NEWS 1 November 2022

Reducing sample stage drift velocity

High-contrast imaging in transmission electron microscopes requires that thermal drift of the sample stage is minimised.

For this, the use of a Kalman filter strategy within the control structure of the stage has been investigated. A Kalman filter requires a thermal model of the stage construction, various inputs, and temperature measurements. In conjunction with a deformation model, this technique can compensate for drift. The compensation control strategy presented in this Mikroniek article has been validated using simulations based on multiple measurements. (Image courtesy of Marjolein Daanen, Thermo Fisher Scientific)


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