Author: Krupa, M.
Paper Title Page
WEPF06 A New Integrating Current Transformer for the LHC 540
 
  • L. Søby, D. Belohrad, M. Krupa, P. Odier
    CERN, Geneva, Switzerland
  • J.F. Bergoz, F. Stulle
    BERGOZ Instrumentation, Saint Genis Pouilly, France
 
  The existing fast beam current transformers of the LHC have been shown to exhibit both bunch length and bunch position dependency. A new Integrating Current Transformer (ICT) have therefore been developed in collaboration with Bergoz Instrumentation to address these issues. As goals a 0.1 %/mm beam position dependency and 0.1 % bunch length dependency were specified, along with a bandwidth of 100 MHz. This paper describes the principles of ICT operation and presents the laboratory measurement results obtained with the first prototypes at CERN.  
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WEPF18 Precise Digital Integration of Fast Analogue Signals Using a 12-Bit Oscilloscope 584
 
  • M. Krupa, M. Gąsior
    CERN, Geneva, Switzerland
 
  An accurate laboratory characterization of beam intensity monitors requires a reliable integration of analogue signals simulating beam pulses. This poses particular difficulties when a high integration resolution is necessary for short pulses. However, the recent availability of fast 12-bit oscilloscopes now makes it possible to perform precise digital integration of nanosecond pulses using such instruments. This paper describes the methods and results of laboratory charge measurements performed at CERN using a 12-bit oscilloscope with 1 GHz analogue bandwidth and 2.5 GS/s sampling.  
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