Development of compact highly sensitive beam position monitors for storage rings

Abstract

The history of the search for electric dipole moment (EDM)takes us back in time for more than five decades. EDMs have gained interest due to the fact that they violate the CP symmetry. Hence, they potentially provide additional sources of CP violation and possibly contribute to the resolution of one of the greatest puzzles of cosmology; mainly to explain the matter abundance in the universe. The JEDI collaboration is currently preparing for measuring the Deuteron EDM in the COoler SYnchrotron (COSY). One of the major challenges is the precise knowledge about the beam position along the storage ring. Transverse beam positions largely control the systematic errors. Thus the development of compact and highly sensitive Beam Position Monitors (BPMs) is particularly important for precision experiment like the EDM searches. This paper describes the development of the latest set of Rogowski coils as compact beam position monitors. It also describes some of the preliminary results towards optimizing the sensitivity of these coils by controlling the noise sources and approaching improved signal to noise ratio (SNR).