LEAR is a multipurpose storage ring located in the South Hall of the Proton Synchrotron (PS), with a circumference of 78.5 m. Four straight sections are alternated with compact 90° bending magnets, along with eight quadrupole doublets. The straight sections each consist of an 8m long section, where equipment such as apparatus for internal beams and electron cooling can be stored, and two short sections of 1m. The C-type (bending) magnets used are open to the outside of the ring for injection and ejection. The vacuum system used for LEAR is designed for baking at 300 °C.