Н.Н.Агапов Объединенный институт ядерных исследований, Дубна Нуклотрон - первый синхротрон со сверхпроводящими магнитами, специально созданный для ускорения ядер и тяжелых ионов. Этот ускоритель, предназначенный для получения пучков релятивистских частиц с энергией до 6 ГэВ на нуклон, был пущен в эксплуатацию шесть лет назад в Объединенном институте ядерных исследований в Дубне. The Nuclotron is the first superconducting synchrotron intended for acceleration of high energy nuclei and heavy ions. The accelerator designed to provide beams of relativistic particles with energies up to 6 GeV per nucleon, was put into operation six years ago at the Joint Institute for Nuclear Research in Dubna near Moscow. Cryogenic system of the Nuclotron includes three helium refrigerators. Each of them has a nominal capacity of 1600 W at 4.5 K. These refrigerators cool the accelerator ring, which has a perimeter of 251,5 m and a "cold" mass of about 80 tons. The ring of the Nuclotron comprises 96 dipole magnets 1.5m long and 64 quadrupole lenses 0.45 m long. The magnetic field of about 2 Т is formed with a "cold" iron yoke and a hollow superconductor with the two-phase helium flows inside. There are 28 correctors 0.31 m long with 3 or 4 types of windings in each, twelve 6 kA helium-cooled current leads, 234 leads of 100 A current for correcting windings, and also about 600 sensors of cryogenic temperatures. The experience of using novel technical solutions in the design of the Nuclotron cryogenic system is described. Full text in PDF (547.183) |