quarks and gluons and forming a new state, the quark-gluon plasma. SPD facility allows to collide the polarized beams of protons and deuterons to study the particle spin physics. Construction By 2013, an international tender for scientific equipment supply was completed selecting five core suppliers. Up to 2019, most of the equipment has been delivered and mounted. First tests began in late 2019. The construction that was initially scheduled to end in 2016 is now, as of 2020, to be accomplished by 2022. References External links Particle accelerators Science and technology in Russia Particle physics facilities