Emittance growth in a storage ring due to ground motion
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Description
For a synchrotron light source designed for a small natural emittance, ground motion could lead to a non-negligible growth in emittance. When the ground motion is of the plane-wave type, one can study this dynamical process analytically by employing a method that combines the previously developed transfer function technique with a normal mode analysis that takes into account the magnification of the motion due to magnet supports. The explicit relationship between the amplitudes of the ground vibration and the emittance growth as a function of the vibration frequency is presented. Numerical examples are included. 3 refs., 3 figs., 1 tab.
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Description
For a synchrotron light source designed for a small natural emittance, ground motion could lead to a non-negligible growth in emittance. When the ground motion is of the plane-wave type, one can study this dynamical process analytically by employing a method that combines the previously developed transfer function technique with a normal mode analysis that takes into account the magnification of the motion due to magnet supports. The explicit relationship between the amplitudes of the ground vibration and the emittance growth as a function of the vibration frequency is presented. Numerical examples are included. 3 refs., 3 figs., 1 tab.
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