The EDM Polarimeter Development at COSY-Jülich

Müller, Fabian

Poster (Invited)

FZJ-2019-01538

The EDM Polarimeter Development at COSY-Jülich

Müller, F. (Corresponding author)FZJ*

2018

SSP18, Aachen, RWTH Aachen, Germany, 11 Jun 2018 - 15 Jun 2018

Please use a persistent id in citations: http://hdl.handle.net/2128/22382

Abstract: The JEDI (Jülich Electric Dipole moment Investigations) collaboration performsa set of experiments at the COSY storage ring in Jülich, within the R&D phaseto search for the Electric Dipole Moments (EDMs) of charged particles. Ameasurement of proton and deuteron EDMs is a sensitive probe of yetunknown CP violation. An EDM observation would also be an indication forphysics beyond the Standard Model.The method of charged particle EDM search will exploit stored polarized beamsin order to observe a miniscule rotation of the polarization axis as a function oftime due to the interaction of a finite EDM with large electric fields. Keychallenge is the provision of a sensitive and efficient method to determine thetiny change of the beam polarization. Elastic scattering of the beam particleson carbon nuclei will provide the polarimetry reaction.To perform these measurement, an EDM polarimeter needs to be developed.The polarimetry concept developed within the JEDI collaboration is based on aheavy crystal (LYSO) hadron calorimeter. LYSO as a fast, dense and radiationhard, novel scintillating material was chosen to fulfill these specifications. Thepolarimeter is designed in a compact and modular fashion consisting ofmodules made from LYSO crystals coupled to silicon photomultipliers (SiPM).On overview on the development of this polarimeter will given in this posterpresentation.

Keyword(s): Particle Physics (2nd)

Contributing Institute(s):