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19 March 2024
 
  » arxiv » 1504.0635

 Article overview


New method for a continuous determination of the spin tune in storage rings and implications for precision experiments
D. Eversmann ; V. Hejny ; F. Hinder ; A. Kacharava ; J. Pretz ; F. Rathmann ; M. Rosenthal ; F. Trinkel ; S. Andrianov ; W. Augustyniak ; Z. Bagdasarian ; M. Bai ; W. Bernreuther ; S. Bertelli ; M. Berz ; J. Bsaisou ; S. Chekmenev ; D. Chiladze ; G. Ciullo ; M. Contalbrigo ; J. de Vries ; S. Dymov ; R. Engels ; F.M. Esser ; O. Felden ; M. Gaisser ; R. Gebel ; H. Glückler ; F. Goldenbaum ; K. Grigoryev ; D. Grzonka ; G. Guidoboni ; C. Hanhart ; D. Heberling ; N. Hempelmann ; J. Hetzel ; R. Hipple ; D. Hölscher ; A. Ivanov ; V. Kamerdzhiev ; B. Kamys ; I. Keshelashvili ; A. Khoukaz ; I. Koop ; H-J. Krause ; S. Krewald ; A. Kulikov ; A. Lehrach ; P. Lenisa ; N. Lomidze ; B. Lorentz ; P. Maanen ; G. Macharashvili ; A. Magiera ; R. Maier ; K. Makino ; B. Marianski ; D. Mchedlishvili ; Ulf-G. Meißner ; S. Mey ; A. Nass ; G. Natour ; N. Nikolaev ; M. Nioradze ; A. Nogga ; K. Nowakowski ; A. Pesce ; D. Prasuhn ; J. Ritman ; Z. Rudy ; A. Saleev ; Y. Semertzidis ; Y. Senichev ; V. Shmakova ; A. Silenko ; J. Slim ; H. Soltner ; A. Stahl ; R. Stassen ; M. Statera ; E. Stephenson ; H. Stockhorst ; H. Straatmann ; H. Ströher ; M. Tabidze ; R. Talman ; P. Thörngren Engblom ; A. Trzcinski ; Yu. Uzikov ; Yu. Valdau ; E. Valetov ; A. Vassiliev ; C. Weidemann ; C. Wilkin ; A. Wirzba ; A. Wronska ; P. Wüstner ; M. Zakrzewska ; E. Zaplatin ; P. Zupranski ; D. Zyuzin ;
Date 2 Apr 2015
AbstractA new method to determine the spin tune is described and tested. In an ideal planar magnetic ring, the spin tune - defined as the number of spin precessions per turn - is given by $ u_s = gamma G$ (gamma is the Lorentz factor, $G$ the magnetic anomaly). For 970 MeV/c deuterons coherently precessing with a frequency of ~120 kHz in the Cooler Synchrotron COSY, the spin tune is deduced from the up-down asymmetry of deuteron carbon scattering. In a time interval of 2.6 s, the spin tune was determined with a precision of the order $10^{-8}$, and to $1 cdot 10^{-10}$ for a continuous 100 s accelerator cycle. This renders the presented method a new precision tool for accelerator physics: controlling the spin motion of particles to high precision is mandatory, in particular, for the measurement of electric dipole moments of charged particles in a storage ring.
Source arXiv, 1504.0635
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