IPAC2014 - List of Authors (Pichoff, N.)

Paper	Title	Page
THPME056	A Space-charge Compatible "Tomography" of Beam Phase-space Distributions	3358
	N. Pichoff CEA/DSM/IRFU, France A. Lasheen CERN, Geneva, Switzerland
	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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME056
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THPME057	Calculations of Halo in TraceWin Code	3361
	N. Pichoff, P.A.P. Nghiem, D. Uriot CEA/DSM/IRFU, France M. Valette CEA/IRFU, Gif-sur-Yvette, France
	The TraceWIN code is used to simulate the dynamics of the particles and to design linear particle accelerators. The growth of rms emittance along the accelerator is often used to estimate the quality of a design. For high beam powers, the aim is also to limit the production of halo in order to keep particle losses under a requested limit. We present in this article the different ways to quantify this halo in TraceWin.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME057
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

A Space-charge Compatible "Tomography" of Beam Phase-space Distributions

3358

N. Pichoff
CEA/DSM/IRFU, France
A. Lasheen
CERN, Geneva, Switzerland

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.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME056

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPME057

Calculations of Halo in TraceWin Code

3361

N. Pichoff, P.A.P. Nghiem, D. Uriot
CEA/DSM/IRFU, France
M. Valette
CEA/IRFU, Gif-sur-Yvette, France

The TraceWIN code is used to simulate the dynamics of the particles and to design linear particle accelerators. The growth of rms emittance along the accelerator is often used to estimate the quality of a design. For high beam powers, the aim is also to limit the production of halo in order to keep particle losses under a requested limit. We present in this article the different ways to quantify this halo in TraceWin.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME057

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)