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Oscillation Control Software


The new cockpit for AFM experiments

AFM experiments can range from simple intermittent contact imaging to multi-excitation and multi-frequency FM-AFM. The oscillation control software provides the advanced interface required for coping with all of these experimental challenges. It provides a simplified workflow and can be adapted to the complexity of the experiment with a few clicks, guaranteeing that the user only sees what is needed without compromising on functionality.
Under the hood, a set of advanced filters with up to 8th order slope and large cut-off frequency range allows for a precise amplitude and phase determination of the large dynamic range and multispectral signals typical for advanced AFM experiments.

  Focus on relevant information

The fully redesigned oscillation control module provides all necessary information for AFM operation with a compact and logical interface. Complex settings, multifrequency and controller configurations can be hidden thereby allowing for a better focus on the essential parameters. But just a few clicks are required for displaying the full feature set of the module.

  Multifrequency made easy

The multifrequency functionality is neatly integrated into the workflow of the oscillation controller. Configuration of the 4 independent demodulators is straightforward, and the digital integration of the module in the SPM control system greatly simplifies data acquisition compared to external solutions requiring analog interconnections.

  Optimized feedback loops: PerfectPLL™

The perfectPLL algorithm determines the optimal feedback parameters of both Amplitude and Phase loops based on the Q-factor. This ensures perfect operation of the PLL with no ringing or slow feedback behavior. All relevant parameters are measured and applied automatically in the Frequency Sweep module, leaving the user only with the demodulation bandwidth to choose from a few Hz up to 5kHz (i.e. trade-off between speed & resolution). The phase and amplitude controllers allow on-the-fly adjustments of the demodulation bandwidth for immediate system optimization.

  TrueDissipation

Dissipation measurements are a powerful tool to determine non-conservative interaction forces, but are often affected by instrument-induced apparent damping. The TrueDissipation method removes apparent damping components from measured dissipation data after performing a characterization of the measuring instrument. The calibration procedure runs semi-automatically, and the user is guided through all steps. Both scan and spectroscopy data can be corrected.

 


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