No abstract available

[en] Based on past experience (2010/2011), in particular expected limitations from beam-beam effects, and taking into account the expected beam quality from the LHC injectors, the peak and integrated luminosity at top energy is discussed for different scenarios (e.g. bunch spacing, beta*). In particular it will be shown which are the key parameters to reach the nominal luminosity and it is also shown that peak luminosities two times larger than nominal (or higher) are possible. Possible test in 2012 are discussed

[en] The MOPS data structure management system has been developed for the LEP/SPS control system and is designed to support the programmers in organizing their data in a structured fashion. MOPS data structures can be accessed from FORTRAN 77 as well as from C programs and therefore allow the easy exchange of data between programs written in different languages. The data structure contains a full description of all data elements and their logical relations and simplifies the transfer across networks with different computer systems and data representations. A description of the data structure and the basic philosophy are presented. 5 refs

[en] For the Large Hadron Collider in the LEP tunnel (LHC) a non-zero crossing angle is foreseen to avoid multiple collisions outside the interaction point. The two beams can however suffer from long range beam-beam interactions during the time they are in one common vacuum chamber. These long range interactions can excite coherent beam-beam modes and due to the finite separation they are in general non-linear leading to possible coherent resonances of higher order. A computer simulation has been developed and was used to investigate this coherent beam-beam effect. Possible constraints on the LHC parameters are investigated and discussed

No abstract available

No abstract available

[en] In age determination work by counting fission tracks the precision, besides the statistical counting error of spontaneous and induced tracks, largely depends on exact determination of the neutron dose and close maintenance of etching conditions. Slight variations in temperature and concentrations of etch batches may lead to considerable deviations. By dating several 'Early Victorian' U-stained glasses the authors discovered the fact that the spontaneous fission decay constant λ_sp.f. is still not known with sufficient accuracy. Since an age of ≤ 150 yr can be inferred from the style of these glasses, the most probable value of λ_sp.f. should lie closely to 8 x 10^-17 yr^-1. In establishing the coincidence of two geological events the uncertainty of λ_sp.f. may be less important. The authors were able to confirm the agreement in the age of moldavites (14.9 ± 1.6) x 10⁶ yr and the Ries Crater glass (14.9 ± 1.5) x 10⁶ yr. (author)

No abstract available

[en] This paper reports on the SPS designed to accelerate protons up to 450 GeV and to eject the particles to fixed target experiments. Nowadays it also operates as a p bar p collider with constant or pulsing energy, as an ion synchrotron (O⁸, S¹⁶) and in the future it will serve as an electron/positron injector for LEP. The total operational time must be used in the most efficient way. By interleaving the lepton cycles between the cycles to accelerate protons or ions, the lepton acceleration can be achieved with very little perturbations to the fixed target physics program. In addition, changing the mode of operation should be possible without substantial delays. The control system must allow multicycling as well as fast changes of the operational mode. To fulfill these requirements the hardware of the control system was substantially upgraded: a new timing system and new function generators providing the reference functions for various types of equipment replaced a major part of the old equipment, new console computers and a new computer network were added to the old control system

[en] This report presents the proceedings of the Course on Advanced Accelerator Physics organized by the CERN Accelerator School. The course was held in Trondheim, Norway from 18 to 29 August 2013, in collaboration with the Norwegian University of Science and Technology. Its syllabus was based on previous courses and in particular on the course held in Berlin 2003 whose proceedings were published as CERN Yellow Report CERN-2006-002. The field has seen significant advances in recent years and some topics were presented in a new way and other topics were added. The lectures were supplemented with tutorials on key topics and 14 hours of hands on courses on Optics Design and Corrections, RF Measurement Techniques and Beam Instrumentation and Diagnostics. These courses are a key element of the Advanced Level Course