Author: Zolkin, T.
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MOPMA040 Analysis of Beam Transverse Instabilities at Fermilab 633
 
  • T. Zolkin
    University of Chicago, Chicago, Illinois, USA
 
  The transverse beam dynamics in Fermilab Recycler ring has been analyzed using SCHARGEV Vlasov solver. In the first part of paper we discuss how SCHARGEV analyses collective instabilities for Gaussian bunch with strong space charge in resistive impedance environment. In the second part the bunched beam dynamics is studied depending on head-tail phase and damper gain. An example for Fermilab Recycler is presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPMA040  
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MOPMA041 Experimental Observation of Head-Tail Modes for Fermilab Booster 636
 
  • T. Zolkin
    University of Chicago, Chicago, Illinois, USA
  • A.V. Burov, V.A. Lebedev
    Fermilab, Batavia, Illinois, USA
 
  The Fermilab Booster is known to suffer from beam transverse instabilities. An experimental attempt of head-tail modes extraction from the stable beam motion by periodic excitement of betatron motion has been performed. The shapes of head-tail modes have been successfully obtained while eigenfrequencies separation from the betatron tune were too small to be resolved. The qualitative agreement between the theory and an experimental data has been demonstrated. This is an important step towards the understanding of general theory of collective instabilities for strong space charge case, which is a rather typical case for hadron machines.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPMA041  
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