Sirius will consist of a set of electron accelerators for experimental stations, called beamlines, and a building that will house all this complex. With 68,000 square meters, the building will be among the most sophisticated construction works ever performed in the Brazil.
Electron accelerators with the dimensions and technical specifications for the new Synchrotron Light Source Sirius and its beamlines require high-performance buildings and facilities, called critical-mission buildings, in which features such as stability (dimensional, thermal and vibrational) and maintenance availability and viability are essential. This is the building that will house the Sirius, one of the most advanced constructions ever built in the country.
This building is being installed adjacent to the CNPEM campus, located in Campinas, Sao Paulo, in an extension of land expropriated by the State Government of São Paulo for the construction of Sirius.
With 68,000 square meters of built area, the main Sirius building will have four floors with capacity for up to 620 people, including employees and visitors. The predominantly circular shape of the building is a result of the geometry of the main accelerator (storage ring), where electrons are stored and synchrotron light is produced.
It will house the three accelerators of electrons and up to 40 beamlines, six of which are considered long, with lengths ranging from 100 to 150 meters. The building and its implementation are designed so that two extra-long beamlines can be built in the future with experimental stations up to 250 meters away.
In addition to the experimental area, this building has in its interior areas for utilities and sources of current to the accelerators as well as support laboratories, data centers, operation and control room, living areas and offices.
One of the biggest challenges of Sirius is the stability (dimensional, thermal and vibrational). At Sirius, each electron beam, which in some segments of the accelerators is only 1.5 micrometers in vertical size, four times smaller than a red blood cell, must follow a circular path of 500 meters in circumference, 600,000 times every second for hours without oscillating more than one tenth its size.
The structure of the building will be made of cast-in-place reinforced concrete and all its floors, including the ground floor, will also be built in reinforced concrete slabs. Thus, the structure will present great rigidity, reducing the transmission of vibration from the action of the wind, the movement of people and the operation of equipment and facilities.
Both the foundation and the floor of the experimental hall and of the shielding of the accelerators are separated from the rest of the floors of the buildings in order to avoid differential settlements, distortion and propagation of vibrations, whether generated internally or from external environments.
The roofing will be in aluminium conical seam panels with insulation for low thermal transmittance, ensuring the highly stable temperature control required by the environment.
In 2013, an extension of the land adjacent to CNPEM was expropriated by the State Government of São Paulo for the construction of Sirius. The earthwork was started in that same year and completed in 2014. On December 19th, 2014, the contract was signed with the construction company and the cornerstone of the construction works was laid. In January 2015, the construction of the building for the new Synchrotron Light Source were effectively started.
In November 2018, the first stage of the project was concluded, including the construction works of the building that houses the entire research infrastructure, and the assembly of the Linear and Booster Accelerators. The Storage Ring is currently being assembled.
The delivery of the next stage of the project includes the start of the Sirius operation and the opening of the first six beamlines for researchers. The complete project includes seven other beamlines, expected to be opened in 2021.
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