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Thermo Fisher Scientific

Auto CTF is not working properly

Issue

Auto CTF is not working properly

Environment

Krios G3i

Resolution

These are possible resolutions for the issue:

  • Restore default settings

Cause

These are possible causes for the issue:

  • Sherpa setting not correct

Details

Auto stigmatism and auto coma of Auto CTF in the Sherpa is not working properly. Issue fixed by restore default settings.

Notes: As this tool has Cs image corrector, so the comma correct function is not available. The coma correction has to be done in the Cs image corrector software. For the non-Cs image corrected systems, Sherpa Auto CTF uses the beam tilt to correct coma .

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