Author: Reeg, H.
Paper Title Page
WECZB1 A SQUID-Based Beam Current Monitor for FAIR/CRYRING 510
 
  • R. Geithner, T. Stöhlker
    IOQ, Jena, Germany
  • R. Geithner, T. Stöhlker
    HIJ, Jena, Germany
  • F. Kurian, H. Reeg, M. Schwickert, T. Stöhlker
    GSI, Darmstadt, Germany
  • R. Neubert, P. Seidel
    FSU Jena, Jena, Germany
 
  A SQUID-based beam current monitor was developed for the upcoming FAIR-Project, providing a non-destructive online monitoring of the beam currents in the nA-range. The Cryogenic Current Comparator (CCC) was optimized for a lowest possible noise-limited current resolution together with a high system bandwidth. This CCC should be installed in the CRYRING facility, working as a test bench for FAIR. In this contribution we present results of the completed CCC for FAIR/CRYRING and also arrangements that have been done for the installation of the CCC at CRYRING, regarding the cryostat design.  
slides icon Slides WECZB1 [6.109 MB]  
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WEPF31 Sensor Studies for DC Current Transformer Application 624
 
  • E. Soliman, K. Hofmann
    TU Darmstadt, Darmstadt, Germany
  • H. Reeg, M. Schwickert
    GSI, Darmstadt, Germany
 
  DC Current Transformers (DCCTs) are known since decades as non-intercepting standard tools for online beam current measurement in synchrotrons and storage rings. In general, the measurement principle of commonly used DCCTs is to introduce a modulating AC signal for a pair of ferromagnetic toroid. A passing DC ion beam leads to an asymmetric shift of the hysteresis curves of the toroid pair. However, a drawback for this measurement principle is found at certain revolution frequencies in ring accelerators, when interference caused by the modulating frequency and its harmonics leads to inaccurate readings by the DCCT. Recent developments of magnetic field sensors allow for new approaches towards a DCCT design without using the modulation principle. This paper shows a review of different kinds of usable magnetic sensors, their characteristics and how they could be used in novel DCCT instruments.  
poster icon Poster WEPF31 [4.396 MB]  
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