The EDDA-Detector at the Cooler-Synchrotron COSY/J\"ulich has been operated with an internal CH2 fiber target to measure proton-proton elastic scattering differential cross sections. For the data analysis knowledge of beam parameters, like position, width and angle, are indispensable. We have developed a method to obtain these values with high precision from the azimuthal and polar angles of the ejectiles only, by exploiting the coplanarity of the two final state protons with the beam and the kinematic correlation. The formalism is described and results for beam parameters obtained during beam acceleration are given.
@article{arxiv.nucl-ex/0403043,
title = {Determining Beam Parameters in a Storage Ring with a Cylindrical Hodoscope using Elastic Proton-Proton Scattering},
author = {H. Rohdjess and D. Albers and J. Bisplinghoff and R. Bollmann and K. Buesser and O. Diehl and F. Dohrmann and H. -P. Engelhardt and P. D. Eversheim and M. Gasthuber and J. Greiff and A. Gross and R. Gross-Hardt and F. Hinterberger and M. Igelbrink and R. Langkau and R. Maier and F. Mosel and M. Mueller and M. Muenstermann and D. Prasuhn and P. von Rossen and H. Scheid and N. Schirm and F. Schwandt and W. Scobel and H. J. Trelle and A. Wellinghausen and W. Wiedmann and K. Woller and R. Ziegler},
journal= {arXiv preprint arXiv:nucl-ex/0403043},
year = {2010}
}