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MOSBI1 Automatic Computer Algorithms for Beam-based Setup of the LHC Collimators alignment, injection, collimation, controls 15
 
  • G. Valentino, N.J. Sammut
    University of Malta, Information and Communication Technology, Msida, Malta
  • R.W. Aßmann, R. Bruce, S. Redaelli, B. Salvachua, D. Wollmann
    CERN, Geneva, Switzerland
 
  Funding: FP7 EuCARD - WP8 ColMat
Beam-based setup of the LHC collimators is necessary to establish the beam centers and beam sizes at the collimator locations and determine the operational settings during various stages of the LHC machine cycle. Automatic software algorithms have been successful in reducing the costly beam time required for the alignment, as well as significantly reducing human error. In this paper, the beam-based alignment procedure is described, and the design of algorithms such as a BLM feedback loop, parallel collimator alignment, pattern recognition of BLM loss spikes, automatic loss threshold selection and coarse BPM-interpolation guided alignment is explained. A comparison on the alignment results from the 2010 to the 2012 LHC runs is presented to illustrate the improvements achieved with the automatic algorithms.
 
slides icon Slides MOSBI1 [10.572 MB]  
 
THSCC3 On Accelerator Driven Subcritical Reactor Power Gain neutron, target, proton, coupling 259
 
  • A.G. Golovkina, I.V. Kudinovich, D.A. Ovsyannikov
    St. Petersburg State University, St. Petersburg, Russia
 
  The accelerator driven system (ADS) with subcritical reactor is considered. Such systems demonstrate high safety, due to the fact, that the reactor operates at sub-critical level. The problem of the reactor power rate maximiztion on fixed values of effective multiplication factor and the external neutron supply (neutron generating target) intensity is studied. In this paper the main attention is paid to the reactor core optimization. Some ways of ADS power rate gain and optimized reactor core parameters are proposed.  
slides icon Slides THSCC3 [1.857 MB]