Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 11: Few-body physics
HK 11.4: Talk
Monday, March 16, 2009, 15:00–15:15, H-ZO 100
The MAX-lab tagged photon facility — •Lennart Isaksson — MAX-lab, Lund University, Sweden
The tagged photon facility at MAX-lab in Lund, Sweden has recently been upgraded to higher energy. The present facility consists of a ∼200 MeV linac followed by a pulse stretcher ring. The extracted electron beam (∼50% duty factor) is used to generate a bremsstrahlung beam and photons are tagged by a choice of two different tagging spectrometers, optimized for different energy regions. The tagged photon range may presently be chosen between 15 MeV and 185 MeV. The energy resolution is typically ∼0.5 MeV and the tagged intensity is ∼106 MeV−1 s−1. The available energy may increase somewhat in the near future.
The initial experimental programme includes Compton scattering on deuterium using very large NaI detectors, (γ,π+) measurements using both solid-state and scintillator set-ups, and tests of electromagnetic calorimeter elements for the PANDA detector. Initial tests have been performed on total absorption cross-section measurements on 4He, using an active target, and on 6,7Li. A linearly polarized photon beam from coherent bremsstrahlung is being commissioned.
The MAX-lab tagged photon facility will be presented and an overview of the present experimental programme given.