COSY Proposal and Beam Request Commissioning and Initial Research with the Polarised Internal Deuterium Gas Target at ANKE ( COSY Experiment # 201 )

The current proposal and beam request concerns the final commissioning of the Polarised Internal Target (PIT) with deuterium gas and the start-up of the double– polarised research phase of the pn–programme at ANKE. It will include measurements of the vector and tensor polarisations of the deuterium gas target by nuclear reactions. The dependence of the polarisation along the storage cell will be measured as well. The anticipated physics programme of singleand double-polarisation measurements with the deuterium gas target and (un)polarised proton beam is briefly outlined, as well as the results of the previous commissioning run (COSY exp. #201.0). The time line for the further commissioning tasks is presented. For the activities outlined in the proposal, two weeks of beam time are requested with unpolarised proton beam with kinetic energy of Tp=600 MeV.