About the LNLS Annual Users’ Meeting (RAU)

The Brazilian Synchrotron Light Laboratory (LNLS) of the Brazilian Center for Research in Energy and Materials (CNPEM) held the 35th LNLS Annual Users’ Meeting (RAU) from 5-6 November 2025. The event took place at the CNPEM campus, in Campinas-SP.

The RAU is an important forum for discussions and exchange of information among users and scientists from LNLS, along with invited researchers. In this context, the meeting provides a critical space for the evaluation and presentation of proposals to enhance research facilities and currently available instrumentation. Furthermore, the RAU also serves as a platform for identifying the technical-scientific needs and expectations of the Brazilian and international scientific community regarding Sirius, the Brazilian synchrotron light source.

This year, 2025, we are celebrating the 35th anniversary of RAU and the 40th anniversary of LNLS. Thus, the event aimed to highlight the community’s main achievements throughout this period and prioritized lectures and keynotes by Brazilian and Latin American researchers. The initiative also featured the participation of many former organizers of the event, including members of the scientific committee.

Check the Official Photo of the 35th RAU

Important Dates

Open registrations and abstracts July 22, 2025
Abstracts deadline August 31, 2025
September 05, 2025
Selected abstracts and
selected assistance request notification		 From September 15, 2025
Registrations and payment deadline September 28, 2025
September 30, 2025
35th Annual Users’ Meeting 5-6 November, 2025

Registration Fees

Category of Registration 35th RAU
Students (Undergraduate) R$80,00
Masters or Doctoral Students R$130,00
Professionals (Bachelor, Master or Doctoral degrees, PhDs, Researchers, Teachers, Professors and others) R$230,00

  • Language

    • Documents, posters, and presentations may be prepared in Portuguese, Spanish, or English.

  • Target Audience

    • Undergraduate and graduate (master and doctoral) students and professionals interested in the use of synchrotron scientific instrumentation to perform cutting-edge experiments in areas such as Materials Science, Health and Pharmacology, Environmental Science  Energy, Biotechnology, X-ray Imaging, Oil and Gas, Chemistry, and others.

  • Selection of Participants

    • In case of exceeding the capacity, there will be selection by the Organizing Committee based on abstract contribution and first-come, first-served basis, according to the Registration Form.

  • Bright Ideas

    • In addition to ongoing research contributions, RAU also welcomes contributions related to new ideas to be performed at Sirius, the Brazilian synchrotron light source. This is not a call for proposals, it is just an open space to discuss with colleagues possible challenging experiments that can be performed at the Sirius facilities.

LNLS Users Group 2025 Aldo Craievich Thesis Award

Following the PhD Thesis Award of 2021, Masters Thesis Award 2022, Young Research Award 2023, and Undergraduate Award 2024, the LNLS Users Group (LNLSUG) organized the 2025 Aldo Craievich Thesis award, to recognize outstanding research work using LNLS facilities.

To be eligible for the 2025 Aldo Craievich Thesis Award, the candidate had to comply with the criteria and follow the application procedure detailed at the LNLSUG website: Awards. If pre-selected, candidates should present a 10-min talk during the 35th RAU/LNLS.

The award included a R$ 5.000,00 monetary prize (before taxes) and a certificate. It should be noted that the award is a recognition and not a remuneration for the work done. The decision was announced during the closing session of the 35th RAU/LNLS, November 06th 2025 and is published on the LNLSUG webpage.

Check the participation conditions, and the instructions for nomination submission, at the LNLSUG website
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Funding Agency

Assistance Program

Assistance Request for Participation

At the 35th RAU, candidates could request assistance for transportation and accommodation. Click the button below to understand the full rules and criteria for requesting participation assistance at the event.

Attention: Participants who apply for assistance were not exempt from the registration fee.

Check the Guidelines
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