SUM2026

The 20^th SOLEIL Users’ Meeting will take place from Thursday January 15^th to Friday 16^th, 2026 at SOLEIL.

This invaluable forum for the synchrotron radiation users’ community will provide the opportunity to exchange and learn about the evolution of the machine and the beamlines.

It will be also the occasion to share scientific, technical and practical issues about the synchrotron radiation use.

The plenary talks will cover recent research highlights of SOLEIL in the following areas:

Soft Matter
Geoscience

Scientific communications will be presented during three parallel sessions, selected from the submitted abstracts.

In the afternoon of January, 15th and 16th, a social time will be held at SOLEIL with stands from commercial exhibitors and the dinner buffet.

The novelty of this SUM2026 is the discussion times with two posters sessions: one dedicated to the synchrotron community (beamlines, scientific associations, …) and one dedicated to science.

A multidisciplinary satellite workshop « Radiation Damage » will be held on Wednesday 14th of January, 2026 at SOLEIL.

A satellite meeting is organized for the French community of X-ray absorption spectroscopists at SOLEIL on Friday afternoon the 16th of January, 2026.

Radiation damage satellite workshop

The "Radiation Damage" thematic workshop is proposed in response to an issue raised by SOLEIL’s users in the framework of an S2UO survey. This workshop aims to train, inform, and initiate discussion among SOLEIL users. The program of the workshop is thought to be multidisciplinary, with general presentations and examples from several communities.

The roundtable has been designed to be as interactive and constructive as possible for all communities affected by radiation damage.

A tutorial on the RADDOSE-3D software, dedicated to predicting radiation damage, will conclude the day. Information about the software is available here: https://www.bioch.ox.ac.uk/garmangroup#tab-792756

To follow the tutorial, you must have previously installed the software on your personal computer. The software cannot be installed on an Apple computer.

The program is available below.

Wednesday, January 14th, 2026 Radiation damage satellite workshop SOLEIL Auditorium - Main Building
09:00 - 09:30	Registration – Welcome – Coffee
09:30 – 09:40	Introduction to the workshop *Amélie Bordage* - Institut de Chimie Moléculaire et des Matériaux d'Orsay, Orsay (France)
09:40 – 10:25	PLENARY TALK A general introduction to radiation damage: Processes and quantification *Prof. Elspeth Garman* - Department of Biochemistry, Univ. of Oxford, Oxford (GB)
10:25 – 11:00	PLENARY TALK The different kinds of beam damages depending on who is speaking and looking / The European network for beam damages in CH (AIEA) *Dr. Mathieu Thoury* - IPANEMA, St Aubin (France)
11:00 – 12:30	A multidisciplinary viewpoint to radiation damage 4 talks from biology, catalysis/batteries/ chemistry, geosciences/environment, etc.
12:30 – 13:45	Lunch
13:45 – 14:30	Introduction to round table *Dr. Amelia Suzuki* - Institute of Heritage Science ISPC-CNR of Florence, Florence (Italy) Dr. Marine Cotte - ESRF, Grenoble (France)
14:30 – 16:00	Interactive and multidisciplinary round table - Experience exchange about how we deal with radiation damage - Brainstorming about the needs of our communities (instrumentation, attenuators, trainings, softwares...) *Dr. Amélie Bordage* - Institut de Chimie Moléculaire et des Matériaux d'Orsay, Orsay (France) Dr. Laurent Tranchant – Synchrotron SOLEIL, Saint-Aubin (France)
16:00 – 16:30	Coffee Break
16:30 – 17:20	Tutorial The RADDOSE-3D software program *Prof. Elspeth Garman -* Department of Biochemistry, Univ. of Oxford, Oxford (GB)
17:20 – 17:30	Conclusion *Organisers*

Tea-XAS Meeting

The TEA-XAS is a meeting dedicated to all SOLEIL users who use X-ray absorption spectroscopy. The objective of the TEA-XAS is twofold:

To give information about the status of the XAS beamlines (SOLEIL, French CRG beamlines of the ESRF) as well as their projects.
To provide space to the community for a discussion on your needs, expectations, questions, ideas, …

A project to unite the community of X-ray absorption spectroscopists is also under consideration, and this meeting of the French community will provide an opportunity to take stock on the project and discuss it together.

