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U-70 (synchrotron)
U-70 ((ロシア語:У-70)) is a proton synchrotron with a final energy of 70 GeV, built in 1967 at the Institute for High Energy Physics in Protvino (near Serpukhov, Russia). The accelerator held the world record in beam energy at the time of its construction, and it still is the highest energy accelerator in Russia. In 1970, the U-70 scientists team was awarded the Lenin Prize for the development and commissioning of the synchrotron.
== Description of the accelerator complex ==
The complex operates in pulsed mode. Protons are accelerated to 30 MeV by linear accelerator URAL-30. Then they are injected into the fast-cyclic booster synchrotron U-1.5 having 100-m perimeter, where protons are accelerated to 1.32 GeV. Then the protons are injected to the U-70. After this, an acceleration cycle takes place for 9 sec, when protons are accelerated to the maximum energy of 76 GeV, and then, they are extracted from the ring to the secondary beams in the experimental halls. U-70 has perimeter about 1.5 km. Focusing structure type is FODO (strong focusing). The total weight of the magnetic system of over 20 000 t.
The prior injection of U-70 was a 100 MeV linear accelerator I-100 (until 1985).
A project for the UNK accelerator-storage complex, a proton-proton collider with an energy of 3 × 3 TeV, started in the mid 1980s. It was planned that U-70 becomes an injector for the collider ring, but the project was stopped because of the dissolution of the Soviet Union.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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