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113 superconducting high-tech magnets for the accelerator facility FAIR



GSI Helmholtzzentrum für Schwerionenforschung GmbH in Darmstadt, Germany, has placed an order with Babcock Noell GmbH for the manufacture and supply of 113 superconducting high-tech magnets for the accelerator facility FAIR. The magnets, each of which weighs more than a ton, are required for the central ring accelerator SIS100, the heart of the FAIR facility. This ring accelerator will accelerate charged particles to almost the speed of light for the various experiments at FAIR. The magnets that have been ordered will keep the ions on a circular path. Babcock Noell will set up a production line to manufacture the magnets and the superconducting cable at its Würzburg location.

Prior to the order being placed, a prototype magnet was successfully constructed at Babcock Noell in 2008. This prototype was thoroughly tested on the magnet test stand at GSI, where it fulfilled all the various requirements. Before construction of the prototype, GSI scientists and their colleagues from the Russian accelerator laboratory JINR in Dubna carried out years of development work. Here, they incorporated know-how about superconducting magnets that are already in operation at the accelerator in Dubna.

The magnets will be equipped with superconducting coils, whose magnetic fields can be modified very quickly. Thanks to the superconductivity, it is possible to generate high-strength fields of 1.9 Tesla (that’s equivalent to 40,000 times the strength of the earth's magnetic field) while keeping costs to a minimum. The combination of superconductivity plus the ability to change the magnetic field so quickly is unique in this form of application. Each of the 113 units is three meters long and weighs almost two tons.

FAIR (Facility for Antiproton and Ion Research) is one of the largest research projects worldwide. The research facility makes it possible to conduct a wide range of experiments in which physicists from all over the world can participate. It will enable scientists to gain insights into the structure of matter and the evolution of the universe.

Press release of Bilfinger Berger on the topic (German)

Newly developed magnet for the FAIR accelerator facility
3D-view of the planned facility FAIR
3D-view of the planned facility FAIR. The beam lines are shown in red. The existing buildings of the GSI Helmholtzzentrum für Schwerionenforschung can be seen on the left.
Babcock Noell GmbH
FAIR GmbH/GSI Helmholtzzentrum für Schwerionenforschung GmbH