Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.116: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Recent progress on the open source software package GXSM — •Thorsten Wagner1 and Percy Zahl2 — 1Johannes Kepler University Linz, Institute of Experimental Physics, Linz, Austria — 2Brookhaven National Laboratory, Upton, USA
Since 1998 the open source software package GXSM has an increasing community of users and developers all over the world. [1] The linux based software packages provides in combination with a digital signal processor (DSP) a very flexible tools for acquiring and processing data of all kinds of scanning probe microscopes. [2] With the implementation of the vector probe engine [3], GXSM developed to a full spectroscopic system. Besides traditional point spectroscopy (STS) it acquires spectroscopic data on grids and does atom tracking and manipulation. Just recently new algorithm for the automatic drift correction and tip crash prevention (for force spectroscopy) were implemented. With intelligent over sampling it goes beyond the 16bit limit of the hardware. Up to four input channels, like tunnel current and oscillation frequency, can be used simultaneously and mixed for the Z feedback control. The new hardware platform “SR-MK3Pro” will also allow an internal PLL feedback to drive tuning fork and needle sensors.
[1] http://gxsm.sf.net and http://sranger.sf.net
[2] P. Zahl, M. Bierkandt, S. Schröder, and A. Klust, Rev. Sci. Instr. 74 (2003) 1222
[3] P. Zahl, T. Wagner, R. Möller, and A. Klust, J. Vac. Sci. Technol. B 28 (2010) C4E39