Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement
Open Access
- 1 February 2021
- journal article
- research article
- Published by IOP Publishing in Journal of Instrumentation
- Vol. 16 (02), T02001
- https://doi.org/10.1088/1748-0221/16/02/t02001
Abstract
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.This publication has 5 references indexed in Scilit:
- Search for electric dipole moments of charged particles in storage ringsAIP Conference Proceedings, 2020
- Measurement of the Permanent Electric Dipole Moment of the NeutronPhysical Review Letters, 2020
- Beam-based alignment of the SuperKEKB linac quadrupolesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2019
- Beam-based alignment tests at the Cooler Synchrotron (COSY)Hyperfine Interactions, 2018
- Beam based alignment and its relevance in Indus-2Review of Scientific Instruments, 2015