Português
A Unique Building

Sirius has in its heart particle accelerators responsible for accelerating electron beams to very high speeds, very close to the speed of light, and for keeping them circulating in stable orbits for several hours in ultra-high vacuum, while producing synchrotron light. Each of these electron bunches has, in some sections of the accelerator, only 1.5 micrometers of vertical size, that is, about 50 times smaller than a strand of hair.

These tiny bunches must travel a circular path of 500 meters in circumference, 600,000 times every second, for hours, without their position oscillating more than a tenth of their size. This is important because the more stable and focused the electron beams circulating in the particle accelerators, the better and brighter the synchrotron light produced and delivered to the researchers.

Unprecedented Requirements

There were many challenges for the construction of the facilities that house Sirius, from the stability of the floor against deformations and the isolation of internal and external vibrations to the thermal stability of the environments and components. All construction aspects, from the foundation to the roof, had to consider unprecedented mechanical and thermal stability requirements.

Hence, the building is an essential part for the operation of this complex machine, which is why it is one of the most advanced civil constructions ever made in Brazil.

The foundation of the building is divided into two sections totally independent from each other: the first supports the building structure and the second supports the floor of the accelerator and experimental areas. The foundation of the accelerator area consists of around 1300 concrete piles, 15 meters long, carefully placed under almost three meters of modified soil with a high degree of compaction.

The floors that support the accelerator area and the beamline region are made of reinforced concrete, 90 and 60 centimeter thick, respectively. The floors are extremely flat: throughout its area, of 17 thousand square meters, the difference in height between the lowest point and the highest point of the floor is less than two centimeters.

The tunnel that houses the electron accelerators has a length of more than 500 meters, built as a monolithic piece of reinforced concrete. The accelerator tunnel has walls and roof between 80 centimeters and 1.5 meters thick.

The temperature inside the accelerator tunnel must be very well controlled with a maximum variation of plus or minus 0.1 °C. Also in the experimental area, good temperature control is required, with a maximum variation of plus or minus 0.5 °C.

Utility pipes are oversized, reducing fluid transport the speeds and the generation of vibrations during their propagation. Utility pipes are also suspended by springs to dampen the vibrations.

Construction Works

Covering a floor area of 68,000 square meters, the main Sirius building 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 particle accelerators where electrons are stored, and synchrotron light is produced.

In 2013, an area of 150 thousand square meters, adjacent to CNPEM, was expropriated by the State Government of São Paulo to build Sirius. In the same year, the earthworks began, completed in 2014. On December 19, 2014, the contract was signed with the construction company and the cornerstone of the construction works was laid.

In January 2015, the construction works began. By the end of that year, almost 20% of construction works were completed. In 2017, construction works reached 75% completion, with the successful execution of the most critical phase of construction: the implementation of the special floor on which accelerators and beamlines were later installed. In 2018, civil works were completed, and the installation of equipment began.

Sirius: Obras Civis / Construction Works 43



Português:
Status das Obras Civis em 25 de Julho de 2019.

English:
Status of the Construction Works on July 25th, 2019.

Sirius: Obras Civis / Construction Works 42



Português:
Status das Obras Civis em 25 de Junho de 2019.

English:
Status of the Construction Works on June 25th, 2019.

Sirius: Obras Civis / Construction Works 41



Português:
Status das Obras Civis em 6 de Maio de 2019.

English:
Status of the Construction Works on May 6th, 2019.

Sirius: Obras Civis / Construction Works 40



Português:
Status das Obras Civis em 17 de Abril de 2019.

English:
Status of the Construction Works on April 17th, 2019.

Sirius: Obras Civis / Construction Works 39



Português:
Status das Obras Civis em 20 de Março de 2019.

English:
Status of the Construction Works on March 20th, 2019.

Sirius: Obras Civis / Construction Works 38



Português:
Status das Obras Civis em 11 de Fevereiro de 2019.

English:
Status of the Construction Works on February 11th, 2019.

Sirius: Obras Civis / Construction Works 37



Português:
Status das Obras Civis em 11 de Janeiro de 2019.

English:
Status of the Construction Works on January 11th, 2019.

Sirius: Obras Civis / Construction Works 36



Português:
Status das Obras Civis em 11 de December de 2018.

English:
Status of the Construction Works on December 11th, 2018.

Sirius: Obras Civis / Construction Works 35



Português:
Status das Obras Civis em 12 de Novembro de 2018.

English:
Status of the Construction Works on November 12th, 2018.

Sirius: Obras Civis / Construction Works 34



Português:
Status das Obras Civis em 13 de Outubro de 2018.

English:
Status of the Construction Works on October 13th, 2018.

Sirius: Obras Civis / Construction Works 33



Português:
Status das Obras Civis em 19 de Setembro de 2018.

English:
Status of the Construction Works on September 19th, 2018.

Sirius: Obras Civis / Construction Works 32



Português:
Status das Obras Civis em 14 de Agosto de 2018.

English:
Status of the Construction Works on August 14th, 2018.

Sirius: Obras Civis / Construction Works 31



Português:
Status das Obras Civis em 11 de Julho de 2018.

English:
Status of the Construction Works on July 11th, 2018.

