FELIX userstation
FELIX userstation

Facilities HFML-FELIX

The facilities at HFML-FELIX allow us to generate the highest possible static magnetic fields and intense infrared and Terahertz radiation with an unprecedented tuning range. Although our magnets and lasers are already exceptional in their own right, we established the combination of both providing unique opportunities. Scientists from all over the world come to HFML-FELIX to do research, use our equipment and advanced experimental end stations.

HFML-FELIX's unique combination

The high-field magnets and the free-electron lasers at HFML-FELIX facilitate cutting-edge research. The thing, however, that truly sets HFML-FELIX apart on a worldwide scale is the unique connection between both of our facilities and their equipment. This allows researchers to combine the highest magnetic fields with the most intense (far) infrared laser light and enter uncharted territories of science.

High-field magnets

We use high field magnets to investigate the properties of (new) materials. With these magnets, we can see into the matter without breaking anything. Many scientific insights once began with magnet research and the stronger the magnet, the more surprising the results. HFML-FELIX therefore has five magnets with a field strength of 30 to 38 Tesla and we are currently developing a hybrid magnet aiming at a maximum field of 45 Tesla.

Magnet specifications

Bitter Cell C1: 30 T, Ø 50 mm bore, 17 MW, 1x10-3 homogeneity, North Hall
Bitter Cell C2: 37.5 T, Ø 32 mm bore, 20.7 MW, 1x10-3 homogeneity, South Hall
Bitter Cell C3: 33 T, Ø 32 mm bore, 17 MW, 1x10-3 homogeneity, North Hall
Bitter Cell C4: 37.9 T, Ø 32 mm bore, power TBD, 1x10-3 homogeneity, South Hall
Bitter Cell C5: 33.0 T, Ø 32 mm bore, 17 MW, 1x10-3 homogeneity, North Hall
Bitter Cell C6: 45 T, Ø 32 mm bore, South Hall
Super Conducting Magnet S/C1 (Oxford Instruments®): 16 T, Ø 32 mm bore at liquid helium temp., Ø 21.6 mm in anticryostat, <10-4 homogeneity, First Floor Labtuin North, field centre 1420 mm from top flange.
Super Conducting Magnet S/C2 (Oxford Instruments®): 16 T, Ø 40 mm bore at liquid helium temp., Ø 33 mm in anticryostat, Ø 24 mm in VTI, <10^-4 homogeneity, Ground Floor 00.18, field centre 1420 mm from top flange.
Solid Pole Electro Magnet E1 (Varian®): 2 T max field, 38 mm gap, located on the Ground Floor, 00.18.

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Free-electron lasers

We house a suite of four free-electron lasers that produce (far) infrared light with an unprecedented tuning range and very high intensity. The infrared radiation of the lasers interacts with molecules and materials, which can reveal detailed information about their 3D structure, functional properties, and electronic properties. Cutting-edge research like this contributes significantly to the understanding of new functional materials, (bio)molecules and processes relevant to catalysis and astrochemistry.


The FELIX accelerator drives three FEL beam lines: FEL-1, FEL-2 and FELICE. Three beam lines can be operated in parallel, i.e. the FEL-1 or FEL-2 beam line, FELICE and FLARE. The specifications are given below.

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FELIX specifications
Felix basement

Using our facilities

Given our equipment's rare and advanced nature, there is a regular stream of requests from external parties wanting to utilise our facilities for their research. HFML-FELIX offers access to both academic and private users. For more information follow the button below.

Use our facilities

Take a look

Want to get a better picture of our facilities? Take a look for yourself! Experience a private visit to our lab through our virtual tour or watch the video of the opening below.

Take a virtual tour