CERN Accelerating science

Published Articles
Title	A Space-charge Compatible "Tomography" of Beam Phase-space Distributions
Author(s)	Pichoff, Nicolas (IRFU, Saclay ; CEA, DSM, Saclay) ; Lasheen, Alexandre (CERN)
Publication	2014
Number of pages	3
In:	5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.THPME056
Subject category	Accelerators and Storage Rings
Abstract	The well-known 3-gradient method allows accessing to a beam RMS emittance and Twiss parameters at a position A by measuring its rms size at a downstream position B with at least 3 different transport conditions from A to B. We suggest extending this method to access to a beam phase-space distribution model at A from beam profiles measured at B. We propose to use an iterative method which consists in: - defining a parametric model describing the beam distribution in 4D transverse phase-space at a position A, - adjusting iteratively the model parameters by minimizing the difference between beam profiles measured at B and these obtained by transporting the beam generated according to the model with TraceWIN code from A to B. This method allows taking into account space-charge and other transport non-linearities.
Copyright/License	publication: (License: CC-BY)

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