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LINAC Work Packages

WP 1: RF System

  • Cost-optimized and still flexible (rep. rate) system: 10MW MBK final decision or alternatives?
  • Design + tests necessary for modulator at high frep?
  • Concept for fast Klystron Exchange?
  • Work Package Leader: S. Choroba (Desy)

WP 2: Low Level RF (LLRF)

  • # cavities per Klystron?
  • Electronics in tunnel (radiation)?
  • Handling of non-uniform bunch trains?
  • Intra-train energy scan?
  • "Conventional" timing issues
  • Work Package Leader: J. Branlard (Desy)

WP 3: Accelerator Modules

  • Module assembly w/o tuner&coupler; start with assembled string and finish with module installation
  • Weld connections
  • Alignment inside modules
  • Transportation
  • Safety issues
  • Material specifications
  • Define processes for integration/assembly
  • Magnetic shielding/ Demagnetization
  • Sensors
  • Define processes for integration/assembly
  • Survey
  • Pre-Alignment of cavities and coupler position
  • Work Package Leader: O. Napoly (CEA) / K. Jensch (Desy)

WP 4: S.C. Cavities

  • Cavity baking in-situ
  • EP on cavities with tank
  • Determination of electrical axis of cavity
  • Check mechanical properties of niobium after 800C
  • Define processes of cavity preparation and assembly
  • Optimum EP parameters
  • First 10 nine cell-preparations after EP + 800C + bake
  • Material
  • EP on half cells, dumb-bells
  • Optimum stress annealing + hydrogen degassing temperature (600 – 1000C)
  • Other cleaning techniques: Oxipolishing, BCP 1:1:10, etc
  • Development of CO2 cleaning
  • Cavity Production
  • Work Package Leader: W. Singer (Desy) / P. Michelato (INFN)

WP 5: Power Coupler

  • Alignment of coupler bellows
  • Define processes for integration/assembly
  • Define detailed specification for coupler
  • Processing procedure
  • Fixed or tuning of the coupler
  • Define sensors needed
  • Interlock electronics
  • Work Package Leader: Walid Kaabi (IN2P3) / W.-D. Moeller (Desy)

WP 6: HOM Coupler / Pick-Up

  • TW absorber
  • Define detailed specification for HOMs
  • Define processes for assembly
  • Improved existing HOM coupler
  • Define detailed specification for pick-ups
  • Define processes for integration/assembly
  • Cavity HOM loads at 70K?
  • Integrate antenna in feedthrough
  • Work Package Leader: J. Sekutowicz (Desy) / E. Plawski (IPJ)

WP 7: Frequency Tuner

  • Define detailed specification for tuner
  • Define processes for integration/assembly
  • Piezo mechanical design
  • Work Package Leader: L. Lilje (Desy) / A. Bosotti (INFN)

WP 8: Cold Vacuum

  • Define detailed specification for flanges
  • Define processes for integration/assembly
  • Investigate/ Improve existing design for TTF2
  • Type of bellows
  • Number of bellows
  • Number and design of gate valves
  • Inter-cavity spacing
  • development of new flange design
  • Welded or flanged design? Where?
  • Work Package Leader: L. Lilje (Desy)

WP 9: Cavity String Assembly / Clean Room Quality Assurance

  • Define processes for integration/assembly
  • QC of Infrastructure (Clean room, Water supply, Chemistry, EP)
  • Define processes for clean room procedures
  • QC of flange assembly
  • High pressure rinsing: Online measurement of particles; TOC?, resistivity?
  • Database / EDMS
  • Work Package Leader: S. Berry (CEA) / A. Matheisen (Desy)

WP 11: Cold Magnets

  • 2K Quadrupole
  • Measurement of mechanical vibrations
  • Work Package Leader: H. Brück (Desy) / F. Toral (CIEMAT)

WP 46: 3.9 GHz System

  • coordination of the FLASH 3.9 GHz module as XFEL prototype
  • procurement of all components for 3.9 GHz system
  • module assembly
  • RF and RF control
  • installation and commissioning of the system
  • Work Package Leader: P. Pierini (INFN) / E. Vogel (Desy)

 

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