Q1-Q3 Cryostat Ideas

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Q1-Q3 Cryostat Ideas

Mike Anerella / Paul Kovach / Jesse Schmalzle

November 5, 2013

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Relevant prior experience (1)

For RHIC arc dipoles & LHC D1 dipoles, cold masses are supported on 2 plastic posts separated by heat shield intercept plates within cryostat

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Relevant prior experience (2)

• For RHIC e-Lens superconducting solenoid, for cost savings spare standard “CQS” cryostats were used

• Cold mass barely fit, centered inside cryostat→ vertical cylinders; “spool pieces” were added

to cryostat, downward from existing port locations, to house support posts

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RHIC e-Lens magnet details

• Blue = standard RHIC cryostat

• Orange = standard RHIC upper & lower plastic support posts

• Grey = cryostat cylinder extension & standard port cover

• Silver = heat shield plate & extension

cradle

upper post

lower post

heat shield plate

cryostat extensioncylinder

cryostat port cover

O-ring

O-ring

stainless backing ring

stainless backing ring

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application to Q1-Q3 (1)

Review ofLHC D2/D4 Assembly:• Single support post,

bolted to cradle• Heat shield plate

epoxied to post o.d.• Sliding, keyed

support inside post spacer

• Weight supported by post spacer, retaining ring

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application to Q1-Q3 (2)

Ø890 ID cryostat

Ø106 He II out (pumping line)

Ø35 Shield cooling

Cold mass cradle

“short” upper post

Heat shield plate

“standard” lower post

Cryostat extension cylinder

QXF Assembly

Post spacerShim, retaining ring

Ø630 cold mass

Upper post, heat shield detail

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Existing (BNL) LHC insertion tooling

Cold mass buildup area

Cryostat support / post installation area

Tooling removal area

• Tooling used for LHC D2, D3, D4 production at BNL (D1 used separate tooling)

• Cryostat support / post installation tooling provided by CERN (shortened to 10 m length at BNL)

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insertion tooling / assembly detail

Cold mass sled

Tow plate

Cryostat extension cylinder fits within

existing tooling clearance hole

Cold mass / upper post / heat shield slide into cryostat

Lower post is bolted to upper post, and post spacer, shim & retaining ring are installed while cold mass is held by

jack / hoists

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Summary

• Cold mass can be installed in preferred “downward offset” location with standard diameter cryostat

• “short” upper post and “standard” lower post permit assembly while reducing heat load

• Cryostat cylinder extension retains full function of existing design and fits within clearance of present (BNL) LHC insertion tooling

Alternately, if desired cryostat extension could be used with slightly increased diameter cryostat & centered cold mass to reduce heat load (also favorable due to saturation?)