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ANITA-An active vibration cancellation system for scanning probe microscopy
L Pabbi1, A R Binion1, R Banerjee1
1Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
The Review of Scientific Instruments
|July 2, 2018
Summary
This study introduces an active vibration cancellation method for scanning probe microscopes. It significantly reduces noise by digitally adding a drive signal to the Z-feedback loop, enabling use in high-vibration environments.
Area of Science:
- Physics
- Instrumentation
- Materials Science
Background:
- Scanning probe microscopes (SPMs) are highly sensitive instruments.
- Vibrational noise from environmental sources degrades SPM performance.
- This noise causes relative motion between the probe tip and sample, affecting Z-feedback.
Purpose of the Study:
- To develop an active method for canceling vibrational noise in SPMs.
- To enable SPM operation in environments with significant structural or acoustic vibrations.
- To provide an accessible solution for enhancing SPM stability.
Main Methods:
- Implemented an active cancellation process by introducing a drive signal into the Z-feedback loop.
- Digitally calculated the drive signal using accelerometer-based vibration measurements.
- Integrated the solution with existing SPM instrumentation without major modifications.
Main Results:
- Successfully nullified the appearance of vibration in the Z-feedback signal.
- Significantly reduced vibration-induced noise in SPM operation.
- Demonstrated an inexpensive and easy-to-implement solution.
Conclusions:
- The active cancellation method effectively mitigates vibrational noise in SPMs.
- This technique allows for the deployment of sensitive SPMs in previously unsuitable noisy environments.
- The solution is ideal for integration with high-vibration systems like pulse tube cryocoolers.
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