The afternoon will be divided into two parts: presentations of the beamlines by the XAS group leaders (SOLEIL, French CRG, ESRF), and an interactive roundtable discussion.

The programme is available below.

Please note that all the discussions will be held in French.

For more information, please contact sum2026@synchrotron-soleil.fr

Friday, January 16th, 2026 TEA-XAS Meeting SOLEIL Auditorium - Main Building
13:30 – 13:35	Introduction
13:35 – 14:35	Status and projects of the X-ray absorption beamlines Delphine Vantelon – Synchrotron SOLEIL, Saint-Aubin (France) Jean-Louis Hazemann (FAME/FAME-UHD) Marine Cotte - ESRF, Grenoble (France)
14:35 – 14:45	Status of the project to unite the French community of X-ray absorption spectroscopists Amélie BORDAGE - Institut de Chimie Moléculaire et des Matériaux d'Orsay, Orsay (France)
14:45 – 16:00	Interactive round table Amélie BORDAGE - Institut de Chimie Moléculaire et des Matériaux d'Orsay, Orsay (France) Charlotte CATROUILLET - Institut de Physique du Globe de Paris, Paris (France)
16:00	Plenary discussion and conclusions

Download the SUM2026 preliminary programme (563.48 KB)

Thursday, January 15th, 2026

SOLEIL Auditorium - Main Building
09:00 - 10:00	Registration & coffee
10:00 - 10:10	Welcome / Introduction, S2UO Chair – *Amélie BORDAGE*
10:10 - 10:50	SOLEIL General Director talk *– Jean SUSINI*
10:50 - 11:35	PLENARY TALK – SOFT MATTER Structure, properties and reactivity of oxide nanoparticles in solution : synchrotron studies Olivier DIAT & Matthieu VIROT - Institut de Chimie Séparative de Marcoule (CEA, CNRS, ENSCM, Univ. Montpellier), Bagnols sur Cèze (France)
11:35 - 12:05	SOLEIL Science Division talk – Eva PEREIRO, Amina TALEB
12:05 - 13:30	Lunch
13:30 - 15:40	Parallel sessions – 5 different rooms Structural Biology (Synchrotron Beamlines and CryoEM) Chemistry & Soft Matter (Characterization of structure and properties of chemical materials, reactivity, catalysis, chemical surfaces and interfaces / Soft matter) Diluted matter Geosciences / Environment / Cultural Heritage Physics & Advanced Materials (Structural, electronic and magnetic properties of matter / Physical surfaces and interfaces)
15:40 - 16:10	Coffee break
16:10 - 18:20	Parallel sessions – 5 different rooms Biology and Health Chemistry & Soft Matter (Characterization of structure and properties of chemical materials, reactivity, catalysis, chemical surfaces and interfaces / Soft matter) Diluted matter Geosciences / Environment / Cultural Heritage Physics & Advanced Materials (Structural, electronic and magnetic properties of matter / Physical surfaces and interfaces)
18:30 - 20:00	The Synchrotron Community Posters session (AFURS / GDR Coherex / Beamlines / Reciprocs Network / GDR XFEL) Commercial Exhibitors / Aperitif
20:00 - 21:30	Dinner
21:30	Bus transfer

Friday, January 16th, 2026

SOLEIL Auditorium - Main Building
9:00 - 9:45	PLENARY – GEOSCIENCES Structure Surface reactivity of tubular Al/Si nanoparticles: interactions with nucleic acids and implications for prebiotic scenarios Jérôme ROSE – CEREGE, Aix-en-Provence (France)
9:45 – 11:45	Scientific Posters session - Coffee break
11:45 - 12:00	Award of the best student poster – Roger Fourme Prize Conclusion
12:00 - 13:30	Lunch
13:30 - 15:00	Visit of 3 Beamlines – DESIRS / PX1 / SIXS

