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Advanced Muon Dump Design and Cooling Solutions for High-Intensity Beam Absorption

The HiRadMat muon dump incorporates advanced cooling systems and robust materials to handle extreme heat deposition from high-energy beams, reaching up to 2.4 MJ per pulse. With a core made of graphite (0.6x0.6x1.3 m³), options for air or water cooling, and cast iron shielding, this design aims to optimize the muon and beam dump performance. Integrated within the T9 shielding castle, it addresses oxidation issues and ensures integrity under high beam impact scenarios. Future steps will focus on defining load cases and thermal calculations for safe operation.

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Advanced Muon Dump Design and Cooling Solutions for High-Intensity Beam Absorption

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  1. HiRadMatMuon Dump

  2. Layout-1

  3. Layout-2 Muon dump • Beam dump, downstream of experiments/targets, • Designed to absorb primary beam (when no target ) • Active cooling & special core

  4. Heat deposition (depends on heat deposition, beam size and cooling used) • Per pulse • Up to 2.4 MJ • Materials • Core of graphite ~0.6x0.6x1.3m3(unless temperature too high) • Core in “box” (integrity) or under inert gas (oxidation) – or not? • Cast iron shielding (recuperate from T9 and T1) • Location: • Integrated in T9 shielding castle (remove T9 core, use and complete existing shielding with blocks from T1) • More downstream (larger & more diffused beam) • “Diffuser” at T9 and muon dump further down

  5. Different options (depends on heat deposition, beam size and cooling used) • Cooling: • Air or water-cooling? • On outside walls (shielding) or on core? • Materials • Core of graphite ~0.6x0.6x1.3m3(unless temperature too high) • Core in “box” (integrity) or under inert gas (oxidation) – or not? • Cast iron shielding (recuperate from T9 and T1) • Location: • Integrated in T9 shielding castle (remove T9 core, use and complete existing shielding with blocks from T1) • More downstream (larger & more diffused beam) • “Diffuser” at T9 and muon dump further down

  6. For comparison: CNGS Hadron Stop • Designed to absorb 100kW • Graphite core (2.4x2.8x3.2m3) • Water cooling around core (Stainless Steel piping in Aluminium cast blocks) • Cast iron bulk (4x4x17m3)

  7. Hiradmatvs CNGS Hadron Stop • Beam size & impact frequency: • Hadron stop: beam size is ~1m (1km after target and designed for secondary beam only) and ~0.3Hz • Hiradmat: beam size is ~1mm (primary beam) and ~kHz  Impact & fatigue effect is higher, graphite might not resist (pitting, losing integrity) • Average beam heat deposition: • Hadron Stop: 50kW (secondary, ultimate beam) • Hiradmat: many different cases, but worst case? • Maximum pulse energy: • Hadron Stop: low, only secondary beam (~kJ?) • Hiradmat: 2.4MJ!

  8. Next steps • Define beam structure load cases • Define worst case scenario for immediate and average heat deposition • Obtain heat depositions (Fluka) • Thermal & shock FE-calculations • Survey available shielding (from T1 and T9)

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