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19 April 2024

» arxiv » 2009.02058

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Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement
T. Wagner ; A. Nass ; J. Pretz ; F. Abusaif ; A. Aggarwal ; A. Andres ; I. Bekman ; N. Canale ; I. Ciepal ; G. Ciullo ; F. Dahmen ; S. Dymov ; C. Ehrlich ; R. Gebel ; K. Grigoryev ; D. Grzonka ; V. Hejny ; J. Hetzel ; A. Kacharava ; V. Kamerdzhiev ; S. Karanth ; I. Keshelashvili ; A. Kononov ; A. Kulikov ; K. Laiham ; A. Lehrach ; P. Lenisa ; N. Lomidze ; A. Magiera ; D. Mchedlishvili ; F. Müller ; N.N. Nikolaev ; A. Pesce ; V. Poncza ; F. Rathmann ; M. Retzlaff ; A. Saleev ; M. Schmühl ; D. Shergelashvili ; V. Shmakova ; J. Slim ; A. Stahl ; E. Stephenson ; H. Ströher ; M. Tabidze ; G. Tagliente ; R. Talman ; Yu. Uzikov ; Yu. Valdau ; A. Wrońska ;
Date:	4 Sep 2020
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.
Source:	arXiv, 2009.02058
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