Experimental Results from LEIR Schottky System

The high density Lead ion beams, needed for LHC, are obtained in the Low Energy Ion Ring (LEIR) at CERN by multi-turn injection followed by electron cooling and stacking. During this injection and stacking phases, where the circulating beam is unbunched, diagnostics with Schottky noise are used for probing essential beam parameters, such as tune, momentum spread, emittance and their evolution with time… LEIR is presented in the frame of the LHC ion accelerator chain. Schottky noise physics is briefly introduced and signal-to-noise estimates are given. Then the hardware facility and some results obtained since the machine commissioning in 2005 are described.