E - Beam Target Interaction

Beam Target Interaction

Experimental requirements ultimately define the necessary quality of particle beams. The emittance of the beam is mainly determined by the particle source and the injector. In addition, the initial energy spread cannot be reduced anymore except by using collimation of the beam. which produces background radiation, activation and losses of beam power, or by using advanced damping or cooling methods which cannot be applied in short few-pass machines like ERLs. Experiments and accelerator are entangled even more in ERLs than in conventional linacs, because the beam is sent back into the accelerator after the experiment. For that reason the experimental setups need to be designed carefully in order not to disturb the beam too much for being recovered in the linac. Project Area E of AccelencE addresses this task together with studies on improved detector resolution.

Research topics

  • Strahlstabilität und Stabilisierungsaspekte am MESA (Match)

    Beam stability and stabilization aspects of MESA (match)

    Author: M.Sc. Pascal Klag

    Supervisor: Prof. Dr. Frank Maas

  • Das polarisierte interne "Hydro-Møller"-Target am MESA (Match)

    The polarized internal “Hydro-Møller” target at MESA (match)

    Author: Dr. Valerie Tioukine

    Supervisor: Prof. Dr. Kurt Aulenbacher

  • Laserentwicklung für die nukleare Photonik (Match)

    Laser development for nuclear photonics (match)

    This project aims to establish laser Compton backscattering at the S-DALINAC to produce a brilliant monochromatic high-energy photon beam for nuclear photonics applications in photonuclear reactions and for beam diagnostics. In combination with the existing ERL mode of the S-DALINAC, it is envisaged to be used as 4th generation gamma source.

    Author: M.Sc. Maximilian Meier

    Supervisors: Prof. Dr. Joachim Enders, Prof. Dr. Dr. h.c. mult. Norbert Pietralla

  • Verbesserung der Energieauflösung des QCLAM-Spektrometers am S-DALINAC

    Improving the energy resolution of the QCLAM spectrometer at S-DALINAC

    The superconducting Darmstadt linear accelerator (S-DALINAC) has been furnished with a third recirculation beamline during the last major upgrade. A beam scraper has also been installed, leading to an increased energy resolution. With this configuration, the QCLAM-magnet-spectrometer is the limiting factor regarding energy resolution for future coincidence experiments with large acceptance. This project addresses the required reconstruction of the detector system in order to address these new requirements for the spectrometer.

    Through adjustment of the gas mixture used for the multi-wire drift chambers (MWDCs) of the detector system, diffusion of the electron avalanche within the gas is reduced, leading to a better time resolution for time-of-flight measurements. Elaborated tests of the current MWDCs have highlighted the need of a new design. This project aims to develop MWDCs with improved manageability for routine use and enhanced gas purity.

    Author: M.Sc. Antonio D'Alessio

    Supervisors: Dr. Volker Werner, Prof. Dr. Dr. h.c. mult. Norbert Pietralla

  • Entwicklung des MAGIX-Targetsystems

    Development of the MAGIX Target System

    Author: Dipl.-Phys. Stephan Aulenbacher

    Supervisors: Prof. Dr. Achim Denig, Dr. Harald Merkel