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
 June 30th to September 10th
Abstract submission period June 30th to August 3rd
Abstracts acceptance notice August 25th
35th Annual Users’ Meeting 5-6 November

Registration Fees

Category of Registration 34th RAU 34th RAU + 1 satellite 34th RAU + 2 satellite Satellite
Students (Undergraduate) R$80,00 R$120,00 R$150,00 R$50,00 
Masters or Doctoral Students R$130,00 R$180,00 R$220,00 R$80,00 
Professionals (Bachelor, Master or Doctoral degrees, PHDs, Researchers, Teachers, Professors and others) R$230,00 R$300,00 R$350,00 R$120,00 

*Participants who choose to participate in the 34th RAU main event and at least 1 satellite gets a discount on the registration fee, according to this table.

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

    • The event official language is English. All information, content and presentations must be performed in this language.

  • 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.

Check the Official Photo of 34th RAU

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