• DOI:10.1088/1748-0221/16/02/T02001
• Corpus ID: 209468967

Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement

@article{Wagner2020BeambasedAA,
  title={Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement},
  author={Tim Wagner and Alexander Nass and J. Pretz and Falastine Abusaif and Anjali Aggarwal and A. Andres and Ilja Bekman and Nicola Canale and I. Ciepał and Gianluca Ciullo and F. Dahmen and Sergey Dymov and Christian Ehrlich and Ralf Gebel and Kirill Grigoryev and D. Grzonka and Volker Hejny and Jan Henry Hetzel and Andro Kacharava and Vsevolod Kamerdzhiev and Sunil Karanth and Irakli Keshelashvili and A. N. Kononov and A. I. Kulikov and Karim Laihem and Andreas Lehrach and Paolo Lenisa and Nodar Lomidze and Andrzej Magiera and David Mchedlishvili and Fabian M{\"u}ller and N. N. Nikolaev and Andrea Pesce and Vera Poncza and F. Rathmann and Markus Retzlaff and Artem Saleev and Michaela Schm{\"u}hl and Dito Shergelashvili and Vera Shmakova and Jamal Slim and Achim Stahl and Edward J. Stephenson and Hans Str{\"o}her and Mirian Tabidze and G. Tagliente and Richard M. Talman and Yu. Uzikov and Yu. V. Valdau and A. Wro'nska},
  journal={Journal of Instrumentation},
  year={2020},
  volume={16},
  pages={T02001 - T02001}
}

• T. Wagner, A. Nass, +47 authors A. Wro'nska
• Published 4 September 2020
• Physics
• Journal of Instrumentation

The Jülich Electric Dipole moment Investigation (JEDI) collaboration aims at a direct measurement of the Electric Dipole Moment (EDM) of protons and deuterons using a storage ring. The measurement is based on a polarization measurement. In order to reach highest accuracy, one has to know the exact trajectory through the magnets, especially the quadrupoles, to avoid the influence of magnetic fields on the polarization vector. In this paper, the development of a beam-based alignment technique is described that was developed and implemented at the COoler SYnchrotron (COSY) at Forschungszentrum Jülich. Well aligned quadrupoles permit one to absolutely calibrate the Beam Position Monitors (BPMs). The method is based on the fact that a particle beam, which does not pass through the center of a quadrupole, experiences a deflection. The precision reached by the method is approximately 40μm. Some consequences for the design of a new high precision storage ring for EDM mesasurements are discussed.