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O: Fachverband Oberflächenphysik

O 37: Scanning Probe Techniques

O 37.12: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster A

A low-vibration SPM system for the mK-regime — •P. Borgens, A. Raccanelli, V. Cherepanov, F.P. Coenen, F.S. Tautz, and R. Temirov — Forschungszentrum Jülich GmbH, Deutschland

We report the progress in development of a mk-STM system cooled by adiabatic demagnetisation refrigeration (ADR). Our system features a 4He cryostat with 1K pot able of reaching 1.2K. The magnetic cooling unit uses a 2-stage ADR pill with the first stage precooling the wiring of the STM to 500mK and the second stage providing cooling to the base temperature of down to 35mK. The 1K pot can be operated by either a mechanical pumping stage or by a high capacity noise-free sorption pump that is able of providing the pumping for up to 100h. The specially developed KoalaDrive STM provides high stability against mechanical vibrations. For further reduction of the noise the entire system is located in a electromagnetically shielded and vibrationally isolated room.