MOPB074

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URL	https://doi.org/10.18429/JACoW-IPAC2025-MOPB074
Title	SOLEIL II project: entrance in the construction phase
Authors	L. Nadolski, A. Nadji, M. Tordeux, P. Brunelle, P. Alexandre, R. Nagaoka, A. Loulergue, K. Tavakoli, F. Marteau, M. Diop, X. Deletoille, M. Couprie, G. Abeille, Y. Abiven, F. Bouvet, S. Ducourtieux, C. Herbeaux, N. Hubert, O. Marcouillé, V. Le Roux, M. Nouna, J. Pruvost, G. Schaguène Synchrotron soleil
Abstract	SOLEIL II is the French upgrade project to build the science of tomorrow with synchrotron light radiation. Providing the highest brilliance in its class while maintaining the radiation range from IR to hard X-rays, the project is an ambitious triple upgrade of the SOLEIL facility: accelerators (new booster and storage ring), 29 beamlines and 3 laboratories, and an information technology transformation plan. High Order Achromat based on multi-bend achromat lattices will be used to replace both the storage (SR) and booster rings of the Synchrotron SOLEIL. The achieved equilibrium emittance of the SR (below 100 pm.rad, 354 m, 2.75 GeV) is about 50 times smaller than that of the existing Storage Ring (4000 pm.rad). To ensure the technical feasibility, an intensive R&D phase based on extensive numerical simulations, prototyping and measurements has been carried out. This paper presents the latest status of the project, the updated timeline, and describes the main results obtained so far in terms of performance and the prototypes launched in many technical domains (lattice, magnets, insertion device, vacuum, alignment…).
Paper	download: MOPB074.pdf
Cite	BibTeX, LaTeX, Text/Word, RIS, EndNote
Conference	16th International Particle Accelerator Conference
Series
Location	Taipei, Taiwan
Date	01-06 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN	978-3-95450-248-6
Online ISSN	2673-5490
Received	03 June 2025
Revised	03 June 2025
Accepted	04 June 2025
Issued	05 November 2025
DOI	10.18429/JACoW-IPAC2025-MOPB074
Pages	212-215
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.