qiu-xing.jiang at UTsouthwestern.edu
Wed Oct 21 13:04:17 PDT 2009
We recently found that the goniometer of our JEOL2200FS FEG has
information loss at the direction normal to the tilt axis when the
holder, eitehr RT or cryo, is tilted to ~25 degrees or higher. At 60
degrees the effect is quite severe, while at 0 degree it appears fine.
We are not seeing obvious vibration or drift at the affected direction
using a standard graphite grid. Our engineer is trying different ways to
trace it with limited success. I wonder if some of you ever encountered
similar problems and were able to eliminate them. Thanks in advance for
sharing your experience and offering advice.
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