Requirements, Challenges, Design, and Functional Specification for the CERN PS2 Vacuum System

In the framework of the CERN accelerator complex upgrade program the construction of a new proton synchrotron (PS2) has been proposed. This paper summarizes the requirements and technical challenges for the PS2 vacuum system including dynamic vacuum effects as electron cloud and ion induced desorption. The PS2 vacuum system design is described comprising the machine sectorisation, the pumping system, vacuum instrumentation, and the bakeout system. Aspects on the interconnect design and machine impedance are discussed. A first vacuum chamber design for the PS2 main magnet system is presented.