Preparing the COSY-ring for a test of time-reversal-invariance

At the cooler synchrotron COSY at Jülich a novel (P-even, T-odd) true null test of time-reversal invariance (TRI) was proposed and accepted, that is supposed to measure TRI to an accuracy of $10−4$ (Phase 1) or $10−6$ (Phase 2). The parity conserving time-reversal violating observable is the total cross-section asymmetry Ay,xz. The measurement is planned as an internal target transmission experiment at the cooler synchrotron COSY. Ay,xz is measured using a polarized beam with an energy of about 1 GeV and a tensor polarized deuteron atomic-beam target.