The Superconducting FRagment Separator (Super-FRS) will be the most powerful in-flight separator in the world. Rare isotopes of all elements up to uranium will be produced at relativistic energies and spatially separated within a few hundred nanoseconds, enabling the study of very short-lived nuclei. The Super-FRS is the central device of the NUSTAR collaboration.

The Super-FRS is constructed in the frame of the FAIR international project. Scientists, engineers, and technicians of several countries are working together to carry out the construction of the machine. The core team is working on GSI-FAIR campus.

The realization of the Super-FRS machine is a sub-project of the FAIR international project. The sub-project Super-FRS has a defined scope (established by means of the Work Breakdown Structure), within defined time-planning and costs. Seven shareholder countries and several international companies are involved in the sub-project.  

To give you a flavour of what the machine is going to be, here you can find photos, designs, and videos of the Super-FRS components. Get your own impression of the forefront technology behind the superconducting fragment separator.

Super-FRS News


Quench Detection Units prototypes: production and testing campaign completed

Several prototypes of the FAIR Quench Detection Units (QuD-U), fully designed at GSI, were produced and tested between 2020 and early 2021. A QuD-U is composed of two separate printed circuit boards: the analog board  QuD-A which acquires voltages from the superconducting magnets, provide high voltage insulation and quench trigger generation, and the digital board QuD-D which enables data acquisition, remote control of the QuD-A and communication with the control system. For the SFRS machine two QuD-A assembly, dedicated to quite different magnet types, were developed. All QuD-U will be integrated into the SFRS magnet power converters.The R&D on the QuD-U prototypes was necessary in order to start the purchasing process of series components.


First-of-Series superconducting dipole type-3 delivered at its testing station at CERN

The FoS superconducting dipole of type-3 was delivered at the testing station at CERN. The magnet was produced by the company Elytt, Bilbao, Spain. The tesing station at CERN was built under the frame of a collaboration agreement with CERN and GSI. Currently, the superconducting long mutliplet (embedding one large quadrupole, three sextupoles, two short quadrupoles, two embedded octupoles, one steerer) is beeing tested. The superconducting dipole is now under check in the so-called preparation area. Its test will start in a few weeks.


Power Converter prototype delivered at FAIR

After the successfull Factory Acceptance Test, the prototype of the power converter type FR.Q4 was delivered to FAIR. The power converter FR.Q4 will be used to power the Super-FRS superconducting dipoles and quadrupoles. The prototype was built by the company Jäger, Germany. After the in-house site acceptence test (SAT), the protype will be used as patter for the production of series power converters.


Factory Acceptance Test of first iron block for shielding in target area and start of series production

With the successfull Factory Acceptance Test (FAT) of the first block of iron, the company Walzengießerei Coswig (Germany) is starting the series production. The foundry will produce iron blocks for about 2,600 tons. The iron blocks are the most relevant component of the lateral shielding in target area. They will surround the production target and the downstream magnets and components dumping the radiation outside the target area.


Detailed specifications approved for local cryogenics components

The detailed specifications of all components of the Local Cryogenics system are approved. Supplied by the FAIR cryogenic system, the Super-FRS Local Cryogenics system will distribute and feed cold helium to the 63 Super-FRS magnet cryostats. The system consists of dipole feed-boxes, multiplet feed-boxes, end boxes, a large valve box (called branch box) which connects braches with pre-cooler,  transfer lines, jumper connections, multi-purpose cold-warm return line, plus all the corresponding safety valves, instrumentation set-ups, and control-system hardware.


Factory Acceptance Test of the First-of-Series superconducting dipole type-3

The FAT of the FoS superconducting dipole of type-3 was concluded successfully at the production company Elytt, Bilbao, Spain. Elytt is manufacturing a total of 24 superconducting dipoles for the Super-FRS. The dipoles are clasisified into three groups: the standard dipoles of Type-3 (9,75° bending angle), the standard dipoles of Type-2 (11° bending angle), and the branched dipoles with a special Y-form, allowing two possible bendings. The latter magnets are located at the branching points, where the beam line forks into two branches.


Final Design Report of the superconducting branching dipoles approved

The FDR of the superconducting branching dipoles was approved. The branched dipoles are located at the branching points, where the beam line splits into two lines (branches). They have a special Y-form, allowing two possible bendings. For this reason, the sc branched dipoles required a special design.The design and production of the sc dipoles is done by the Spanish company Elytt in Bilbao.


Shielding flask tender: manufacturing contract awarded to company BNG

The tender for the production of the shielding flask was closed. The company Bilfinger Noell GmbH (BNG), Würzburg, Germany, was awarded for the manufacturing of this big component. Purpose of the shielding flask is the transport of highly radioactive material between the target area and the so-called "hot cell". The flask is equipped by a carrying frame and a winch that pulls it through a shaft of a length of about 8m. The wall thickness of the flask is designed in a way that at surface the maximum dose rate is below 100 µSv/h. The total weight is about 25 t.


OK for series production of superconducting long multiplets

The issue of a bank guarantee ratified the start of series production of superconducting long multiplets (see related article, in Italian). The company ASG Superconductors S.p.A., Genoa, Italy, is in charge for the manufacturing of 32 superconducting multiplets, among which 8 short multiplets (already in production) and 24 long multiplets. A multiplet is a group of several magnets embedded in a unique vessel. A long multiple will host up to 9 magnets, with a length of 7 meters, an high of 4,3 meters and a weight of 60 tons.


Final Design Report for lateral iron shielding in target area

The Final Design Report for the production of lateral iron shielding in target area is accepted. The blocks of iron are going to be manufactured by the company Walzengießerei Coswig (Germany). The foundry will produce iron blocks for about 2,600 tons. The blocks of iron will surround the production target and the downstream magnets and components dumping the radiation outside the target area.