Scientific Committee

BIOLOGY / HEALTH	CULTURAL HERITAGE / ENVIRONEMENT / ARCHAEOLOGY / GEOSCIENCES
Paloma FERNANDEZ VARELA Laboratoire de Biologie Structurale Servier - Gif-Sur-Yvette Lorella PASCOLO Institute for Maternal and Child Health - Burlo Garofolo Pediatric Institute - Trieste (Italy)	Charlotte CATROUILLET Institut de Physique du Globe de Paris Simona RANERI University of Florence - Department of Earth Sciences – Florence (Italy)
DILUTED MATTER	MATTER & MATERIAL PROPERTIES: STRUCTURE, ORGANISATION CHARACTERISATION, ELABORATION
Pierre ASSELIN De la Molécule aux Nano-objets : Réactivité, Interactions et Spectroscopies - Paris Helgi Rafn HRODMARSSON Laboratoire inter-universitaire des systèmes atmosphèriques - Créteil	Amélie BORDAGE Institut de Chimie Moléculaire et des Matériaux d'Orsay - Orsay Eglantine BOULARD Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie - Paris
ELECTRONIC AND MAGNETIC PROPERTY OF MATTER – SURFACES AND INTERFACES	CHEMISTRY AND PHYSICO-CHEMISTRY - REACTIVITY IN SITU - SOFT MATTER
Sara GONZALEZ Institut de Nanotechnologies de Lyon - Villeurbanne Fabien SILLY CEA SPEC - Gif-Sur-Yvette	Luis CARDENAS Université Lyon, Université Claude Bernard-Lyon 1, CNRS, IRCELYON - Villeurbanne Asma TOUGERTI Unité de Catalyse et de Chimie du Solide - Université de Lille – Villeneuve d’Ascq

Local Organizing Committee

Eliott COGNÉ, Synchrotron SOLEIL
Mary-Anna DESTERMES, Synchrotron SOLEIL
Camille ENJOMMET, Synchrotron SOLEIL
Frédérique FRAISSARD, Synchrotron SOLEIL
Jean-Marc LUCACCHIONI, Synchrotron SOLEIL
France ROUET, Synchrotron SOLEIL
Stéphanie YAO, Synchrotron SOLEIL

Registration is open, click here.

Deadline for registration: December 14^th 2025

Registration fee is: 100 €.
It includes: attendance at the users meeting, buffets, lunches and coffee break

Please note that accommodation is NOT included in the registration fees. Please contact the Guest House directly to book a room (priority to students): Guesthouse.SOLEIL@elior-services.fr

PARTICIPANT TYPE	AMOUNT
Participant*	100€ VAT INCLUDED
Student, Invited speaker, member of Organisation Committee, SOLEIL	FREE

*Participants from the same laboratory:
We propose, for the participants of a laboratory, the following rule:
from 1 to 4 participants: 100€
/ from the 5th participant: 50€

Payment modalities

Payment by order form for French public institutions

Please do not pay your fees.
Please send an order form (which is mandatory for French public institutions) to the following address: sum2026@synchrotron-soleil.fr
Please indicate the name(s) of the participant(s), the service code Chorus Pro and the users meeting reference: SUM2026 / AG 69250605

Payment by bank transfer

Thank you for transmitting your payment by bank transfer to the following account number:
BNP Paris Bas International Bank Account Number
(IBAN): FR76 3000 4006 8400 0100 8245 430
Bank Identification Code (BIC): BNPAFRPPIFO
Synchrotron SOLEIL

With mentioning your name and the users meeting reference: SUM2026 / AG 69250605

Payment by credit card

A payment online is possible: you just have to select this mode of payment when registering and to follow instructions.

Call for abstract is open, click here.

Deadlines for contributions:
- Oral communications: October 29^th, 2025
- Posters / Plenary and Invited talks: December 14^th, 2025

For the Posters session: “The Synchrotron Community” on Thursday 15^th

Please provide, as “Contribution” only the title and the authors (in INDICO)

For the Oral communications, Plenary and Invited talks and the Scientific Posters session on Friday 16^th

Please provide as “Contribution” an abstract that follows instructions below (in INDICO):

To submit an abstract please use ONLY the template below (in WORD or .rtf format).

Any abstract which does not follow this format will be returned to the author.

File size is limited to 4MB.

TEMPLATE ABSTRACT

Roger Fourme Prize

The best poster presented by a student will receive a prize offered by SOLEIL.

This is a mission to a congress up to 1000 € (with original tickets).

