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SCT HEX PRR (13-4-05)

SCT HEX PRR (13-4-05). Layout & Installation of Barrel off-detector HEX circuits From barrel cooling loop to PPB1 Barrel Hex is a plain (non-coiled inlet tube) layout, 1.5m active length

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SCT HEX PRR (13-4-05)

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  1. SCT HEX PRR (13-4-05) Layout & Installation of Barrel off-detector HEX circuits From barrel cooling loop to PPB1 • Barrel Hex is a plain (non-coiled inlet tube) layout, 1.5m active length • 44 (with 11 sub-types, defined by angle of pipes only) barrel HEXs are required for installation in ATLAS during early 2006 • Basic design layout is covered on drawing no O-TB-0049-741 (ATLICIS__0098) • Overall design, manufacturing drawings and tooling by Paul Barclay, RAL • First assembly drawing is TD-1056-501 • HEX assembly, testing and cleaning by QMUL group CLRC

  2. SCT HEX PRR (13-5-05) Overall Barrel HEX layout – Drg no 0-TB-0049-741 ( ATLICIS__0098) Capillary layout Inlet-cap connection Heater Interconnect Inlet PPB1 TE Bulkhead PPB1 TE bulkhead Exhaust Connection (PPF0 equivalent) Outlet PPB1 Heater Outer connection CLRC PPB1

  3. SCT HEX PRR (13-4-05) PHI distribution of HEXs Drawings are in CDD: Side A – ATLICIS__0096 Side C – ATLICIS__0097 HEX trays have been Installed already in cryosat July 2004 4 Bunches of 5 or 6 HEXs Per side CLRC

  4. SCT HEX PRR (13-4-05) Inlet PPB1 region Heater outer connection Al Bulkhead Attached to existing Cable tray PPB1 Serto couplings Note – Serto st/stl couplings are standard Where possible for ID fluid connections CLRC

  5. SCT HEX PRR (13-4-05) Heater interconnect region PPB1 Inlet tubes Pre-installed Exhaust heater Electrical Isolator Commercial ceramic 2:1 inlet manifold HEX body Custom HEX-Heater Connector CLRC

  6. SCT HEX PRR (13-4-05) Inlet-Capillary joint Layout of capillary TE bulkhead Capillary On-barrel cooling loop Space to store Spare capillary Length Demountable exhaust connections Exhaust ‘spider’ Nominal capillary dimensions: ID 0.8mm, length 800mm, WT 0.2mm CLRC

  7. SCT HEX PRR (13-4-05) • Practical aspects of installation: • The HEX is large (2.5*0.7m and it has no intentionally flexible parts • It has to be installed between three points: the TE bulkhead, which cannot move, the heater, which has limited movement in Z only and the inlet PPB1, which can move in Z • Main problem is we will not know exactly where the TE bulkhead will be until the barrel installation is done, but we have +/-2.5mm scope for positioning the HEX in R only • So we will ‘plan for success’ by making the HEXs to size and assuming that the above conditions will apply, but • We must have a contingency in case we get in a mess……. • This is what we will do: CLRC

  8. SCT HEX PRR (13-4-05) First step is to make a HEX template that is non- Functional, but accurate, then try it on the UCL Mock-up. This can probably be done within the next two Months. HEX service tray will be required Cryostat TRT Crack region TE bulkhead CLRC

  9. SCT HEX PRR (13-4-05) Second step is to try the template on the final barrel installation And use it as a gauge to compare the real HEXs Third step – in case we need to, the indium flange ‘A’ on the HEX Exhaust tube can be de-soldered and re-positioned on the tube The flange has sufficient length of engagement with the tube to Allow this. If we do this, the final leak test will have to be Re-done, so we need to make allowances For this A A Note – the exhaust ‘spiders’ and inlet capillaries Will be pre-installed as part of the 4-B assembly In 2005 CLRC

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