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Dresden 2011 – scientific programme

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O: Fachverband Oberflächenphysik

O 16: Scanning probe methods I

O 16.5: Talk

Monday, March 14, 2011, 16:00–16:15, WIL C307

Miniature active damping stage for Scanning Probe Applications in Ultra High Vacuum — •Maximilian Assig1, Alexandra Ast2, Andreas Koch1, Wolfgang Stiepany1, Carola Strasser1, Klaus Kern1, and Christian R. Ast11Max-Planck-Institut für Festkörperforschung, Stuttgart — 2Institut für Technische und Numerische Mechanik der Universität Stuttgart

Scanning Probe experiments demand a low vibration level to keep the distance between tip and sample constant. Small changes in the spacing between probe and sample result in enormous variations of the measured signal no matter if it is the tunneling current in Scanning Tunneling Microscopy (STM) or atomic forces and phase shift in Atomic Force Microscopy (AFM) measurements. We present a six-degree of freedom active damping technique based on a Stewart platform (Hexapod) which is to operate in Ultra High Vacuum (UHV)[1]. We outline the main working principle and show the effect of the internal damping on Scanning Tunneling Microscopy measurements of a Si(111) 7x7 surface at Room Temperature.
D. Stewart, Proc. Instn. Mech. Engrs, 180, 371, 1965

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