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Q1-Q3 Cryostat Ideas

Q1-Q3 Cryostat Ideas. Mike Anerella / Paul Kovach / Jesse Schmalzle November 5, 2013. 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. Relevant prior experience (2).

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Q1-Q3 Cryostat Ideas

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  1. Q1-Q3 Cryostat Ideas Mike Anerella / Paul Kovach / Jesse Schmalzle November 5, 2013

  2. 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

  3. 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

  4. RHIC e-Lens magnet details cradle upper post • Blue = standard RHIC cryostat • Orange = standard RHIC upper & lower plastic support posts • Grey = cryostat cylinder extension & standard port cover • Silver = heat shield plate & extension O-ring stainless backing ring heat shield plate stainless backing ring cryostat extension cylinder lower post O-ring cryostat port cover

  5. application to Q1-Q3 (1) • Review of • LHC 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

  6. application to Q1-Q3 (2) Ø106 He II out (pumping line) QXF Assembly Ø890 ID cryostat Ø630 cold mass “standard” lower post Cryostat extension cylinder Ø35 Shield cooling Cold mass cradle “short” upper post Heat shield plate Post spacer Shim, retaining ring Upper post, heat shield detail

  7. Existing (BNL) LHC insertion tooling Tooling removal area Cold mass buildup area Cryostat support / post installation 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)

  8. insertion tooling / assembly detail Cold mass / upper post / heat shield slide into cryostat Cold mass sled Tow plate Cryostat extension cylinder fits within existing tooling clearance hole Lower post is bolted to upper post, and post spacer, shim & retaining ring are installed while cold mass is held by jack / hoists

  9. 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?)

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