Author: Herranz, J.
Paper Title Page
TUPB052 Wire Scanners and Vibrations - Models and Measurements 1
 
  • J. Herranz, B. Dehning, E. Effinger, J. Emery, A. Guerrero, C. Pereira
    CERN, Geneva, Switzerland
  • A. Barjau, J. Herranz
    Universitat Politécnica de Catalunya, Barcelona, Spain
  • J. Herranz
    Proactive Research and Development, Barcelona, Spain
 
  The new fast wire scanner foreseen to measure small emittance beams throughout the LHC injector chain will have a wire travelling at a speed of up to 20 m.s−1, with a requested wire position measurement accuracy of the order of a few microns. The vibration of the thin carbon wires used has been identified as one of the major error sources on the wire position accuracy. In this project the most challenging and innovative development has been the wire vibrations measurement strategy based on the piezo resistive effect of the wire itself, while the deflection of the fork supporting the wire has been measured by semiconductor strain gauges. Dynamic models of the wire and fork have been created to predict the behaviour of the fork-wire assembly. This model, validated by the measurements, has then been used for optimisation of the wire-fork assembly. The contribution will discuss the measurement setup and the model development as well as their comparison. In addition it will show that this technology can easily be implemented in current operating devices without major modifications. For the first time the piezo resistive effect is used for wire vibrations measurements during the scan.  
poster icon Poster TUPB052 [2.371 MB]  
 
TUPB061 Experience From the Construction of a New Fast Wire Scanner Prototype for the CERN- SPS and its Optimisation for Installation in the CERN-PS Booster 1
 
  • R. Veness, W. Andreazza, N. Chritin, B. Dehning, J. Emery, D. Gudkov, J. Herranz, P. Magagnin, E. Piselli, S. Samuelsson
    CERN, Geneva, Switzerland
 
  A new design of wire scanner is under development for the LHC Injector Upgrade project at CERN. A prototype has been designed, built and installed in the SPS accelerator to test the concept in an operational accelerator environment. New technology has been developed and qualified for in-vacuum motor and structural components using 3D metal additive machining. This paper will describe the technology developed for this scanner and the test results to date. This prototype has recently been re-optimised to fit in the limited space available in the PS Booster rings. This design will also be presented.  
poster icon Poster TUPB061 [0.866 MB]