Author: Seidel, P.
Paper Title Page
MOPME013 20 Years of Development of SQUID-based Cryogenic Current Comparator for Beam Diagnostics 497
  • W. Vodel
    HIJ, Jena, Germany
  • R. Geithner, R. Neubert, P. Seidel
    FSU Jena, Jena, Germany
  • K.K. Knaack, K. Wittenburg
    DESY, Hamburg, Germany
  • A. Peters
    HIT, Heidelberg, Germany
  • H. Reeg, M. Schwickert
    GSI, Darmstadt, Germany
  This contribution gives an overview on the development of highly sensitive SQUID-based Cryogenic Current Comparators (CCC) for nuclear physics from the first successful demonstration of its performance at GSI Darmstadt through the latest improved version for FAIR and the Cryogenic Storage Ring at MPI Heidelberg. An absolute and exact measurement of the intensity of charged particle beams - extracted from an accelerator or circulating in a Storage Ring - is one of the major problems of beam diagnosis. Also the measurement of so-called dark currents, generated by super-conductive RF accelerator cavities at high voltage gradients to characterize the quality of these components becomes more and more important for the commissioning of new accelerators (XFEL at DESY). The Cryogenic Current Comparator (CCC) based on high precision LTS SQUIDs is an excellent tool to solve these problems.