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Particle diffusion from resonance islands in ALADDIN at SRC

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11 Author(s)
Liu, J. ; Argonne Nat. Lab., IL, USA ; Crosbie, E. ; Teng, L. ; Bridges, J.
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The dynamics of the beam in the resonance islands was studied on the electron storage ring ALADDIN at the Synchrotron Radiation Center (SRC). We especially studied the horizontal third- and fourth-integral resonances driven by sextupole fields in the first and second order. A fast kicker was fired to kick the beam into one of the outboard stable islands. The beam took on a quasi-Gaussian distribution and slowly diffused out of the island. The diffusion rate and its dependence on the strengths of the driving sextupoles and the chromaticity sextupoles were measured by tracing the resonance peak of the betatron oscillation on the spectrum analyzer. Beam positions were also recorded through the data acquisition device which was clocked by a pulse-delay circuitry. Interesting results are shown and compared with numerical calculations

Published in:

Particle Accelerator Conference, 1993., Proceedings of the 1993

Date of Conference:

17-20 May 1993