1st interaction region design meeting

Wednesday 2 Apr 2025, 14:00 → 15:30 Europe/Zurich

6/R-018 (CERN)

InjectionRegion-1.pdf

Present: Patric Muggli, Michele Bergamaschi, Frederic Galeazzi, Eleonora Belli, Philip Schwarz, Vittorio Ferrentino, Marlene Turner

Possible interference between the 150 MeV electron beamline magnets, the proton beam trajectory, and the vapor source.

• Action: Frederic to quantify distances from the CAD drawings.

Octupoles

• Still to be designed; the goal is to reduce spatial footprint of at least the last magnet in the line by:
  • Minimizing margins on the magnetic field (avoid overspecification).
  • Reducing aperture size (beam pipe).
    
    
• Next Steps:
  • Provide functional specifications (Philip to share an example).
  • Iterate to finalize a solution.

Sextupoles:

• Preferred approach: Reuse existing magnets where possible.
• See if possible from drawing

 

Dipole Magnets

• Determine the maximum aperture while maintaining sufficient field quality for electron beam specifications.
• Philip and team can provide measured or simulated field maps for different gap sizes.
• Action: Define the deadline for a final decision on redesign.

Correctors:

• Correctors: Already designed, with a simplified design implemented in CAD.

Cost & Design of Magnets

• Refurbished magnets: ~500 CHF per magnet.
• New magnet design: Estimated at ~25k CHF (if needed).
• Redesigning magnets would require approximately 2 years

 Magnet Thermal Considerations

• Maximum safe temperature for the magnet yoke is ~100°C.
• Other components may be warmer, but temperature distribution must be considered.

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