Science at low temperatures and high magnetic fields

At a Glance

  • STM and QPlus NC-AFM „ 
  • Optical access to tip & sample „
  • Joule-Thompson cooling for temperatures of T < 1.4K ( 3He operation on request) „ 
  • Dry magnet technology for magnetic fields of Bz = 3T „ 
  • LHe hold time > 100h (4 days)

The TESLA JT SPM is a Joule-Thompson cooled low temperature microscope working in ultra-high vacuum for advanced imaging and spectroscopy below T = 1.4K and magnetic fields up to BZ = 3T developed by Scienta Omicron and CryoVac.


General information

The cryostat contains a Joule-Thompson cooling stage mounted below the LHe bath cryostat with vapor-cooled shields and a surrounding LN2 vessel.

Interruption-free experiments for more than four days are possible due to the exceptional low consumption rates of LHe and LN2. The TESLA JT SPM head features multiple measurement modes including STM, NC-AFM (QPlus) and various spectroscopy modes including STS, IETS and force spec-troscopy. In-situ tip and sample exchange including four electrical contacts to the sample plate allow for an extended range of additional measurement modes.

A split pair superconducting magnet, developed by CryoVac, provides magnetic fields up to BZ = 3T while allowing optical access to tip and sample and in-situ evaporation at low temperatures. The new TESLA JT SPM can be combined with UHV transfer to ARPES and MBE modules.