About the LNLS Annual Users’ Meeting (RAU)

The Brazilian Synchrotron Light Laboratory (LNLS) of the Brazilian Center for Research in Energy and Materials (CNPEM) will hold the 35th LNLS Annual Users’ Meeting (RAU) from 5-6 November 2025. The event will take place at Sirius located 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 will seek to shed light on the main achievements of the community throughout this period and will prioritize lectures and keynotes by Brazilian and Latin American researchers. We will also have the participation of many former organizers of the event, such as members of the scientific committee.

Come celebrate with us.

Important Dates

Registration period
 to be confirmed
Abstract submission period to be confirmed
Abstracts acceptance notice to be confirmed
35th Annual Users’ Meeting 5-6 November

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

Assistance Program

Assistance Request for Participation

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

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

Check the Guidelines

  • Language

    • Panel discussions, plenary lectures, and keynote speeches will be delivered in English. 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

    • To be announced

  • 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.

Check the Official Photo of 34th RAU

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Funding Agencies

Scientific Commitee

Alexandre Rossi
Claudia Rodríguez Torres
Daniela Zanchet
Flávio Garcia
Gustavo Azevedo
Haroldo Cavalcanti Pinto
Hudson Carvalho
Izabel Cristina Vidotti Myata
João Basso Marques

João Alexandre R. G. Barbosa
Jonder Moraes
Leopoldo Suescun
Marcelo Ceolin
Márcio Soares
Maria do Carmo Martins Alves
María Fernanda Mera
Rogerio Paniago
Zélia Macedo