Author: Fielder, R.T.
Paper Title Page
TUPC11 Beam-Based Measurement of ID Taper Impedance at Diamond 380
  • V.V. Smaluk, R. Bartolini, R.T. Fielder, G. Rehm
    Diamond, Oxfordshire, United Kingdom
  New insertion devices (IDs) are being designed now for a Diamond upgrade. One of the important topics of the design is the coupling impedance of the ID vacuum chamber movable tapers. To get a complete and reliable information of the impedance, analytical estimations, numerical simulation and beam-based measurement have been performed. The impedance of an existing ID taper geometrically similar to the new one has been measured using the orbit bump method. It turns out that in spite of the small magnitude (a few um) of orbit distortion to be observed in this case, the BPM resolution is sufficient for this measurement. The measurement results in comparison with simulation data are discussed in this paper.