IPAC2016 - List of Authors (Liu, L.)

Paper	Title	Page
WEPOW001	Sirius Status Report	2811
	A.R.D. Rodrigues, F.C. Arroyo, O.R. Bagnato, J.F. Citadini, R.H.A. Farias, J.G.R.S. Franco, L. Liu, S.R. Marques, R.T. Neuenschwander, C. Rodrigues, F. Rodrigues, R.M. Seraphim, O.H.V. Silva LNLS, Campinas, Brazil
	Sirius is a Synchrotron Light Source Facility based on a 4th generation low emittance storage ring that is presently under construction in Campinas, Brazil. During the last year, accelerator activities concentrated on R&D of the various subsystem components. However, the number of components under production or already delivered is also increasing according to planning. The building construction started in the beginning of 2015 and machine commissioning is expected to start mid 2018. In this paper we report on the present status of the project with emphasis on the last year activities.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW001
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THPMR011	Injection Dynamics for Sirius Using a Nonlinear Kicker	3406
	L. Liu, X.R. Resende, A.R.D. Rodrigues, F.H. de Sá LNLS, Campinas, Brazil
	The concept of injection using a single nonlinear kicker has been proposed and tested in several existing storage rings with reduction in the stored beam oscillations during the accumulation process. Despite the good results, this scheme has not yet been adopted for routine operation in these machines due to the reduced injection efficiency. The main cause for reduction in efficiency is precisely the nonlinearity of the kick at the injected beam position and the generally large injected beam size. In this paper we study the injection dynamics in the Sirius storage ring where beam accumulation is based only on the use of a nonlinear kicker. The whole injection system has been optimized from the start for high injection efficiency.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR011
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THPMR012	Optimization of Nonlinear Dynamics for Sirius	3409
	F.H. de Sá, L. Liu, X.R. Resende LNLS, Campinas, Brazil
	In this work we describe the optimization of the non-linear dynamics for the Sirius storage ring. The strong sextupoles of the lattice, necessary to correct the linear chromaticities, generate higher order terms in the tune-shifts with amplitude and energy, which may result in a large tune footprint for the machine. The configuration the sextupole families found that wraps this tune footprint and thus avoids dangerous resonances was achieved with minimization of Hamiltonian driving terms and tracking-based multi-objective algorithms include realistic values of misalignment and excitation errors of the magnets, orbit correction, insertion devices fields and real vacuum chamber apertures.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR012
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THPMR013	A New Optics for Sirius	3413
	L. Liu, X.R. Resende, F.H. de Sá LNLS, Campinas, Brazil
	We report on the latest optics modifications for the 3 GeV Sirius electron storage ring presently under construction at the Brazilian Synchrotron Light Laboratory, LNLS. Although the basic parameters are set and frozen, improvements in the magnetic lattice and beam optics are still being implemented. In particular, the central dipole in the 5BA cell has been replaced by an all-permanent-magnet dipole with a thin superbend in the center with peak magnetic field of 3.2 T and the operation mode has now symmetry 5, with 15 low βx straight sections and 5 high βx sections. The 3 GeV ring bare lattice emittance is now 0.25 nm.rad.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR013
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Paper

Title

Page

Sirius Status Report

2811

A.R.D. Rodrigues, F.C. Arroyo, O.R. Bagnato, J.F. Citadini, R.H.A. Farias, J.G.R.S. Franco, L. Liu, S.R. Marques, R.T. Neuenschwander, C. Rodrigues, F. Rodrigues, R.M. Seraphim, O.H.V. Silva
LNLS, Campinas, Brazil

Sirius is a Synchrotron Light Source Facility based on a 4th generation low emittance storage ring that is presently under construction in Campinas, Brazil. During the last year, accelerator activities concentrated on R&D of the various subsystem components. However, the number of components under production or already delivered is also increasing according to planning. The building construction started in the beginning of 2015 and machine commissioning is expected to start mid 2018. In this paper we report on the present status of the project with emphasis on the last year activities.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW001

Export •

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

THPMR011

Injection Dynamics for Sirius Using a Nonlinear Kicker

3406

L. Liu, X.R. Resende, A.R.D. Rodrigues, F.H. de Sá
LNLS, Campinas, Brazil

The concept of injection using a single nonlinear kicker has been proposed and tested in several existing storage rings with reduction in the stored beam oscillations during the accumulation process. Despite the good results, this scheme has not yet been adopted for routine operation in these machines due to the reduced injection efficiency. The main cause for reduction in efficiency is precisely the nonlinearity of the kick at the injected beam position and the generally large injected beam size. In this paper we study the injection dynamics in the Sirius storage ring where beam accumulation is based only on the use of a nonlinear kicker. The whole injection system has been optimized from the start for high injection efficiency.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR011

Export •

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

THPMR012

Optimization of Nonlinear Dynamics for Sirius

3409

F.H. de Sá, L. Liu, X.R. Resende
LNLS, Campinas, Brazil

In this work we describe the optimization of the non-linear dynamics for the Sirius storage ring. The strong sextupoles of the lattice, necessary to correct the linear chromaticities, generate higher order terms in the tune-shifts with amplitude and energy, which may result in a large tune footprint for the machine. The configuration the sextupole families found that wraps this tune footprint and thus avoids dangerous resonances was achieved with minimization of Hamiltonian driving terms and tracking-based multi-objective algorithms include realistic values of misalignment and excitation errors of the magnets, orbit correction, insertion devices fields and real vacuum chamber apertures.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR012

Export •

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

THPMR013

A New Optics for Sirius

3413

L. Liu, X.R. Resende, F.H. de Sá
LNLS, Campinas, Brazil

We report on the latest optics modifications for the 3 GeV Sirius electron storage ring presently under construction at the Brazilian Synchrotron Light Laboratory, LNLS. Although the basic parameters are set and frozen, improvements in the magnetic lattice and beam optics are still being implemented. In particular, the central dipole in the 5BA cell has been replaced by an all-permanent-magnet dipole with a thin superbend in the center with peak magnetic field of 3.2 T and the operation mode has now symmetry 5, with 15 low βx straight sections and 5 high βx sections. The 3 GeV ring bare lattice emittance is now 0.25 nm.rad.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR013

Export •

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