Sirius: Obras Civis / Construction Works 30



Português:
Status das Obras Civis em 15 de Junho de 2018.

English:
Status of the Construction Works on June 15th, 2018.

Sirius: Obras Civis / Construction Works 29



Português:
Status das Obras Civis em 17 de Maio de 2018.

English:
Status of the Construction Works on May 17th, 2018.

Sirius: Obras Civis / Construction Works 28



Português:
Status das Obras Civis em 19 de Abril de 2018.

English:
Status of the Construction Works on April 19th, 2018.

Sirius: Obras Civis / Construction Works 27



Português:
Status das Obras Civis em 16 de Março de 2018.

English:
Status of the Construction Works on March 16th, 2018.

Sirius: Obras Civis / Construction Works 26



Português:
Status das Obras Civis em 19 de Fevereiro de 2018.

English:
Status of the Construction Works on February 19th, 2018.

Sirius: Obras Civis / Construction Works 25



Português:
Status das Obras Civis em 16 de Janeiro de 2018.

English:
Status of the Construction Works on January 16th, 2018.

Sirius: Obras Civis / Construction Works 24



Português:
Status das Obras Civis em 14 de Dezembro de 2017.

English:
Status of the Construction Works on December 14th, 2017.

Sirius: Obras Civis / Construction Works 23



Português:
Status das Obras Civis em 10 de Novembro de 2017.

English:
Status of the Construction Works on November 10th, 2017.

Sirius: Obras Civis / Construction Works 22



Português:
Status das Obras Civis em 04 de Outubro de 2017.

English:
Status of the Construction Works on October 4th, 2017.

Sirius: Obras Civis / Construction Works 21



Português:
Status das Obras Civis em 23 de Agosto de 2017.

English:
Status of the Civil Works on August 23rd, 2017.

Sirius: Obras Civis / Construction Works 20



Português:
Status das Obras Civis em 10 de Julho de 2017.

English:
Status of the Construction Works on July 10th, 2017.

Sirius: Obras Civis / Construction Works 19



Português:
Status das Obras Civis em 12 de Junho de 2017.

English:
Status of the Construction Works on June 12th, 2017.

Sirius: Obras Civis / Construction Works 18



Português:
Status das Obras Civis em 4 de Maio de 2017.

English:
Status of the Construction Works on May 4th, 2017.

Sirius: Obras Civis / Construction Works 17



Português:
Status das Obras Civis em 24 de Março de 2017.

English:
Status of the Construction Works on March 24th, 2017.

Sirius: Obras Civis / Construction Works 16



Português:
Status das Obras Civis em 7 de Fevereiro de 2017.

English:
Status of the Construction Works on February 7th, 2017.

Sirius: Obras Civis / Construction Works 15



Português:
Status das Obras Civis em 3 de Janeiro de 2017.

English:
Status of the Construction Works on January 3rd, 2017.

Sirius: Obras Civis / Construction Works 14



Português:
Status das Obras Civis em 23 de Novembro de 2016.

English:
Status of the Construction Works on November 23rd, 2016.

Sirius: Obras Civis / Construction Works 13



Português:
Status das Obras Civis em 30 de Outubro de 2016.

English:
Status of the Construction Works on October 30th, 2016.

Sirius: Obras Civis / Construction Works 12



Português:
Status das Obras Civis em 30 de Setembro de 2016.

English:
Status of the Construction Works on September 30th, 2016.

Sirius: Obras Civis / Construction Works 11



Português:
Status das Obras Civis em 29 de Agosto de 2016.

English:
Status of the Construction Works on August 29th, 2016.

Sirius: Obras Civis / Construction Works 10



Português:
Status das Obras Civis em 19 de Julho de 2016.

English:
Status of the Construction Works on July 19th, 2016.

Sirius: Obras Civis / Construction Works 9



Português:
Status das Obras Civis em 24 de Junho de 2016.

English:
Status of the Construction Works on June 24th, 2016.

Sirius: Obras Civis / Construction Works 8



Português:
Status das Obras Civis em 28 de Abril de 2016.

English:
Status of the Construction Works on April 28th, 2016.

Sirius: Obras Civis / Construction Works 6



Português:
Status das Obras Civis em 16 de Fevereiro de 2016.

English:
Status of the Construction Works on February 16th, 2016.

Sirius: Obras Civis / Construction Works 5



Português:
Status das Obras Civis em 6 de Outubro de 2015.

English:
Status of the Construction Works on October 6th, 2015.

Sirius: Obras Civis / Construction Works 4



Português:
Status das Obras Civis em 20 de Julho de 2015.

English:
Status of the Construction Works on July 20th, 2015.

Sirius: Obras Civis / Construction Works 3



Português:
Status das Obras Civis em 10 de Março de 2014.

English:
Status of the Construction Works on March 10th, 2014.

Sirius: Obras Civis / Construction Works 2



Português:
Status das Obras Civis em 18 de Novembro de 2013.

English:
Status of the Construction Works on November 18th, 2013.

Sirius: Obras Civis / Construction Works 1



Português:
Status das Obras Civis em 9 de Setembro de 2013.

English:
Status of the Construction Works on September 9th, 2013.