In-kind contributions

Much of the European XFEL's equipment was provided by a variety of European institutes through in-kind contributions. The value of in-kind contributions to the facility amounted to around 50% of the total construction and commissioning budget.

Over 20 institutes across Europe contributed equipment, components, or staff to the European XFEL's construction and commissioning. Each in-kind contribution (IKC) began as a proposal that had to be reviewed by the in-kind review committee (IKRC) and approved by the European XFEL Management Board (for contributions below 1 million euro) or Council (for higher-value contributions, following recommendation by the Administrative and Finance Committee). In the following table, the total values for each country's IKCs are listed.

Number of IKCs
IKC value (k€)


4 087



36 000



446 529



33 000



19 131



42 026



8 071



4 882



8 835

United Kingdom





603 886


DTU, Physics Department, Copenhagen

Technical University of Denmark, Physics Department


  • DK01 (WP-81): Design, production, and commissioning of several components for the scientific instrument FXE
  • DK02 (WP-81, WP-82, WP-83, WP-84): Design, production, and commissioning of X-ray beam delivery units for Work Packages 81, 82, 83, and 84


CNRS (IN2P3), Orsay

Centre National de la Recherche Scientifique – Institut National de Physique Nucléaire et de Physique des Particules


  • FR01 (WP-05): RF input couplers of the superconducting linac: production of 800 couplers, RF conditioning, and delivery to Saclay under clean packing conditions


CEA (IRFU), Saclay

Commissariat à l'Energie Atomique et aux Energies Alternatives – Institut de Recherche sur les lois Fondamentales de l'Univers


  • FR02 (WP-09): Assembly in clean room of 103 strings of 8 superconducting cavities each
  • FR03 (WP-03): - Procurement of magnetic shielding for the cavities - Procurement of superinsulation and hardware for the cryomodules - Assembly of 103 cryomodules of the superconducting linac, alignment, tests, leak checks, and delivery to AMTF hall
  • FR04 (WP-17): Re-entrant cavity BPMs: design, production, delivery, and commissioning


DESY, Hamburg

Deutsches Elektronen-Synchrotron


  • DE01 (WP-01): RF system: design & development of the high power RF system - Procurement, installation, and commissioning of: HV pulse modulators, Klystrons, power supplies, preamplifiers, RF interlocks, RF cables, waveguide systems.
  • DE02 (WP-02): Low Level RF: controllers for the superconducting cavities, design and procurement of hardware and software, installation, and commissioning
  • DE03 (WP-03): Accelerator cryomodules: follow-up and coordination of the different contributors
  • DE04 (WP-04): Superconducting cavities: definition of processes for cavity preparation and assembly, cavities production, adjustment and calibration, delivery to CEA Saclay
  • DE05 (WP-05): Power couplers: design and procurement of interlock and control electronics, follow-up of IKC by CNRS, commissioning
  • DE07 (WP-07): Frequency tuner: design, qualification of components, procurement, assembly of mechanism for frequency tuning and stabilization of each accelerator cavity
  • DE08 (WP-08): Cold vacuum: specifications and design of components, follow-up of BINP contribution, installation, and commissioning
  • DE09 (WP-09): Cavity string assembly: procedures of assembly of 8-cavities string in ISO-4 clean room, cavities transport rack, follow-up and control of activities at CEA Saclay during assembly in series
  • DE10 (WP-10): Infrastructure and cryogenic components for the AMTF hall: magnet test cryostat, 2 helium pumps, pipeline bridge, 2 valve boxes, subcooler box, helium storage dewar, cryogenics control system, shielding of 3 test stands.
  • DE11 (WP-11): Cold magnets: specifications and design of a superconducting magnet package including a superferric quadrupole and 2 nested deflecting dipoles using special current leads, to be mounted inside each cryomodule
  • DE12 (WP-12): Warm magnets: overall layout, specifications, coordination of contributions by BINP and Efremov Institute, installation and commissioning of about 700 magnets
  • DE13 (WP-13): Cryogenics for linac: XFEL Helium refrigerator, pipeline bridge to XSE, XFEL cryogenic process controls, follow-up of IKCs by BINP and IHEP, coordination of installation and commissioning
  • DE14 (WP-14): Injector
  • DE15 (WP-15): Bunch Compression and Start-to-End Simulation
  • DE16 (WP-16): Lattice: Beam optics design and beam kickers
  • DE17 (WP-17): Standard e-Beam Diagnostics: Button and Cavity BPMs, screen monitors, beam intensity and loss monitors, coordination of IKCs by CEA, PSI and IHEP, commissioning
  • DE18 (WP-18): Special e-beam diagnostics: TDS specifications and follow-up of contract with INR, control system and synchronization with master clock, installation and commissioning
  • DE19 (WP-19): Warm vacuum system: design and procurement of vacuum chambers and of control electronics, follow-up of contract with BINP, installation and commissioning
  • DE20 (WP-20): Beam Dumps: specifications, design of exchange vehicle, follow-up of contract with IHEP, performing tests and commissioning
  • DE21 (WP-21): FEL Concepts: reference design base of the FEL layout, calculation of SASE parameters
  • DE28 (WP-28): Accelerator Control System
  • DE32 (WP-32): Survey & Alignment: manpower and instrumentation for alignment of equipment in the tunnels
  • DE33 (WP-33): Installation: manpower for planning, preparing and executing the complete tunnel installation
  • DE34 (WP-34): Utilities in buildings and tunnels: system design, procurement, installation and commissioning
  • DE35 (WP-35): Radiation Safety: guidelines, supervision and control, detectors and monitoring
  • DE36 (WP-36): General Safety
  • DE38 (WP-38): Personnel Interlock: system design, procurement and installation on site
  • DE39 (WP-39): EMC Electro Magnetic Compatibility: rules and guideline, follow-up and control of all concerned equipment and activities
  • DE45 (WP-45): AMTF Hall and technical infrastructure: construction of the hall and installation of utilities
  • DE46 (WP-46): 3.9 GHz module: coordination and commissioning
  • DECO: Commissioning of the European XFEL


