PS tunnel : typical section The Engineer (London, England) 17 Aug 1956 1955 1955 Drawing showing the main elements of the future PS tunnel. PS building layout 1956 1956 Drawing of the PS ring and all buildings surrounding it. PS building site 1956 1956 Concrete retaining wall for the "Mount Citron" shield (built to enclose the South Hall western end). PS building site : trial section of the ring building 1956 1956 The earth mound covers a short, straight trial section of the PS ring structure, used to study foundations stability. PS ring : excavation work 1955 1955 Excavation and lean-concrete lining of a first section of the PS ring tunnel. PS ring : foundations for "pendulum" supports 1955 1955 The circular holes will later be drilled through to house the "pendulum" supports for the PS concrete ring foundation. PS ring building Nuclear Engineering (London, England) 1956 1955 1955 View of the interior of the tunnel, before casting the ceiling. PS ring : lower part of the structure 1956 1956 The cylindrical hole will house the drilled column support for the ring structure. PS buildings : reinforced concrete structure for shielding "bridge" pillar 1956 1956 The PS ring traverses the region between the experimental halls South and North (buildings Nos 150 and 151) under massive bridge-shaped concrete beams. This pillar stands at the S-W end of the structure. PS buildings : steel reinforcement for the shielding "bridge" 1956 1956 The left-side abutment of this structure is the pillar seen in photo 392. PS ring building CPS 1956 1956 The concrete ring that will support the machine will be housed in the trench occupying the lower half of the tunnel. PS buildings : detail of the shielding "bridge" 1956 1956 Detail of the bridge, showing the rectangular openings allowing access to the machine. PS : South Hall under construction 1956 1956 View looking N-W. PS buildings : detail of shielding "bridge" 1956 1956 Tensioning of the pre-stressing cables. PS ring foundation on pendulum supports 1956 1956 View showing the heavy steel bar reinforcing, prior to concrete casting. See also photo <a href="https://cds.cern.ch/record/39688">518</a>. PS ring : pendulum supports CPS 1956 1956 The cylindrical shells encase the pendulum bars. See also photo <a href="https://cds.cern.ch/record/39687">516</a>. PS ring building under construction 1956 1956 Area near the junction Linac/Main Ring. See also photo <a href="https://cds.cern.ch/record/39702">581</a>. PS South Hall under construction 1956 1956 Present building 150. Inside view : in the foreground one of the overhead cranes still lying on the floor. <secondary-title/> </titles> <doi/> <pages/> <volume/> <number/> <dates> <year>1956</year> <pub-dates> <date>1956</date> </pub-dates> </dates> <abstract/> </record> <record> <contributors/> <titles> <title>PS building : view of the so-called South Hall 1956 1956 View looking East : the South Hall is present building 150. PS South Hall : internal view during construction 1957 1957 South Hall (present Hall 150) with all sorts of technical installations under way. PS ring building : junction Linac to Main Ring 1957 1957 View looking N-W. See also photo <a href="https://cds.cern.ch/record/39690">532</a>. Inside the PS ring tunnel Industries Atomiques : 1 Apr 1957 CPS 1958 1958 The ring is ready to receive its first magnet units. Note survey pillar and radius - measuring invar wire. Mounting of the excitation windings on the PS magnet units CPS CPS 1958 1958 The windings were manufactured by ACEC (Belgium) : their personnel assisted CERN for the assembling. PS ring CPS 1959 1959 This sector of the PS appears nearly ready for beam tests.