Power coupler Infrastructure


Clean rooms are available for cleaning, assembling, preparing and RF conditioning of power couplers. The existent infrastructures and equipment are adapted for mass production at a rate up to 8-10 couplers per week.

Technical means

First clean room (ISO4 and ISO6)
  • 200L Ultrasonic bath functioning at a power of 10 kW/l (dimensions 100x50x50)
  • 1 Leak detectors,
  • 1 particle counter,
  • 1 vacuum furnace reaching up to 400℃,
  • 25m2 ISO6 area for cleaning and assembly.
  • CPL4 CPL4
  • 12m2 ISO4 area for clean assembly,
  • CPL4
Second clean room (ISO5)
  • 3 baking ovens with their in-situ pumping systems hosting 2 coupler pairs each, reaching up to 220℃ and totally automatized with possibility of thermal cycle and vacuum level recording.
  • 2 leak detectors,
  • 4 RF test benches equipped with all the required diagnostics for coupler pairs conditioning (Arc detectors, electron pickups, vacuum monitoring, temperature sensors, power measurements...),
  • 40m2 ISO5 area for assembly-disassembly and clean storage.
  • CPL4
Power sources
  • 1 RF power source 1.3 GHz, 2MW with variable repetition rate (2-4Hz) with the required waveguides, circulators, spreaders, loads...
  • 1 RF power source 1.3 GHz, 5MW with variable repetition rate (1-10 Hz) with the required waveguides, circulators, spreaders, loads...

Achievements, related projects

  • About 60 TTF3 power couplers cleaned, assembled and RF processed before installation on FLASH (DESY),
  • Mass production (preparation and RF processing) of 850 power couplers for the European XFEL.

Technical steps, expertise

  • Ultra sonic cleaning of power couplers,
  • Clean room assembly,
  • Leak detection,
  • In-situ baking (up to 220℃) and vacuum monitoring during the process,
  • RF Tuning,
  • Residual gas analyser recording,
  • Couplers automatic RF conditioning procedure (8 couplers in the same time),


IJCLab - Orsay (France)


This technical platform provides the expertise and manpower to perform the work and training,


For further information, please email walid.kaabi@ijclab.in2p3.fr