IPAC'10 - List of Authors (Kirkman, I.)

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Kirkman, I.

Paper	Title	Page
THPE036	Tune Measurement in Non Scaling FFAG EMMA with Model Independent Analysis	4596
	Y. Giboudot Brunel University, Middlesex I. Kirkman, A. Wolski The University of Liverpool, Liverpool
	The Non Scaling Fixed Field Alternating Gradient (NS-FFAG) EMMA accelerator has a purely linear lattice and thus allows important tune variation. The crossing of resonances during acceleration is a key characteristic of the beam dynamics. An accurate measurement of the tune is therefore mandatory. However commonly used measurement techniques requires the beam to perform an important number of turns in the machine. Simulations have shown that fast decoherence of the beam requires the study of another measurement technique. The model independent analysis (MIA) has been investigated. The singular value decomposition (SVD) of a matrix composed of simulated BPMs reading of various bunches trajectories gives a description of the optics function at each Beam Position Monitor. Including misalignment errors and electronic noise, an accurate value of the tune has been derived from statistical treatment repeating this process few hundreds of time. yoel.giboudot@stfc.ac.uk

Paper

Title

Page

THPE036

Tune Measurement in Non Scaling FFAG EMMA with Model Independent Analysis

4596

Y. Giboudot
Brunel University, Middlesex
I. Kirkman, A. Wolski
The University of Liverpool, Liverpool

The Non Scaling Fixed Field Alternating Gradient (NS-FFAG) EMMA accelerator has a purely linear lattice and thus allows important tune variation. The crossing of resonances during acceleration is a key characteristic of the beam dynamics. An accurate measurement of the tune is therefore mandatory. However commonly used measurement techniques requires the beam to perform an important number of turns in the machine. Simulations have shown that fast decoherence of the beam requires the study of another measurement technique. The model independent analysis (MIA) has been investigated. The singular value decomposition (SVD) of a matrix composed of simulated BPMs reading of various bunches trajectories gives a description of the optics function at each Beam Position Monitor. Including misalignment errors and electronic noise, an accurate value of the tune has been derived from statistical treatment repeating this process few hundreds of time.

yoel.giboudot@stfc.ac.uk