Author: Damjanovic, S.
Paper Title Page
MOPWA035 Beam Loss Studies for the CERN PS Booster using FLUKA 744
  • S. Damjanovic, B. Dehning, B. Mikulec, M. Sapinski
    CERN, Geneva, Switzerland
  In view of future upgrade plans, the beam loss monitor (BLM) coverage of the PS Booster (PSB) rings was reviewed. The response of two types of monitors, LHC-IC and LHC-LIC, has been studied with FLUKA at LINAC4 injection and PSB extraction energies. The goal of this study was to find out whether the current beam loss monitor coverage of two monitors at a certain location per PSB section was adapted to potential beam losses associated with a future Linac4 injection. The outcome of this study was a proposal to double the number of beam loss monitors in the PSB section by using a combination of horizontally oriented LHC-IC and LHC-LIC type monitors.  
WEPEA042 The PS Upgrade Programme: Recent Advances 2594
  • S.S. Gilardoni, S. Bart Pedersen, C. Bertone, N. Biancacci, A. Blas, D. Bodart, J. Borburgh, P. Chiggiato, H. Damerau, S. Damjanovic, J.D. Devine, T. Dobers, M. Gourber-Pace, S. Hancock, A. Huschauer, G. Iadarola, L.A. Lopez Hernandez, A. Masi, S. Mataguez, E. Métral, M.M. Paoluzzi, S. Persichelli, S. Pittet, S. Roesler, C. Rossi, G. Rumolo, B. Salvant, R. Steerenberg, G. Sterbini, L. Ventura, J. Vollaire, R. Wasef, C. Yin Vallgren
    CERN, Geneva, Switzerland
  • M. Migliorati
    University of Rome "La Sapienza", Rome, Italy
  The LHC Injectors Upgrade project (LIU) has been initiated to improve the performances of the existing injector complex at CERN to match the future requirements of the HL-LHC. In this framework, the Proton Synchrotron (PS) will undergo fundamental changes for many of its main systems: the injection energy will be increased to reduce space-charge effects, the transverse damper will be improved to cope with transverse instabilities the RF systems will be upgraded to accelerate higher beam intensity and brightness. These hardware improvements are triggered by a series of studies meant to identify the most critical performance bottlenecks, like space charge, impedances, longitudinal and transverse instabilities, as well as electron-cloud. Additionally, alternative production schemes for the LHC-type beams have been proposed and implemented to circumvent some of the present limitations. A summary of the most recent advances of the studies, as well as the proposed hardware improvements is given.  
WEPEA057 Numerical Simulations to Evaluate the Performance of CERN PS Dummy Septum to Reduce Irradiation for the Multi-Turn Extraction 2636
  • C. Hernalsteens, S. Damjanovic, S.S. Gilardoni, M. Giovannozzi
    CERN, Geneva, Switzerland
  The losses created by the proposed Multi-Turn Extraction (MTE) at the CERN PS induces high activation of the magnetic extraction septum due to the de-bunched longitudinal beam structure requested to transfer the beam to the SPS. A mitigation measure is under study aiming at localizing losses in a well-shielded area by shadowing the magnetic extraction septum thanks to septum-like passive device. Such a solution is based on a so-called dummy septum, a blade which absorbs particles during the rise time of the extraction kickers for MTE beams. The efficiency of the scheme is presented in this paper. The quantitative estimate is based on detailed simulations that analyse the beam-matter interaction and provide a determination of the shadowing effect of the dummy septum.