[3dem] Drift acceptance limit

[Ehsan Nikbin]

Dear Farzad,

I hope you are doing well. If you have a Gatan camera with the GMS software, you can use a DigitalMicrograph script to measure the drift. See the link below for example:
https://urldefense.com/v3/__http://www.dmscripting.com/drift_measurement.html__;!!Mih3wA!XEvWeNF8utpmPU5uUd7ct259z3UrZYJmY9EBk6d7U5tRG9FRHo4_ypYfr6bBHQMnsQ$ 
Drift Measurement - dmscripting.com<https://urldefense.com/v3/__http://www.dmscripting.com/drift_measurement.html__;!!Mih3wA!XEvWeNF8utpmPU5uUd7ct259z3UrZYJmY9EBk6d7U5tRG9FRHo4_ypYfr6bBHQMnsQ$ >
Script which periodically captures CCD or STEM images and uses cross correlation to measure the specimen drift. A cross correlation image, a vector plot (showing the direction and magnitude of the drift) and a plot of the instantaneous drift rate is displayed.
https://urldefense.com/v3/__http://www.dmscripting.com__;!!Mih3wA!XEvWeNF8utpmPU5uUd7ct259z3UrZYJmY9EBk6d7U5tRG9FRHo4_ypYfr6bvwloqHg$ 
Best regards,

Ehsan Nikbin
PhD Candidate, Department of Materials Science and Engineering
University of Toronto
________________________________
From: 3dem <3dem-bounces at ncmir.ucsd.edu> on behalf of Farzad <farzaad at gmail.com>
Sent: Wednesday, March 10, 2021 5:59 AM
To: 3DEM mailing list <3dem at ncmir.ucsd.edu>
Subject: [3dem] Drift acceptance limit

EXTERNAL EMAIL:
Dear Colleagues,

Is there any acceptance criterion for the stage drift value? Any recommendation from the companies or a method for calculating the drift according to the pixel size and fraction time?

Yours sincerely,

Farzad Hamdi
MLU-Halle
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