Beam-based Diagnostics class at the USPAS 2003 in Santa Barbara
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Beam-based Diagnostics class at the USPAS 2003 in Santa Barbara |
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The class on Beam-based Diagnostics was held June 23-27, 2003 at the Radisson Hotel Santa Barabara, CA. Course credit for this graduate level course was given by the University of California Santa Barabara. Lecturers were:
Beam-Based Diagnostics
UCSB equivalent of 1.5 semester hours of graduate credit
David Robin and Christoph Steier, LBNL; James Safranek, SSRL
Charged particle storage rings are used for a
variety of science and technology applications --- for example as
synchrotron radiation light sources for biology, chemistry, and materials
science, as colliders for high-energy physics or as damping rings to reduce the
beam emittance for linear colliders. To achieve small equilibrium emittances or
to minimize the beam size at the interaction points, strong quadrupoles are
necessary to focus the beam, resulting in large chromatic aberrations. The
correction of those aberrations requires strong sextupoles creating non-linearities,
which can cause the particle motion at large amplitudes to become unstable
(dynamic aperture). The dynamic aperture limits the performance in many current
accelerators. To optimize the performance, a good knowledge of the machine model
is required. To achieve the required accuracy of the machine model, beam based
measurements have proven to be essential.
Prerequisites: understanding of basic accelerator physics, electrodynamics and
classical mechanics.
Instructor Syllabus: We will present beam-based methods for characterizing and controlling the linear and nonlinear optics of a storage ring. We will cover tune, chromaticity, and dispersion measurement; beam-based alignment; orbit response matrix analysis; analysis of turn-by-turn orbit data; beam size measurement; methods of coupling correction; measurement of dynamic aperture; measurement of energy aperture; characterization of resonances; tune shift with amplitude; model independent analysis; and impedance characterization using turn-by-turn and closed orbit measurements. [IU/USPAS P671E]