INFN, Milano

Istituto Nazionale di Fisica Nucleare


  • IT01 (WP-04): Production, tests and delivery of Niobium cavities (50%)
  • IT02 (WP-03): Production and delivery to Saclay of 25 cryomodule pressure vessels
  • IT03 (WP-46): Production and delivery of the 3.9 GHz accelerator module


NCBJ, Świerk

National Centre for Nuclear Research


  • PL01 (WP-06): High Order Modes (HOM) couplers and Beam Line Absorbers (BLM): production, tests and delivery


WUT, Wrocław

Wrocław University of Technology


  • PL04 (WP-10): Transfer line XATL1 and two vertical test stands for AMTF: production, tests and delivery to AMTF hall, installation and commissioning


IFJ-PAN, Kraków

The Henryk Niewodniczański Institute for Nuclear Physics Polish Academy of Science


  • PL05 (WP-10): Qualification tests of all Nb cavities and of all cryomodules in the AMTF hall: procedures, logistics, QA issues, test reports, database management
  • PL07 (WP-11): Tests of all cold magnets in the AMTF hall: procedure, logistics, QA issues, test reports, database management


JINR, Dubna

Joint Institute for Nuclear Research


  • RU03 (WP-74): MCP based detectors: design, production, tests, calibration and delivery of 3 detectors


IHEP, Protvino

Institute for High Energy Physics


  • RU07 (WP-13): Cryogenic equipment for the linac: design, production, delivery, installation and commissioning
  • RU08 (WP-20): Beam Dumps: design, production, and tests of 5 Main Dumps and 2 Injector Dumps, including supports, shielding and exchange tools
  • RU09 (WP-17): Mechanical components and scintillators for the Beam Loss Monitors: production, assembly and tests


NIIEFA, St Petersburg

D.V. Efremov Scientific Research Institute of Electrophysical Apparatus


  • RU11 (WP-12): 710 Warm magnets of different types: design, production and delivery


BINP, Novosibirsk

Budker Institute of Nuclear Physics, Siberian Branch of Academy of Science


  • RU17 (WP-12): 127 Quadrupole magnets type XQA: design, production, tests and delivery to Stockholm
  • RU18 (WP-08): Components for the Cold vacuum: design, production and delivery
  • RU19 (WP-19): Components for the Warm vacuum: design, production, delivery and installation
  • RU20 (WP-10): 3 cryomodules test stands for the AMTF including moving supports, feed boxes, feed & end caps, adapters and transfer lines: design, production, delivery and assembly
  • RU21 (WP-34): Power supplies: production, tests and delivery
  • RU24 (WP-13): Cryogenic equipment for the linac: XLVB Linac Valve Box and XICE components; design, production, delivery, installation and commissioning


INR, Moscow

Institute for Nuclear Research, Russian Academy of Science


  • RU22 (WP-18): 3 Transverse Deflecting Structures and RF power supplies for special e-beam diagnostics: design, production, delivery and commissioning


CELLS, Barcelona

Consortium for Construction, Equipment, Exploitation of the Synchrotron Light Laboratory


  • ES01 (WP-71): Payment for 7 mechanical support systems for the undulators


CIEMAT, Madrid

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas


  • ES02 (WP-11): Cold magnets: design, production, tests, and delivery to DESY of 103 magnets
  • ES04 (WP-71): 91 Phase shifters and Quadrupole movers for the undulators intersections: design, prototypes, series production, and delivery to DESY


UPM, Madrid

Universidad Politécnica de Madrid


  • ES03 (WP-34): 222 Power supplies (4 types) for the cold quadrupole and dipole magnets: design, prototypes, series production, tests, and delivery to DESY


Gothenburg University, Gothenburg


  • SE11 (WP85): Magnetic Bottle Electron Spectrometer


KTH, Stockholm

Royal Institute of Technology


  • SE02 (WP-73): Heat load investigations on diffractive optics: fabrication of "zone plate" nanostructures on diamond substrate, simulations of heat transport, design of cooling systems, and heat load tests with beam


MSL, Stockholm

Manne Siegbahn Lab at Stockholm University


  • SE04 (WP-12): Fiducialization of 127 quadrupole magnets type XQA: measurement of the magnetic axis with 2-micrometer resolution, measurement of distance between magnetic axis and fiducials within 50 micrometers
  • SE06 (WP-71): Temperature measurement system for the undulator segements: system design and validation, production and delivery of temperature sensors


Physto, Stockholm

Physics Department at Stockholm University


  • SE05 (WP-28): - Timing and synchronization system - Configuration and authentication management


UU, Uppsala

Uppsala University


  • SE01 (WP-79): Sample injector and diagnostic system: design, production and delivery of a sample injector and catcher system with laser-based injector alignment, and of optical probes to record plasma emission at the interaction point
  • SE03 (WP-14): Laser heater system for the injector: design, production, test, delivery, and commissioning
  • SE08 (WP-84): Secondment of physicist for the structural biology instrumentation


PSI, Villigen

Paul Scherrer Institut


  • CH03 (WP-17): BPMs electronics: design, production, installation, and commissioning
  • CH04 (WP-16): Transverse Intra-Bunchtrain Feedback System

United Kingdom

Science and Technology Facilities Council

  • Train builder and large pixel detector

Further information

For further information please see the Technical Design Report.