Author/Authors :
Brantjes، نويسنده , , N.P.M. and Dzordzhadze، نويسنده , , V. and Gebel، نويسنده , , R. and Gonnella، نويسنده , , F. and Gray، نويسنده , , F.E. and van der Hoek، نويسنده , , D.J. and Imig، نويسنده , , A. and Kruithof، نويسنده , , W.L. and Lazarus، نويسنده , , D.M. and Lehrach، نويسنده , , A. and Lorentz، نويسنده , , B. and Messi، نويسنده , , R. and Moricciani، نويسنده , , D. and Morse، نويسنده , , W.M. and Noid، نويسنده , , G.A. and Onderwater، نويسنده , , C.J.G. and ضzben، نويسنده , , C.S. and Prasuhn، نويسنده , , D. and Levi Sandri، نويسنده , , P. and Semertzidis، نويسنده , , Y.K. and da Silva e Silva، نويسنده , , M. and Stephenson، نويسنده , , E.J. and Stockhorst، نويسنده , , H. and Venanzoni، نويسنده , , G. and Versolato، نويسنده , , O.O.، نويسنده ,
Abstract :
This paper reports deuteron vector and tensor beam polarization measurements taken to investigate the systematic variations due to geometric beam misalignments and high data rates. The experiments used the In-Beam Polarimeter at the KVI-Groningen and the EDDA detector at the Cooler Synchrotron COSY at Jülich. By measuring with very high statistical precision, the contributions that are second-order in the systematic errors become apparent. By calibrating the sensitivity of the polarimeter to such errors, it becomes possible to obtain information from the raw count rate values on the size of the errors and to use this information to correct the polarization measurements. During the experiment, it was possible to demonstrate that corrections were satisfactory at the level of 10−5 for deliberately large errors. This may facilitate the real time observation of vector polarization changes smaller than 10−6 in a search for an electric dipole moment using a storage ring.
