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Valishev, A.

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WEPP037 Independent Component Analysis of Tevatron Turn-by-turn BPM Measurements 2602
 
  • A. V. Petrenko
    BINP SB RAS, Novosibirsk
  • V. A. Lebedev, A. Valishev
    Fermilab, Batavia, Illinois
 
  Transverse dipole coherent beam oscillations in the Tevatron were analyzed with different independent component analysis algorithms. This allowed to obtain the model-independent values of coupled beta-functions as well as betatron phase advance and dispersion along the ring from a single kick measurement. Using a 1-turn shift of turn-by-turn BPM readings for virtual doubling of the number of BPMs it is also possible to measure the fractional part of betatron tunes with high accuracy. Good agreement with the linear optical model of the Tevatron was observed.  
THYM01 Simulation of Beam-beam Effects and Tevatron Experience 2937
 
  • A. Valishev
    Fermilab, Batavia, Illinois
 
  Simulations of beam-beam effects in the Tevatron correctly describe reality, have predictive power and have been used to support a change in the Tevatron working point to near the half integer. The simulation models and tools are discussed, and comparisons made with observations and measurements.  
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THPC074 Observation of Coherent Oscillations of Colliding Bunches at the Tevatron 3158
 
  • A. Valishev, V. Kamerdzhiev, V. A. Lebedev
    Fermilab, Batavia, Illinois
  • F. A. Emanov
    BINP SB RAS, Novosibirsk
 
  Commissioning of the new digital tune monitor (DTM) at the Tevatron made it possible to observe vertical dipole oscillations of individual bunches at any time during an HEP store. Since all the bunches have significantly different collision conditions, this device provides vast possibilities for investigation of coherent beam-beam effects. We present theoretical model and experimental observations of coherent beam-beam modes. Analysis of the DTM data and its agreement with theory are discussed.