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Zhang, X.

Paper Title Page
TPAP032 Beam-beam Effects in the Tevatron Run II 2245
 
  • V.D. Shiltsev, Y. Alexahin, V. Lebedev, P. Lebrun, R. Moore, T. Sen, A. Valishev, X. Zhang
    Fermilab, Batavia, Illinois
  
  Funding: Work supported by the Universities Research Assos., Inc., under contract DE-AC02-76CH03000 with the U.S. Dept. of Energy.

The Tevatron in Collider Run II (2001-present) is operating with many times higher beam intensities and luminosities than in previous Run I (1992-1995). Electromagnetic long-range and head-on interactions of high intensity proton and antiproton beams have been significant sources of beam loss and lifetime limitations. We present observations of the beam-beam phenomena in the Tevatron and results of relevant beam studies. We analyze the data and various methods employed in operations, predict the performance at upgraded beam parameters and luminosity and discuss possible improvements.

 
TPAP033 Tevatron Admittance Measurement 2306
 
  • X. Zhang, V.D. Shiltsev, C.-Y. Tan
    Fermilab, Batavia, Illinois
  
  Funding: Work supported by the Universities Research Assos., Inc., under contract DE-AC02-76CH03000 with the U.S. Dept. of Energy.

We measured the Tevatron Beam Acceptance by the method of exciting the beam emittance growth with the beam tickling system with noise. The noise power was about 3Watt with 100Hz bandwidth and centered either in horizontal betatron frequency or vertical betatron frequency. We were able to blow the beam emittance fast while under control. From the point the beam emittance stop growing, we measured the beam acceptance of the Tevatron.

 
WPAE029 Tevatron Beam-beam Compensation Project Progress 2083
 
  • V.D. Shiltsev, R.J. Hively, V. Kamerdzhiev, A. Klebaner, G.F. Kuznetsov, A. Martinez, H. Pfeffer, G.W. Saewert, A. Semenov, D. Wolff, X. Zhang
    Fermilab, Batavia, Illinois
  • K. Bishofberger
    UCLA, Los Angeles, California
  • I. Bogdanov, E. Kashtanov, S. Kozub, V. Sytnik, L. Tkachenko
    IHEP Protvino, Protvino, Moscow Region
  • A.V. Kuzmin, M.A. Tiunov
    BINP SB RAS, Novosibirsk
  • F. Zimmermann
    CERN, Geneva
  
  Funding: Work supported by the Universities Research Assos., Inc., under contract DE-AC02-76CH03000 with the U.S. Dept. of Energy.

The 2nd Tevatron electron lens (TEL2) is under the final phase of development and prepare for the installation in the Tevatron. In this report, we will describe the system and the main upgrades from the TEL1. We will also show the magnetic field measurement results, beam testing and plan for installation. The special operation consideration of the TEL2 under high radiation dose will also be discussed.