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D. Kohl, C. Kerschner, G. Schitter:
"Active damping by Q-control for fast force-distance curve measurements in atomic force microscopy";
Review of Scientific Instruments, 88 (2017), 5 pages.

This paper investigates the benefit of active damping by an analog Q-control circuit for measuring fast
force-distance curves in atomic force microscopy. By active damping of the cantilever oscillation after
snap-off, the down-ring time-constant is reduced significantly from 385 s to 23 s. Experimental
results demonstrate that the number of force-distance curves per second can be increased by a factor
of more than 30.