudinal integration Summary

Del

io.R

amos

@ce

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h

Pipe specifications (from Oct 2013)

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Cryo spec* Possible standard dimensions MaterialOD thickness ID

HeII in (Y1) 12 copperHeII in (Y2) 12 copperHeII out (pumping line) 97 106 3 100 1.4432, weldedBS in (C') 20 23 1.5 20 1.4404, seamlessBS capillaries (4x) 6.5Quench return line 40 44.5 2 40.5 1.4404, seamlessShield in (E ) 30 35 2.5 30Shield out (F) 30 35 2.5 30Bayonet HX-1 68 copperBayonet HX-2 68 copper*by Rob Van Weelderen

Can the pumping line be

smaller now?

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Mike Ane

rella, N

ov

2013

Del

io.R

amos

@ce

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Increased diameter & centered cold mass

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!

Del

io.R

amos

@ce

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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

Del

io.R

amos

@ce

rn.c

h

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.

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Elliptical interconnect sleeve

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Del

io.R

amos

@ce

rn.c

h

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)

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Pipe routing - Some layout variants...

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Q1 Q2a Q2 b CPQ3 D1

Q1 Q2a Q2 b CPQ3 D1

Q1 Q2a Q2 b CPQ3 D1

A first guess for the 3 jumpers variant

10Split beamscreen loop in two?

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12

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Interconnect length with LHC QQS

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1125

Current HL-LHC layout interconnect length: 810 mm

Using the LHC quad QQS as reference

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~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.

Del

io.R

amos

@ce

rn.c

h

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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