The upgraded photon tagging facility at the MAX IV Laboratory

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• Tagged photons in the energy range 10–180 MeV with an energy resolution of 300 keV are available.
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• Coherent bremsstrahlung is used to produce linearly polarized photons in the energy range below 70 MeV.
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• Several diagnostic tools are used to monitor the data taking.
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• The research program includes Compton scattering on deuterium and light nuclei.
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• Also included are (γ,p)(γ,p), (γ,π)(γ,π), (γ,total)(γ,total) cross-section measurements on nucleons and nuclei.

A description is given of the upgraded photon tagging facility at the MAX IV Laboratory. Two magnetic spectrometers are used to momentum analyze post-bremsstrahlung electrons. The tagged photon range extends from 10 to 180 MeV with an energy resolution of about 300 keV. The system has been operated at rates up to 4×106 photons s-1 MeV −1. Different diagnostic tools are described as well as the experimental program.