Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement
Abstract
The J\"ulich 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 J\"ulich. 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 40 micro meter. Some consequences for the design of a new high precision storage ring for EDM mesasurements are discussed.
Keywords
Cite
@article{arxiv.2009.02058,
title = {Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement},
author = {T. Wagner and A. Nass and J. Pretz and F. Abusaif and A. Aggarwal and A. Andres and I. Bekman and N. Canale and I. Ciepal and G. Ciullo and F. Dahmen and S. Dymov and C. Ehrlich and R. Gebel and K. Grigoryev and D. Grzonka and V. Hejny and J. Hetzel and A. Kacharava and V. Kamerdzhiev and S. Karanth and I. Keshelashvili and A. Kononov and A. Kulikov and K. Laiham and A. Lehrach and P. Lenisa and N. Lomidze and A. Magiera and D. Mchedlishvili and F. Müller and N. N. Nikolaev and A. Pesce and V. Poncza and F. Rathmann and M. Retzlaff and A. Saleev and M. Schmühl and D. Shergelashvili and V. Shmakova and J. Slim and A. Stahl and E. Stephenson and H. Ströher and M. Tabidze and G. Tagliente and R. Talman and Yu. Uzikov and Yu. Valdau and A. Wrońska},
journal= {arXiv preprint arXiv:2009.02058},
year = {2021}
}
Comments
Submitted to "Journal of Instrumentation (JINST)"