Document ATM-NUCL-GNL-CHE UN 51598 - European Organization for Nuclear Research

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Twelve nations are members of the European Organization for Nuclear Research (CERN), a new organization set up under UNESCO sponsorship to aid the co-operation between separate research centers in the field of nuclear theory. The CERN program is concentrated on two big machines, a spectro-cyclotron and a proton-synchrotron, now under construction at the CERN laboratory site near Geneva.
The synchro-cyclotron is designed to work at the 600 million electron volts energy level; it consists of a vacuum chamber bbetween the circular poles of a 2500 tons electro-magnet. Protons are injected in this chamber and accelerated along a spiral path by high frequency electrical forces until they reach speeds approaching 250000 km. per second.
This picture was taken inside the proton-synchrotron's ring building, which is at present under construction. Seen at right, in its well is one of the concrete columns that will support the machine; the bottom part of the column rests on bedrock. At left are two elastic steal supports which will be placed on top of the concrete column and around which the central concrete beam of the machine will be poured.

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UN photo 51598

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Protection period to: 1956-10-31
Geographical information: Switzerland

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