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Beam extraction studies at 900 GeV using a channeling crystal

R. A. Carrigan, Jr., D. Chen*, G. Jackson, N. Mokhov, and C. T. Murphy†

S. Baker

A. Bogacz‡, D. Cline, S. Ramachandran§, J. Rhoades, and J. Rosenzweig

A. Asseev and V. Biryukov

A. Taratin

J. A. Ellison

A. Khanzadeev, T. Prokofieva, V. Samsonov, and G. Solodov

B. Newberger∥

E. Tsyganov

H.-J. Shih

W. Gabella

B. Cox, V. Golovatyuk**, and A. McManus††

  • Fermi National Accelerator Laboratory, Batavia, Illinois 60510

  • Argonne National Laboratory, Argonne, Illinois 60439

  • University of California at Los Angeles, Los Angeles, California 90024

  • Institute for High Energy Physics, Serpukhov, Russia

  • Joint Institute for Nuclear Research, Dubna, Russia

  • The University of New Mexico, Albuquerque, New Mexico 87131

  • Petersburg Nuclear Physics Institute, Gatchina, Russia

  • The University of Texas, Austin, Texas 78712

  • Southwestern Medical Center, University of Texas at Dallas, Dallas, Texas 75235

  • Superconducting Super Collider, Dallas, Texas 75237

  • Vanderbilt University, Nashville, Tennessee 37235

  • The University of Virginia, Charlottesville, Virginia 22901

  • *Present address: Lucent Technologies, Holmdel, NJ 07733.
  • †Deceased.
  • ‡Present address: Thomas Jefferson National Accelerator Facility, Newport News, VA 23606.
  • §Present address: University of Houston, Houston, TX 77204.
  • ∥Present address: Winstead Sechrest & Minick, P.C., Austin, TX 78701.
  • Present address: Affiliated Computer Services, Inc., Dallas, TX 75204.
  • **Present address: University and INFN of Lecce, Lecce, Italy.
  • ††Present address: Lucent Technologies, Holmdel, NJ 07733.
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Phys. Rev. ST Accel. Beams 5, 043501 – Published 30 April, 2002

DOI: https://doi.org/10.1103/PhysRevSTAB.5.043501

Abstract

Luminosity-driven channeling extraction has been observed for the first time in a 900 GeV study at the Fermilab Tevatron. This experiment, Fermilab E853, demonstrated that useful TeV level beams can be extracted from a superconducting accelerator during high luminosity collider operations without unduly affecting the background at the collider detectors. Multipass extraction was found to increase the efficiency of the process significantly. The beam extraction efficiency was about 25%. Studies of time dependent effects found that the turn-to-turn structure was governed mainly by accelerator beam dynamics. Based on the results of this experiment, it is feasible to construct a parasitic 5–10 MHz proton beam from the Tevatron collider.

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Phys. Rev. ST Accel. Beams 5, 043501– Published 30 April, 2002
  • Received 4 October 1999
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