Phase Locking the Spin Precession in a Storage Ring

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Title
Phase Locking the Spin Precession in a Storage Ring
Author(s)
N. Hempelmann; V. Hejny; J. Pretz; E. Stephenson; W. Augustyniak; Z. Bagdasarian; M. Bai; L. Barion; M. Berz; S. Chekmenev; G. Ciullo; S. Dymov; F.-J. Etzkorn; D. Eversmann; M.O. Gaisser; R. Gebel; K. Grigoryev; D. Grzonka; G. Guidoboni; T. Hanraths; D. Heberling; 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; N.N. Nikolaev; A. Pesce; D. Prasuhn; F. Rathmann; M. Rosenthal; A. Saleev; V. Schmidt; Yannis K. Semertzidis; V. Shmakova; A. Silenko; J. Slim; H. Soltner; A. Stahl; R. Stassen; 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 LETTERS, v.119, no.1, pp.014801 -
Publisher
AMER PHYSICAL SOC
Abstract
This Letter reports the successful use of feedback from a spin polarization measurement to the revolution frequency of a 0.97 GeV/c bunched and polarized deuteron beam in the Cooler Synchrotron (COSY) storage ring in order to control both the precession rate (≈121 kHz) and the phase of the horizontal polarization component. Real time synchronization with a radio frequency (rf) solenoid made possible the rotation of the polarization out of the horizontal plane, yielding a demonstration of the feedback method to manipulate the polarization. In particular, the rotation rate shows a sinusoidal function of the horizontal polarization phase (relative to the rf solenoid), which was controlled to within a 1 standard deviation range of σ=0.21 rad. The minimum possible adjustment was 3.7 mHz out of a revolution frequency of 753 kHz, which changes the precession rate by 26 mrad/s. Such a capability meets a requirement for the use of storage rings to look for an intrinsic electric dipole moment of charged particles. © 2017 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/3852
ISSN
0031-9007
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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