Beams Document 3994-v1

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SNS Accumulator Ring Instability Damper and Beam Transfer Function Studies

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Camille M. Ginsburg
Updated by:
Camille M. Ginsburg
Document Created:
10 Nov 2011, 16:10
Contents Revised:
10 Nov 2011, 16:10
Metadata Revised:
10 Nov 2011, 16:10
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Simulation predictions and measurements of the SNS proton accumulator ring for the final design intensities indicate the existence of an electron-proton (e-p) instability. A feedback/damper system was designed to mitigate the e-p instability and experiments to determine the effectiveness of the prototype analog system have been performed. While damping has been achieved, supplemental Beam Transfer Function (BTF) measurements utilizing the feedback/damper system have also been conducted to ascertain the system limitations as well as for use as a standalone beam diagnostic. The feedback/damper system will be described, current damping results will be highlighted, and the BTF measurement will be described. A conclusion with the measurements of the SNS ring tune and chromaticity will be presented.
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