Spin tune mapping as a novel tool to probe the spin dynamics in storage rings

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Title
Spin tune mapping as a novel tool to probe the spin dynamics in storage rings
Author(s)
A. Saleev; N. N. Nikolaev; F. Rathmann; W. Augustyniak; Z. Bagdasarian; M. Bai; L. Barion; M. Berz; S. Chekmenev; G. Ciullo; S. Dymov; D. Eversmann; M. Gaisser; R. Gebel; K. Grigoryev; D. Grzonka; G. Guidoboni; D. Heberling; V. Hejny; N. Hempelmann; J. Hetzel; F. Hinder; A. Kacharava; V. Kamerdzhiev; I. Keshelashvili; I. Koop; A. Kulikov; A. Lehrach; P. Lenisa; N. Lomidze; B. Lorentz; P. Maanen; G. Macharashvili; A. Magiera; D. Mchedlishvili; S. Mey; F. Müller; A. Nass; A. Pesce; D. Prasuhn; J. Pretz; M. Rosenthal; V. Schmidt; Yannis K. Semertzidis; Y. Senichev; V. Shmakova; A. Silenko; J. Slim; H. Soltner; A. Stahl; R. Stassen; E. Stephenson; H. Stockhorst; H. Ströher; M. Tabidze; G. Tagliente; R. Talman; P. Thörngren Engblom; F. Trinkel; Yu. Uzikov; Yu. Valdau; E. Valetov; A. Vassiliev; C. Weidemann; A. Wrońska; P. Wüstner; P. Zuprański; M. Zurek
Publication Date
2017-07
Journal
Physical Review Accelerators and Beams, v.20, no.7, pp.072801 -
Publisher
AMER PHYSICAL SOC
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 spin tune mapping, emerges as a very powerful tool to probe the spin dynamics in storage rings. The technique was experimentally tested in 2014 using polarized deuterons stored in 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 μ rad. © 2017 authors. Published by the American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4056
ISSN
2469-9888
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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