Neutrino Factory Target Cryostat Review Van Graves Cale Caldwell IDS-NF Phone Meeting August 10, 2010.

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Presentation transcript:

Neutrino Factory Target Cryostat Review Van Graves Cale Caldwell IDS-NF Phone Meeting August 10, 2010

2Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Iron Plug Proton Beam Nozzle Tube SC-1 SC-2 SC-3SC-4 SC-5 Window Mercury Drains Mercury Pool Water-cooled Tungsten Shield Mercury Jet Resistive Magnets Neutrino Factory Study 2 Target Concept ORNL/VG Mar2009 Splash Mitigator General Target Concept – Downstream Mercury Drain

3Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 General Target Concept – Upstream Mercury Drain

4Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 NF Cryostat with Tapered Shielding Taper matches capture field No shielding under mercury Straight W-C bore up to beam window to allow removal of mercury chamber

5Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Tapered Shielding Concept Dimensions

6Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Cryostat Modules All insertion/extraction from upstream end Locating & supporting features not shown – will require additional space

7Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Cryostat Modules Full View Module weight supported by cryostat? Probably not – another structure required Remote handling of these modules not trivial Note slot in shielding module for mercury chamber

8Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Assembled Cryostat Resistive magnet leads & water cooling for these modules also enter from upstream

9Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Original: 5cm Shielding at SC1

10Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 V2: 10cm Shielding Below Resistive Magnets, 15cm Above Allows mercury drainage below magnets while still providing W-C shielding

11Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 V2 Iso: 10cm Shielding Below Resistive Magnets, 15cm Above Asymmetric W-C structure, minimal shielding for SC1

12Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 V3: 30cm Shielding Below, 35cm Above, Constant ID

13Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 V3 Iso: 30cm Shielding Below, 35cm Above, Constant ID Simpler W-C shielding fabrication, sized to protect SC1

14Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Some Questions as Design Progresses Can system perform without iron plug and/or resistive magnets? – Removal simplifies remote maintenance, provides more space for nozzle & beam dump. What does internal cryostat structure (weight support, magnet force restraints) look like, and how does it affect overall cryostat size? Are 5 SC magnets required in this cryostat? – Downstream beam window should be at end of cryostat for remote maintenance from downstream end. What shielding thickness is required to protect SC1? – This will ultimately drive cryostat bore diameter.

15Managed by UT-Battelle for the U.S. Department of Energy NF Target Cryostat Review 10 Aug 2010 Summary & Reminders Current NF target design based on physics performance characteristics Further consideration shows it is an assembly of several subsystems, each with different design requirements and trade-offs – Several areas of engineering-related R&D, including heat removal, Hg flow, nozzle development, beam windows With Hg target (nor with any other target), hands-on maintenance cannot be assumed at any point in operation – Remote features must be incorporated into initial design Final system concept will result from an integrated design approach with input from several technical areas