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Engineering Issues for the High-Power-Target System of a Neutrino Factory

Delve into the complexities of designing a robust high-power target system for a neutrino factory, including magnet configurations, shielding, and cost estimates. Explore concepts like solenoid capture systems, mercury jet targets, and superconducting magnets.

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Engineering Issues for the High-Power-Target System of a Neutrino Factory

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  1. Engineering Issues for the High-Power-Target System of a Neutrino Factory K. McDonald Princeton U. (April 6, 2013) 10th IDS-NF Plenary Meeting Rutherford Appleton Laboratory

  2. The Target System of a Muon-Collider or Neutrino Factory In the IDS-NF costing scenario, the Target System includes the production target and the magnetized pion-decay channel. This system is about 50 m long. Very preliminary cost estimate now exists. (A Fermicentric vision)

  3. From A. Kurup’s Costing Talk

  4. Extract from A. Kurup’s Sheet TCDCostSummary.xlsx

  5. Target and Capture Topology: Solenoid Desire  1014/s from  1015p/s ( 4 MW proton beam) Superconducting magnets • R.B. Palmer (BNL, 1994) proposed a 20-T solenoidal capture system. • Low-energy 's collected from side of long, thin cylindrical target. • Solenoid coils can be some distance from proton beam. •  10-year life against radiation damage at 4 MW. Liquid mercury jet target replaced every pulse. • Proton beam readily tilted with respect to magnetic axis. •  Beam dump (mercury pool) out of the way of secondary 's and 's. Present Target Concept Tungsten beads, He gas cooled Be window Proton beam and Mercury jet Mercury collection pool With splash mitigator Resistive magnets Shielding of the superconducting magnets from radiation is a major issue. Magnet stored energy ~ 3 GJ! 5-T copper magnet insert; 15-T Nb3Sn coil + 5-T NbTi outsert. Desirable to replace the copper magnet by a 20-T HTC insert.

  6. Target Module Costs Scaled from SNS (ORNL) Neutrino Factory Study 2 concept SNS/JNS Mercury target Mercury-loop utilities

  7. Magnet and Shielding Costing by Bob Weggel

  8. Weggel’s cost estimate agrees to within 2% with the Green-Strauss algorithm (A. Bross).

  9. Target Hall A major cost driver will be civil construction and shielding. LBNE 2-MW target station ~ $175m Crude sketch to start IDS-NF costing NuMI target hall

  10. Decay Channel with Chicane Concept fairly well developed, but little technical study yet of issues of shielding and magnet configurations. A recent, preliminary look by B. Weggel notes that use of HTS conductors is likely cost advantageous compared to copper or Nb conductors. NuMI target hall

  11. Neutrino Factory Study 2 Concepts

  12. LBNE Target Hall Concept

  13. The NF Target System Hall is equivalent in many ways to the LBNE Decay Pipe.

  14. We may need concrete shielding ~ 5.5 m thick around the entire target system.

  15. We must have an activated-air handling system for the Target System Hall.

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