We are building up an ultra high vacuum STM system which works at 300 mK and  magnetic fields up to 14 T. The field can be applied perpendicular to the sample surface. For this purpose, a home-made scanning tunneling microsope (STM) is placed in a cryostat and in the center of a superconducting coil, which is cooled by liquid helium (4.2 K). The microscope is surrounded by helium-3, a rare helium isotope, which allows a cooling down to 300 mK.

Samples and tips of the scanning tunneling microscope can be prepared and preanalysed in two separated ultra-high vacuum chambers. The system ist equipped with an MBE evaporator, an argon sputtergun, a LEED/Auger unit and a sample heater stage.

As the scanning tunneling microscope is extremely sensitive to mechanical vibrations, the whole equipment ist located in an acoustic insulated room. The weight of the whole installation amounts to 2.5 tons and is additionally placed onto four air damping feet.