The Prize will be awarded on Friday, January 16th, 2026 morning.

The students who have applied for the Best Poster Prize are required to attend the Friday, January 16th, 2026 morning session.

The candidates will be evaluated on the following criteria:

Clear presentation
Scientific interest
Originality
Visual aspects

The poster oral presentation in front of the jury should not exceed 4 minutes.

The S2UO committee will evaluate only the students who have applied for the Best poster Prize (Roger Fourme) when they have submitted their abstract.

Stand offer for companies

Registration is closed.

The number of available booths has been reached.

Advertising

Registration for advertising insert is open.

Deadline : December 14th 2025

The companies that so wish can insert an advertising page into the electronic abstract book of the Users’ Meeting, for an amount of 360,00 € all taxes included (300,00€ without taxes) per page.

Companies are requested to fill in the necessary form (download below) and to send it back to the following email adress: sum2026@synchrotron-soleil.fr
Please note that you need to send 1 page in A4 PDF format.

Exhibitors

Access to SOLEIL

If you come by car:

Geographic Address:
Synchrotron SOLEIL

l'Orme des Merisiers
Départementale 128
91190 Saint Aubin

GPS coordinates:
Latitude: 48.711922
Longitude: 2.146156
at the intersection of RD306 and D128

If you come by public transport:

From PARIS and CHARLES-DE-GAULLE airport
RER B direction SAINT-RÉMY-LÈS-CHEVREUSE until:

the station "MASSY-PALAISEAU" then BUS n°91-06 B or C direction SAINT-QUENTIN GARE, stop "L'ORME DES MERISIERS".
Timetable bus 91-06

the station "LE GUICHET" then join the bus station, take bus n°9, direction SACLAY, stop "L'ORME DES MERISIERS".
Timetable bus 9

station "GIF SUR YVETTE", take bus n° 10, stop SAINT AUBIN
Timetable bus 10

From Orly Airport, take the ORLYVAL, get off at ANTONY, take the RER B (see above) or take the BUS n°91-10 direction "Christ / N3"
Timetable RER.

List of hotels (not limited)

Maison d'Hébergement de SOLEIL - priority to students - Book your accommodation directly
L'Orme des Merisiers - 91190 GIF-SUR-YVETTE
Tel: +33(0)1 69 35 82 00
hebergement@synchrotron-soleil.fr

Hôtel Les Chevaliers des Balances - next to SOLEIL
Place de la Mairie - 91190 SAINT-AUBIN
Tél.: +33 (0)1 69 41 20 55 - Fax: +33 (0)1 69 85 50 75
E-mail: leschevaliersdesbalances@gmail.com
Web: www.leschevaliersdesbalances.fr

Hôtel Le Village**
4 rue Neuve - 91190 GIF-SUR-YVETTE
Tél.: +33 (0)1 69 28 82 51 - Fax: +33 (0)1 69 28 53 93
E-mail: hotel.le.village@wanadoo.fr
Web: http://hotellevillage.fr/

Hôtel d'Orsay - close to RER B
2 rue François Leroux - 91400 ORSAY
Tél.: +33 (0)1 64 86 17 47 - Fax: +33 (0)1 64 86 17 48
E-mail: hotel.orsay@orange.fr

Hôtel B&B
Plateau du Moulon - 91190 GIF-SUR-YVETTE
Tél.: +33 (0) 892 78 80 91 - Fax: +33 (0)1 69 35 34 59
Web: http://www.hotel-bb.com/

Hôtel Campanile Paris Sud
9 Ter Rue Joliot Curie - 91190 GIF-SUR-YVETTE
Tél.: +33 (0) 1 84 00 85 35
Web: https://www.campanile.com/fr/hotels/campanile-paris-saclay

Appart Hôtel Residhome Bures-Sur-Yvette La Guyonnerie
1 Rue de la Guyonnerie, 91440 BURES-SUR-YVETTE
Tél.: +33 (0) 1 64 86 36 00
Web: https://www.myresidhome.com/bures-sur-yvette/residhome-bures-la-guyonnerie/apparthotel-residence-hoteliere.html

For any questions, thank you to contact:
sum2026@synchrotron-soleil.fr