1. Spin tune mapping as a novel tool to probe the spin dynamics in storage rings
- Author
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Saleev, A., Nikolaev, N. N., Dymov, S., Eversmann, Dennis, Gaißer, Martin Otto, Gebel, R., Grigoryev, K., Grzonka, D., Guidoboni, G., Heberling, Dirk, Hejny, V., Hempelmann, Nils, Rathmann, F., Hetzel, J., Hinder, Fabian, Kacharava, A., Kamerdzhiev, V., Keshelashvili, I., Koop, I., Kulikov, A., Lehrach, Andreas, Lenisa, P., Lomidze, N., Augustyniak, W., Lorentz, B., Maanen, Paul, Macharashvili, G., Magiera, A., Mchedlishvili, D., Mey, S., Müller, F., Nass, A., Pesce, A., Prasuhn, D., Bagdasarian, Z., Pretz, J., Rosenthal, M., Schmidt, V., Semertzidis, Y., Senichev, Y., Shmakova, V., Silenko, A., Slim, Jamal S., Soltner, H., Stahl, Achim, Bai, M., Stassen, R., Stephenson, E., Stockhorst, H., Ströher, H., Tabidze, M., Tagliente, G., Talman, R., Thörngren-Engblom, P., Trinkel, Fabian, Uzikov, Yu., Barion, L., Valdau, Yu., Valetov, E., Vassiliev, A., Weidemann, C., Wrońska, A., Wüstner, P., Zuprański, P., Zurek, M., JEDI Collaboration, Berz, M., Chekmenev, Stanislav, and Ciullo, G.
- Subjects
Accelerator Physics (physics.acc-ph) ,Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,magnetic moment ,beam dynamics ,experimental methods ,Physics and Astronomy (miscellaneous) ,dipole [magnetic moment] ,Socio-culturale ,FOS: Physical sciences ,Juelich COSY PS ,Big Bang Nucleosynthesis ,Beam diagnostics ,01 natural sciences ,error [magnetic field] ,0103 physical sciences ,magnetic field: error ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,angular distribution ,ddc:530 ,Nuclear Experiment (nucl-ex) ,010306 general physics ,rotation [spin] ,Nuclear Experiment ,spin: rotation ,Spin-½ ,Physics ,electric moment [charged particle] ,Baryogenesis and Leptogenesis ,Spins ,Magnetic moment ,010308 nuclear & particles physics ,background ,magnetic moment: dipole ,Beam dynamics ,electric moment ,charged particle: electric moment ,Instrumentation and Detectors (physics.ins-det) ,Surfaces and Interfaces ,sensitivity ,Charged particle ,Computational physics ,Magnetic field ,Dipole ,lcsh:QC770-798 ,Physics - Accelerator Physics ,Magnetic dipole ,Storage ring - Abstract
Precision experiments, such as the search for electric dipole moments of charged particles using storage rings, demand for an understanding of the spin dynamics with unprecedented accuracy. The ultimate aim is to measure the electric dipole moments with a sensitivity up to 15 orders in magnitude better than the magnetic dipole moment of the stored particles. This formidable task requires an understanding of the background to the signal of the electric dipole from rotations of the spins in the spurious magnetic fields of a storage ring. One of the observables, especially sensitive to the imperfection magnetic fields in the ring is the angular orientation of stable spin axis. Up to now, the stable spin axis has never been determined experimentally, and in addition, the JEDI collaboration for the first time succeeded to quantify the background signals that stem from false rotations of the magnetic dipole moments in the horizontal and longitudinal imperfection magnetic fields of the storage ring. To this end, we developed a new method based on the spin tune response of a machine to artificially applied longitudinal magnetic fields. This novel technique, called \textit{spin tune mapping}, emerges as a very powerful tool to probe the spin dynamics in storage rings. The technique was experimentally tested in 2014 at the cooler synchrotron COSY, and for the first time, the angular orientation of the stable spin axis at two different locations in the ring has been determined to an unprecedented accuracy of better than $2.8\mu$rad., Comment: 32 pages, 15 figures, 7 tables
- Published
- 2017
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