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RF Coupling Port Design at LPSC: Finalized Tank Design and Feasible Cooling

This document discusses the RF coupling port design conducted at LPSC, including thermal and mechanical studies. The goal is to finalize the tank design, with minor considerations such as helicoflex joints and thickness versus strengtheners. The findings indicate that the cooling of the waveguide is not an issue, and power exchange calculations have been transmitted to the tank team. The design is ready to be implemented.

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RF Coupling Port Design at LPSC: Finalized Tank Design and Feasible Cooling

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  1. DTL RF coupling port design at LPSC Emmanuelle Vernay, Denis Marchand, D Bondoux Presented by JM De Conto SERM_HIPPI_NC_XX16.doc(in preparation) Goals: • RF design: done by PE Bernaudin • Thermal and mechanical studies done at LPSC • Decision can now be taken • Finalized, allows tank design (Russia) • Minor points (helicoflex joints/thickness versus strengtheners…) JM De Conto - Oxford, 2005

  2. Rough view of the complexity JM De Conto - Oxford, 2005

  3. Hypothesis for thermal calculations • Températures in °C • Température of water = 25°C, velocity 2m/s • Température fixed at limits (tank and guide ) T=25°C • cooling pipes Φ 10mm • Conductivity stainless steel = 16.3W.K-1.m-1, • 15% duty cycle • Studies also made for copper (not presented) • Transient (continuous vs not continuous) studies done (no difference) JM De Conto - Oxford, 2005

  4. T=25°C Cooling pipes “DTL side” H = 10000 W.m-2.K-1 T=25°C flange Cooling pipe “waveguide side” H = 10000 W.m-2.K-1 T=25°C Connecting guide cooling JM De Conto - Oxford, 2005

  5. Connecting guide / Temperatures – von Mises constraints • 15% duty cycle. • Power towards the DTL : 44W • Power absorbed by the 3 cooling pipes 255W • T = 0.07°C for water • Constraints <100 MPa inner face outer face Steel thickness: 6mmBoundary conditions: 25 deg CΔT max = 27 deg.ΔP~0.2 Bar JM De Conto - Oxford, 2005

  6. Wave guide: not a problem • Exchange with cooling fluid • with tube 1 = 110 W • With the 3 tubes in the central part of the waveguide  : 53W JM De Conto - Oxford, 2005

  7. displacements JM De Conto - Oxford, 2005

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  11. Conclusion • Tuning • At low level • RF guide will be cut at the right length before soldering • Cooling of the wave guide is not an issue • Deformation is not an issue • Temperature increase acceptable for DTL • Cooling seems to be feasible • Few room for the connecting guide cooling • Power exchange calculated • Data transmitted to the tank team • Interface: the flange • Connecting guide = part of the tank • Below: part of the waveguide • Ready to be launched JM De Conto - Oxford, 2005

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