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Positron Working Group Meeting

US/Eastern
Zoom

Zoom

Eric Voutier (Université Paris-Saclay - CNRS/IN2P3/IJCLab)
    • 1
      Status of the positron beamline at MAMI

      The Institute for Nuclear Physics of the University of Mainz operates the accelerator complex MAMI which supplies an electron beam with a maximum energy of 1.6 GeV and a beam current of up to 100 μA. Outstanding qualities of MAMI is the continuous beam with an excellent beam quality of 4 pi nm rad emittance, a very low energy spread of less than 10-4, as well as its extremely high reliability. All kind of channeling experiments require such a high quality beam with a low divergence. Positrons, however, are more preferable because they have a significant longer de-channeling length. The aim of a new project is the preparation of high-quality positron beam using the MAMI accelerator. The current beamline comprises a thin conversion target, a positron spectrometer for energy selection (530 MeV) and detector systems. The very low emittance of the positron beam, allows proper focusing via a pair of quadrupoles to a low divergence. A parallel positron has been demanded by theory for future channeling radiation experiments. Preliminary tests of the positron beamline have been performed and will be presented within the talk.

      Speaker: Pascal Klag (University of Mainz)
    • 2
      Overview and the current status of the FCC-ee positron source

      The Future Circular Collider (FCC-ee), currently in the Feasibility Study phase, is an electron-positron collider designed for various operational modes, including Z, W, H bosons, and ttbar. To achieve high luminosity, it requires a high-intensity, low-emittance positron source. This presentation will provide a brief overview of the FCC-ee injector complex and focus on the positron source. It will cover ongoing studies on two positron production schemes: conventional and crystal-based, emphasising their performances. Finally, will conclude with a description of the developed simulation models and experimental studies, including an overview of the proof-of-principle positron source experiment at PSI (P3) aimed at validating the proposed positron source design.

      Speaker: Fahad Alharthi (Université Paris-Saclay - CNRS/IN2P3/IJCLab)