DTL RF coupling port design at LPSC

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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)

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Rough view of the complexity
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Hypothesis for thermal calculations

• Températures in C
• Température of water 25C, velocity 2m/s
• Température fixed at limits (tank and guide )
  T25C
• cooling pipes F 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)

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Connecting guide cooling
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Connecting guide / Temperatures von Mises
constraints

• 15 duty cycle.
• Power towards the DTL 44W
• Power absorbed by the 3 cooling pipes 255W
• ?T  0.07C for water
• Constraints lt100 MPa

inner face
outer face
Steel thickness 6mmBoundary conditions 25 deg
C?T max 27 deg.?P0.2 Bar
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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
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displacements
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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