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Di Girolamo, B.

Paper Title Page
TUPP063 Characterization of the ATLAS Roman Pots Beam Coupling Impedance and Mechanics 1685
 
  • F. Roncarolo, R. M. Jones
    UMAN, Manchester
  • F. Caspers, B. Di Girolamo, T. Kroyer
    CERN, Geneva
 
  At the LHC, four Roman Pot (RP) type detectors will be installed on both sides of the ATLAS experiment with the aim of measuring elastic scattering at very small angles and determining the absolute luminosity at the interaction point. During dedicated LHC runs, the detectors will be positioned at about 1 mm from the nominal beam orbit. Numerical simulations and laboratory measurements were carried out to characterize the RP impact on the total LHC beam coupling impedance. The measurement results assess the effectiveness of RF-absorbing ferrite plates that have been mounted in convenient locations in order to damp high Q resonances of the RP structure. In addition, we review the RP mechanics emphasizing the accuracy and reproducibility of the positioning system.