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Title: Diagnostics of the Fermilab Tevatron using an AC dipole

The Fermilab Tevatron is currently the world's highest energy colliding beam facility. Its counter-rotating proton and antiproton beams collide at 2 TeV center-of-mass. Delivery of such intense beam fluxes to experiments has required improved knowledge of the Tevatron's beam optical lattice. An oscillating dipole magnet, referred to as an AC dipole, is one of such a tool to non-destructively assess the optical properties of the synchrotron. We discusses development of an AC dipole system for the Tevatron, a fast-oscillating (f ~ 20 kHz) dipole magnet which can be adiabatically turned on and off to establish sustained coherent oscillations of the beam particles without affecting the transverse emittance. By utilizing an existing magnet and a higher power audio amplifier, the cost of the Tevatron AC dipole system became relatively inexpensive. We discuss corrections which must be applied to the driven oscillation measurements to obtain the proper interpretation of beam optical parameters from AC dipole studies. After successful operations of the Tevatron AC dipole system, AC dipole systems, similar to that in the Tevatron, will be build for the CERN LHC. We present several measurements of linear optical parameters (beta function and phase advance) for the Tevatron, as well as studies ofmore » non-linear perturbations from sextupole and octupole elements.« less
Authors:
 [1]
  1. Univ. of Texas, Austin, TX (United States)
Publication Date:
OSTI Identifier:
940843
Report Number(s):
FERMILAB-THESIS--2008-48
TRN: US0807217
DOE Contract Number:
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTIPROTON BEAMS; CERN LHC; COLLIDING BEAMS; DIPOLES; FERMILAB TEVATRON; MAGNETS; OCTUPOLES; OPTICAL PROPERTIES; OSCILLATIONS; PROTONS Accelerators