Pour vous authentifier, privilégiez eduGAIN / To authenticate, prefer eduGAINeu


The Berlin Energy Recovery LINAC Project (bERLinPro), a 100-mA, 50-MeV ERL design was originally conceived to demonstrate ERL technology for use in a future high-brilliance light source at HZB. This endeavor was officially ended in 2020 and the facility transferred into the commissioning stage.

The full infrastructure for ERL operation, including cryogenics, high-power RF, the UHV vacuum system, beam diagnostics, magnets and complete beam transport is installed. SRF cavity systems for a photoinjector and booster of the injector path are currently being assembled. 

bERLinPro now serves as a general accelerator test facility to explore a broadening set of technologies and applications from SRF photoinjectors and high-power SRF-based energy recovery to ultrafast electron diffraction (UED) that takes advantage of the unique properties of the SRF-based injector. Presently, the commissioning of the ca. 10-mA SRF photoinjector is under way, followed by the assembly of the booster module. In future, plans are to explore the 10 – 100 mA beam current range. This includes the potential to use bERLinPro/SEALab to explore technologies and concepts that are key elements of the European Accelerator Roadmap for particle physics, e.g. explore pathways towards a more sustainable large scale science driver. In midterm, the SRF photoinjector commissioning starts autumn 2023 and we expect first beam around early 2024.


270 kW CW 1.3 GHz klystron from CPI

Example of local cleanroom for installing the beam vacuum system

Recirculator and linac cryo coldbox in the center

SRF Gun cryo-module view from the side with one fundamental power coupler port


Some references:

  • B. Alberdi et al., Sci. Rep. 12, 13365 (2022)
  • M. Abo-Bakr et al., “Status Report of the Berlin Energy Recovery Linac Project bERLinPro”, in Proc. 9th Int. Particle Accelerator Conf. (IPAC'18), Vancouver, BC, Canada, Apr. 4, pp. 4127-4130, doi:10.18429/JACoW-IPAC2018-THPMF034
  • A. Neumann et al., “The BERLinPro SRF Photoinjector System - From First RF Commissioningto First Beam”, in Proc. 9th Int. Particle Accelerator Conf. (IPAC'18), Vancouver, BC, Canada, Apr. 4, pp. 1660-1663, doi:10.18429/JACoW-IPAC2018-TUPML053
  • M. Schmeisser et al., PRAB 21, 113401 (2018), doi:10.1103/PhysRevAccelBeams.21.113401
  • A. Neumann et al., “High Power Coupler Conditioning for bERLinPro Energy Recovery Linac Injector”, in Proc. IPAC‘21, Campinas, SP, Brazil, May 2021, pp. 1080-1083, doi:10.18429/JACoW-IPAC2021-MOPAB347